CN116850522B

CN116850522B - Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device

Info

Publication number: CN116850522B
Application number: CN202310613063.3A
Authority: CN
Inventors: 王巍巍; 胡涛; 付学云; 梁瑞; 刘博�; 王占秋; 王晓东; 刘杰
Original assignee: Guangdong Heiwei Fireproof Technology Co ltd
Current assignee: Guangdong Heiwei Fireproof Technology Co ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2024-04-23
Anticipated expiration: 2043-05-26
Also published as: CN116850522A

Abstract

The application provides a solid aerogel perfluorinated hexanone fire extinguishing sheet, a preparation method thereof, a magnetic fire extinguishing patch and an energy storage device. The solid aerogel perfluorinated hexanone fire-extinguishing sheet comprises 90-100 parts of perfluorinated hexanone; 1 to 10 parts of nano-scale fireproof aerogel particles; 0.9 to 5 parts of urea-formaldehyde resin; 0.01 to 0.1 part of curing agent; 0.01 to 0.1 part of alcohol solvent; 1 to 5 parts of polyurethane; 0.01 to 0.1 part of catalyst. According to the solid aerogel perfluorinated hexanone fire extinguishing sheet, the nanoscale fireproof aerogel particles are used as carriers of perfluorinated hexanone, and the first packaging layer of urea-formaldehyde resin and the second packaging layer of polyurethane are matched, so that the content of perfluorinated hexanone is improved, the stability of a packaging finished product is ensured, and the fireproof and heat-insulating properties of the solid aerogel perfluorinated hexanone fire extinguishing sheet are improved, so that the solid aerogel perfluorinated hexanone fire extinguishing sheet is better suitable for the rapid fire extinguishing effect of a narrow closed space.

Description

Solid aerogel perfluorinated hexanone fire extinguishing sheet, preparation method thereof, magnetic fire extinguishing patch and energy storage device

Technical Field

The invention relates to the technical field of fire prevention, in particular to a solid aerogel perfluorinated hexanone fire extinguishing sheet, a preparation method thereof, a magnetic fire extinguishing patch and an energy storage device.

Background

The perfluoro-hexanone is an important halon extinguishing agent substitute, and because the perfluoro-hexanone is clear, colorless and odorless liquid, nitrogen is required to be used for super pressurization and is filled into a high-pressure container such as a steel bottle and the like, and meanwhile, a corresponding fire extinguishing matching is also required to be prepared to finish the fire extinguishing operation of flame.

However, by adopting the perfluorinated hexanone fire extinguishing mode, on one hand, the monitoring control system is complex, so that the fire extinguishing start is slower, quick and timely fire extinguishing cannot be realized, particularly, for a narrow closed space, the parts which are easy to generate fault fire, such as a cabinet, a switch cabinet, a power battery pack and the like, cannot be timely and effectively extinguished and protected to cause explosion, so that larger loss is caused, meanwhile, the matched parts are more, the space is larger, the application of the narrow closed space cannot be well adapted, and the other side is high in cost because the perfluorinated hexanone is highly volatile and needs to be regularly maintained and detected.

In order to solve the above technical problems, some scientific and technical personnel process liquid perfluoro-hexanone into solid perfluoro-hexanone, for example, patent CN202210516680 discloses a technology for curing perfluoro-hexanone and a preparation method thereof, and the perfluoro-hexanone is obtained by mixing and curing perfluoro-hexanone with a polymer material and a thermoplastic rubber material, but the content of perfluoro-hexanone obtained by adopting the curing is relatively low, so that the technology is not suitable for the effect of rapid fire extinguishing in a narrow enclosed space.

Therefore, a new solid perfluoro-hexanone appears in the market, for example, CN202210673236 discloses a perfluoro-hexanone microcapsule fire extinguishing material and a preparation method thereof, and perfluoro-hexanone microcapsule particles are prepared by coating perfluoro-hexanone by adopting a microcapsule process, although the content of perfluoro-hexanone in the perfluoro-hexanone microcapsule is improved, the capsule shell of the perfluoro-hexanone microcapsule comprises at least a first layer of shell and a second layer of shell, and the first layer of shell and the second layer of shell respectively comprise high polymer materials, so that the effect of quick release of the perfluoro-hexanone microcapsule is affected, and the quick fire extinguishing effect of a narrow closed space still cannot be well adapted. In addition, the capsule shell is coated with the perfluoro-hexanone by adopting the hydrocarbon combustible high polymer material, and the fireproof performance of the traditional perfluoro-hexanone material is still to be improved due to the poor fireproof and flame-retardant performance of the hydrocarbon combustible high polymer material.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a solid aerogel perfluorinated hexanone fire-extinguishing sheet with high content of perfluorinated hexanone and good fireproof and heat-insulating properties, a preparation method thereof, a magnetic fire-extinguishing patch and an energy storage device.

The aim of the invention is realized by the following technical scheme:

the solid aerogel perfluorinated hexanone fire extinguishing sheet comprises the following components in parts by weight:

In one embodiment, the nanoscale fire-resistant aerogel particles comprise at least one of SiO ₂ aerogel and AL ₂O₃ aerogel.

In one embodiment, the nano-sized fire-resistant aerogel particles have a particle size in the range of 10 μm to 1000 μm.

The preparation method of the solid aerogel perfluorinated hexanone fire-extinguishing sheet comprises the following steps:

mixing the perfluorinated hexanone, the nanoscale fireproof aerogel particles and the alcohol solvent to obtain perfluorinated hexanone-aerogel particles for standby;

Mixing urea-formaldehyde resin and water to obtain a prepolymer solution;

Adding the perfluorinated hexanone-aerogel particles and a curing agent into the prepolymer solution for mixing operation to obtain a perfluorinated hexanone-aerogel-resin suspension;

Filtering the perfluoro-hexanone-aerogel-resin suspension to obtain perfluoro-hexanone-aerogel-resin filter residues;

drying the perfluoro-hexanone-aerogel-resin filter residues to obtain solid perfluoro-hexanone aerogel particles;

And (3) curing the solid perfluorinated hexanone aerogel particles, polyurethane and catalyst to obtain the solid aerogel perfluorinated hexanone fire extinguishing sheet in any embodiment.

In one embodiment, the conditions for mixing the urea-formaldehyde resin with water are: the pH value is 8.8-9.0, the temperature is 60-80 ℃ and the time is 5-15 min.

In one embodiment, the mixing operation is performed with respect to the perfluorohexanone, the nano-sized fire-resistant aerogel particles, and the alcohol solvent at a rotational speed of no greater than 300rpm.

In one embodiment, the conditions under which the perfluoro hexanone-aerogel particles and curing agent are added to the prepolymer solution for mixing operation are: the pH value is 4.0-5.5, the temperature is room temperature, and the time is 2-5 h.

In one embodiment, the conditions for the curing operation of the solid perfluorohexanone aerogel particles, polyurethane, and catalyst are: the temperature is not higher than 40 ℃, and the curing time is 1-24 hours.

A magnetic fire extinguishing patch, which comprises a mounting plate, a first adhesive layer and the solid aerogel perfluorinated hexanone fire extinguishing sheet material in any embodiment,

The mounting plate, the first adhesive layer and the solid aerogel perfluorinated hexanone fire extinguishing sheet are sequentially stacked;

the magnetic fire extinguishing patch further comprises a magnetic attraction piece and a second adhesive layer, wherein the magnetic attraction piece is arranged on one surface of the mounting plate, which is away from the solid aerogel perfluorinated hexanone fire extinguishing sheet, and is connected with the mounting plate through the second adhesive layer, and the magnetic attraction piece is used for magnetically attracting and connecting with a metal shell of the energy storage device.

An energy storage device comprising the magnetic fire extinguishing patch according to any of the embodiments.

Compared with the prior art, the invention has at least the following advantages:

1) According to the solid aerogel perfluorinated hexanone fire-extinguishing sheet, as the nanoscale fireproof aerogel particles have a continuous and irregular porous network structure, the solid aerogel perfluorinated hexanone fire-extinguishing sheet can be used as a carrier of perfluorinated hexanone, so that a better storage space can be provided for perfluorinated hexanone, and the nanoscale fireproof aerogel particles can well absorb more perfluorinated hexanone liquid under the condition of an alcohol solvent, so that the perfluorinated hexanone-aerogel particles are obtained, and further, the higher content of perfluorinated hexanone in the solid aerogel perfluorinated hexanone fire-extinguishing sheet is better ensured, and meanwhile, the nanoscale fireproof aerogel particles have the continuous and irregular porous network structure, so that the release of perfluorinated hexanone is facilitated, and the rapid fire-extinguishing effect of a narrow closed space is better applicable; meanwhile, the added urea-formaldehyde resin can wrap and seal the perfluoro-hexanone-aerogel particles under the action of a curing agent and water, so that a first encapsulation layer is formed on the surfaces of the perfluoro-hexanone-aerogel particles, and solid perfluoro-hexanone aerogel particles are obtained, so that volatilization of perfluoro-hexanone is effectively avoided; the added polyurethane can carry out sealing and wrapping on the perfluoro-hexanone-aerogel particles and urea-formaldehyde resin under the condition of a catalyst to form a second packaging layer, so that volatilization of perfluoro-hexanone is further avoided, and the long-term storage requirement of the perfluoro-hexanone fire extinguishing tablet with the nanoscale fireproof aerogel particles as carriers is ensured. When the solid aerogel perfluoro-hexanone fire extinguishing sheet encounters high temperature or open fire, the first packaging layer of urea-formaldehyde resin and the second packaging layer of polyurethane can crack, and the perfluoro-hexanone contained in the solid aerogel perfluoro-hexanone fire extinguishing sheet can be released rapidly after cracking, so that the completely released perfluoro-hexanone can extinguish fire rapidly for the flame in a narrow enclosed space, and meanwhile, the completely released nanoscale fireproof aerogel particles can restore the original porous network structure, so that heat and smoke can be well contained, the effect of continuous fireproof heat insulation is achieved, the phenomenon that the smoke or heat in the enclosed space spreads to the outside is effectively avoided, and further, the better fireproof heat insulation effect is achieved, namely, the fireproof performance of the solid aerogel perfluoro-hexanone fire extinguishing sheet is improved.

2) Compared with the traditional single-use curing prepared solid perfluorohexanone or perfluorohexanone microcapsule fire-extinguishing material, the solid aerogel perfluorohexanone fire-extinguishing sheet not only improves the content of perfluorohexanone, but also can effectively ensure the quick release and long-term storage of the perfluorohexanone, thereby having a quicker fire-extinguishing effect on flame, and improving the fireproof and heat-insulating performance of the solid aerogel perfluorohexanone fire-extinguishing sheet so as to better adapt to the quick fire-extinguishing effect of a narrow enclosed space.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method of preparing solid aerogel perfluoro-hexanone fire-extinguishing sheet according to an embodiment of the invention;

FIG. 2 is a practical operation chart of the fire-proof and heat-insulating performance detection of the solid aerogel perfluorinated hexanone fire-extinguishing sheet;

FIG. 3 is a schematic view of a magnetic fire-extinguishing patch according to an embodiment of the present invention;

FIG. 4 is another direction physical diagram of the magnetic fire extinguishing patch shown in FIG. 3;

FIG. 5 is a schematic view of a direction of a magnetic fire extinguishing patch according to another embodiment of the present invention;

FIG. 6 is a cross-sectional view of the magnetic fire-extinguishing patch of FIG. 5;

FIG. 7 is a schematic diagram of an energy storage device according to an embodiment of the invention;

FIG. 8 is a schematic diagram of an energy storage device according to another embodiment of the present invention;

Fig. 9 is a schematic structural view of the magnetic fire extinguishing patch shown in fig. 3 at multiple viewing angles.

Reference numerals: 10. magnetic fire extinguishing paste; 100. a mounting plate; 110. an embedding groove; 120. a positioning groove; 200. a first adhesive layer; 300. solid aerogel perfluoro hexanone fire extinguishing sheet; 310. a fitting portion; 320. a bare portion; 400. a magnetic attraction piece; 410. a metal protective shell; 420. a magnet; 500. a second adhesive layer; 20. an energy storage device; 201. a metal housing; 2011. a receiving chamber; 202. and an energy storage component.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to better understand the technical scheme and beneficial effects of the present application, the following describes the present application in further detail with reference to specific embodiments:

The solid aerogel perfluorinated hexanone fire extinguishing sheet of an embodiment comprises 90-100 parts of perfluorinated hexanone; 1 to 10 parts of nano-scale fireproof aerogel particles; 0.9 to 5 parts of urea-formaldehyde resin; 0.01 to 0.1 part of curing agent; 0.01 to 0.1 part of alcohol solvent; 1 to 5 parts of polyurethane; 0.01 to 0.1 part of catalyst.

According to the solid aerogel perfluorinated hexanone fire-extinguishing sheet, as the nanoscale fireproof aerogel particles have a continuous and irregular porous network structure, the solid aerogel perfluorinated hexanone fire-extinguishing sheet can be used as a carrier of perfluorinated hexanone, so that a better storage space can be provided for perfluorinated hexanone, and the nanoscale fireproof aerogel particles can well absorb more perfluorinated hexanone liquid under the condition of an alcohol solvent, so that the perfluorinated hexanone-aerogel particles are obtained, and further, the higher content of perfluorinated hexanone in the solid aerogel perfluorinated hexanone fire-extinguishing sheet is better ensured, and meanwhile, the nanoscale fireproof aerogel particles have the continuous and irregular porous network structure, so that the release of perfluorinated hexanone is facilitated, and the rapid fire-extinguishing effect of a narrow closed space is better applicable; meanwhile, the added urea-formaldehyde resin can wrap and seal the perfluoro-hexanone-aerogel particles under the action of a curing agent and water, so that a first encapsulation layer is formed on the surfaces of the perfluoro-hexanone-aerogel particles, and solid perfluoro-hexanone aerogel particles are obtained, so that volatilization of perfluoro-hexanone is effectively avoided; the added polyurethane can carry out sealing and wrapping on the perfluoro-hexanone-aerogel particles and urea-formaldehyde resin under the condition of catalyst energy to form a second packaging layer, so that volatilization of perfluoro-hexanone is further avoided, and the long-term storage requirement of the perfluoro-hexanone fire extinguishing tablet with the nanoscale fireproof aerogel particles as carriers is ensured. When the solid aerogel perfluoro-hexanone fire extinguishing sheet encounters high temperature or open fire, the first packaging layer of urea-formaldehyde resin and the second packaging layer of polyurethane can crack, and the perfluoro-hexanone contained in the solid aerogel perfluoro-hexanone fire extinguishing sheet can be released rapidly after cracking, so that the completely released perfluoro-hexanone can extinguish fire rapidly for the flame in a narrow enclosed space, and meanwhile, the completely released nanoscale fireproof aerogel particles can restore the original porous network structure, so that heat and smoke can be well contained, the effect of continuous fireproof heat insulation is achieved, the phenomenon that the smoke or heat in the enclosed space spreads to the outside is effectively avoided, and further, the better fireproof heat insulation effect is achieved, namely, the fireproof performance of the solid aerogel perfluoro-hexanone fire extinguishing sheet is improved.

Compared with the traditional single-use curing prepared solid perfluorohexanone or perfluorohexanone microcapsule fire-extinguishing material, the solid aerogel perfluorohexanone fire-extinguishing sheet not only improves the content of perfluorohexanone, but also can effectively ensure the quick release and long-term storage of the perfluorohexanone, thereby having a quicker fire-extinguishing effect on flame, and improving the fireproof and heat-insulating performance of the solid aerogel perfluorohexanone fire-extinguishing sheet so as to better adapt to the quick fire-extinguishing effect of a narrow enclosed space.

The boiling point of the perfluoro-hexanone is 49 ℃, and the curing forming temperature of the urea-formaldehyde resin is low, so that the phenomenon that the perfluoro-hexanone volatilizes due to the fact that the curing temperature of the perfluoro-hexanone-aerogel particles is high when the perfluoro-hexanone-aerogel particles are wrapped and sealed can be effectively avoided, the solid aerogel perfluoro-hexanone fire-extinguishing sheet with high content can be prepared, and the urea-formaldehyde resin (a first packaging layer) can be more easily cracked when the solid aerogel perfluoro-hexanone fire-extinguishing sheet meets high temperature or open fire, so that the perfluoro-hexanone wrapped in the first packaging layer can be rapidly released, and the released perfluoro-hexanone can rapidly extinguish fire in a narrow sealing space, namely, the release speed of the perfluoro-hexanone is improved.

It should be noted that, since the polyurethane can be cured at room temperature, that is, the curing temperature can be controlled below 40 ℃, which is lower than the curing temperature (higher than 100 ℃) of thermosetting resin such as phenolic resin, on the one hand, the phenomenon that the perfluorohexanone volatilizes due to the fact that the curing temperature of the polyurethane is higher when the perfluorohexanone is subjected to the second packaging layer can be effectively avoided, so that the solid aerogel perfluorohexanone fire-extinguishing sheet with higher content can be prepared, on the other hand, the polyurethane structure has soft and hard 2 chain segments, and the solid perfluorohexanone aerogel particles can be cured well, so that the second packaging layer can be formed on the surface of the solid perfluorohexanone aerogel particles, the storage performance of the perfluorohexanone is improved, and the solid aerogel perfluorohexanone fire-extinguishing sheet with different structural strength and corrosion resistance can be processed, and the application range of the solid aerogel perfluorohexanone fire-extinguishing sheet in different narrow and small sealing spaces is widened.

It should be noted that, because the urea-formaldehyde resin is used as the first packaging layer and the second packaging layer of polyurethane, the cracking temperature of the first packaging layer and the second packaging layer is lower, when the flame in the narrow enclosed space is in the initial stage, the first packaging layer and the second packaging layer can crack under less flame to release the perfluorinated hexanone so as to achieve rapid fire extinguishing and cooling, thus the first packaging layer and the second packaging layer can kill the flame in the initial stage, effectively avoiding the flame spreading to the periphery to cause larger safety accidents and reducing loss.

It can be understood that the SiO ₂ aerogel and the AL ₂O₃ aerogel form a continuous irregular network skeleton, so that the unique nano porous structure of the SiO ₂ aerogel and the AL ₂O₃ aerogel can better provide higher storage capacity and heat insulation performance for the perfluorinated hexanone, thereby ensuring that the solid aerogel perfluorinated hexanone fire-extinguishing sheet with higher perfluorinated hexanone content and good fireproof performance is obtained.

It can be understood that if the particle size of the nano-scale fire-resistant aerogel particles is smaller than 10 μm, the storage capacity of the nano-scale fire-resistant aerogel particles for perfluoro hexanone will be reduced, and if the particle size of the nano-scale fire-resistant aerogel particles is larger than 1000 μm, the difficulty of wrapping and sealing the nano-scale fire-resistant aerogel particles by urea-formaldehyde resin will be increased to increase the reject ratio. Therefore, in one embodiment, the particle size of the nano-scale fireproof aerogel particles is 10-1000 μm, so that on one hand, the storage capacity of the nano-scale fireproof aerogel particles to the perfluorinated hexanone can be better ensured, and on the other hand, the solid aerogel perfluorinated hexanone fire-extinguishing sheet with higher content is prepared, and on the other hand, the particle size of the nano-scale fireproof aerogel particles is more suitable, so that the subsequent urea-formaldehyde resin can well wrap the nano-scale fireproof aerogel particles to form a first packaging layer with good sealing performance, thereby effectively avoiding volatilization of the perfluorinated hexanone, and further ensuring that the first packaging layer stores the perfluorinated hexanone well. In a preferred embodiment, the nano-sized fire-resistant aerogel particles have a particle size of from 500 μm to 800. Mu.m.

In one embodiment, the solid aerogel perfluorinated hexanone fire extinguishing sheet further comprises 0.01-0.1 part of fiber filler and 1-5 parts of flame retardance, so that the structural strength and the flame retardance of the solid aerogel perfluorinated hexanone fire extinguishing sheet are further improved, and the solid aerogel perfluorinated hexanone fire extinguishing sheet is better suitable for different application scenes of a narrow closed space.

In one embodiment, the curing agent is used in an amount of 0.1% -2% by mass of the urea-formaldehyde resin, so as to ensure that the added curing agent and the urea-formaldehyde resin can better wrap the nano-scale fireproof aerogel particles to form a first encapsulation layer with good sealing property.

In a preferred embodiment, the mass ratio of the perfluoro hexanone, the nano fireproof aerogel particles, the urea-formaldehyde resin and the polyurethane is (90-95): (4-5): 3:3, the high content of the prepared perfluorinated hexanone is ensured, the storage performance is long, the perfluorinated hexanone release speed is high, and the fire extinguishing effect is rapidly achieved, so that the flame is rapidly controlled in the initial stage, and the large loss is effectively avoided.

The application also provides a preparation method of the solid aerogel perfluorinated hexanone fire extinguishing sheet, so as to prepare the solid aerogel perfluorinated hexanone fire extinguishing sheet of any embodiment. It can be understood that by adopting the preparation method of the solid aerogel perfluorinated hexanone fire extinguishing sheet, the solid aerogel perfluorinated hexanone fire extinguishing sheet with high content of perfluorinated hexanone and good fireproof and heat insulation performance can be prepared, so that the rapid fire extinguishing effect of the solid aerogel perfluorinated hexanone fire extinguishing sheet on flame can be well improved, and the rapid fire extinguishing effect of the solid aerogel perfluorinated hexanone fire extinguishing sheet on narrow and small closed space can be well adapted.

Referring to fig. 1, in order to better understand the technical scheme and beneficial effects of the present application, the following describes in further detail a method for preparing a solid aerogel perfluorinated hexanone fire extinguishing sheet according to the present application in combination with a specific embodiment, where the method for preparing a solid aerogel perfluorinated hexanone fire extinguishing sheet according to an embodiment includes some or all of the following steps:

S110, mixing the perfluorinated hexanone, the nanoscale fireproof aerogel particles and the alcohol solvent to obtain perfluorinated hexanone-aerogel particles for later use.

It can be understood that the preparation is performed according to the formula of the solid aerogel perfluorinated hexanone fire-extinguishing sheet, then the mixing operation is performed on the perfluorinated hexanone, the nanoscale fireproof aerogel particles and the alcohol solvent, and the added alcohol solvent can help the perfluorinated hexanone to be well dispersed in the prepolymer solution because the perfluorinated hexanone is insoluble in water, so that the prepolymer solution can well wrap and seal the perfluorinated hexanone-aerogel particles. It is worth mentioning that when 0.01 to 0.1 part of alcohol solvent is added, the dispersibility of the perfluoro-hexanone in the prepolymer solution can be effectively improved, and especially 90 to 100 parts of perfluoro-hexanone and 1 to 10 parts of nano-scale fireproof aerogel particles are matched for use, so that the perfluoro-hexanone-aerogel particles can be well floated on the surface of the prepolymer solution to be wrapped and sealed to form a first packaging layer with good sealing property.

In one embodiment, the rotational speed of the mixing operation of the perfluorohexanone, the nano-scale fireproof aerogel particles and the alcohol solvent is not higher than 300rpm, so that the lower stirring speed can better ensure that the nano-scale fireproof aerogel particles are not broken on one hand, so that the nano-scale fireproof aerogel particles can store the perfluorohexanone and a small amount of the alcohol solvent in a maximum capacity manner, and further ensure that the solid aerogel perfluorohexanone fire-extinguishing sheet with higher content is prepared, and on the other hand, fewer bubbles can be avoided in the stirring process, so that the perfluorohexanone and a small amount of the alcohol solvent can be completely dispersed on the nano-scale fireproof aerogel particles, and the solid aerogel perfluorohexanone fire-extinguishing sheet with higher content is prepared.

In the embodiment, firstly, adding nano-scale fireproof aerogel particles into fluorohexanone and an alcohol solvent, then stirring at a constant speed, controlling the rotating speed to be not higher than 300rpm, and stopping stirring until the perfluorinated hexanone is completely immersed into the nano-scale fireproof aerogel particles to obtain the perfluorinated hexanone-aerogel particles for standby.

In one embodiment, the alcohol solvent may be ethylene glycol or ethanol.

And S120, mixing urea-formaldehyde resin with water to obtain a prepolymer solution.

It can be appreciated that, because the conventional solid state perfluorinated hexanone sheet adopts an in-situ method or a phase method or a microcapsule coating technology, an emulsifier is usually added in the conventional technologies to improve the dispersibility of the solution, but the conventional solid state perfluorinated hexanone sheet has the problems of complicated operation, environmental protection, low release speed of the perfluorinated hexanone with high content and the like. Therefore, in order to ensure that the solid state perfluorinated hexanone sheet with high content of perfluorinated hexanone, high release rate, good fireproof and heat-insulating performance and simple operation and environmental protection is prepared, the application obtains the prepolymer solution by mixing 0.9 to 5 parts of urea-formaldehyde resin and a proper amount of water, so that the prepolymer solution can be used as the wrapping liquid of the first packaging layer of perfluorinated hexanone, and the subsequent wrapping and sealing of perfluorinated hexanone-aerogel particles can be ensured.

In this example, the mass ratio of urea-formaldehyde resin to water was 1:30 to prepare a prepolymer solution. It is worth mentioning that, utilize the characteristic that the perfluoro-hexanone is insoluble in water and the alcohol solvent is soluble in water, make perfluoro-hexanone-aerogel granule add in prepolymer solution, perfluoro-hexanone-aerogel granule can float on the surface of prepolymer solution, cooperate with curing agent and operation of mixing stirring simultaneously, make perfluoro-hexanone-aerogel granule can wrap up by the prepolymer solution and seal, in order to form first encapsulation layer, in this way, easy operation and need not to increase the emulsifier, has reduced manufacturing cost effectively and more do benefit to the environmental protection. In particular, 0.01 parts to 0.1 parts of an alcohol solvent is blended to ensure that the perfluoro hexanone-aerogel particles float well on the prepolymer solution. It should also be noted that, since the subsequent drying operation is performed, the water can be effectively removed, so as to obtain a solid aerogel perfluorinated hexanone fire extinguishing sheet with a good content and a long storage time.

In one embodiment, the conditions for mixing the urea-formaldehyde resin with water are: the pH value is 8.8-9.0, the temperature is 60-80 ℃ and the time is 5-15 min. It can be appreciated that by controlling the pH of the urea-formaldehyde resin and water to be 8.8-9.0, the stability of the urea-formaldehyde solution colloid can be better maintained so that the perfluoro-hexanone-aerogel particles can be better encapsulated later. Further, the water is distilled water.

And S130, adding the perfluorinated hexanone-aerogel particles and the curing agent into the prepolymer solution for mixing operation to obtain the perfluorinated hexanone-aerogel-resin suspension.

It can be understood that, because the perfluoro-hexanone-aerogel particles contain a large amount of perfluoro-hexanone and a small amount of alcohol solvent, and because the prepolymer solution is a water-soluble urea-formaldehyde resin mixed solution, when the perfluoro-hexanone-aerogel particles are added into the prepolymer solution, the perfluoro-hexanone-aerogel particles can float on the surface of the prepolymer solution well, and the added curing agent is helpful for the solidification of the prepolymer solution on the surface of the perfluoro-hexanone-aerogel particles to form a first encapsulation layer, and meanwhile, the mixing operation is matched, so that the perfluoro-hexanone-aerogel particles can be fully encapsulated on the surface of the prepolymer solution to form a closed first encapsulation layer by solidification on the surface of the perfluoro-hexanone-aerogel particles, so that the perfluoro-hexanone-aerogel-resin suspension is obtained.

It can be understood that the mixture of the perfluoro-hexanone-aerogel particles, the curing agent and the prepolymer solution is controlled to have the pH value of 4.0-5.5, the temperature of room temperature and the time of 2-5 hours, so that the prepolymer solution can be ensured to better wrap and seal the perfluoro-hexanone-aerogel particles. It is worth mentioning that, because the temperature is room temperature, i.e. the room temperature is usually lower than the boiling point of the perfluoro-hexanone, the phenomenon that the perfluoro-hexanone-aerogel particles volatilize when being packed and sealed is ensured, and further, the solid aerogel perfluoro-hexanone fire-extinguishing sheet with higher content is ensured to be prepared.

To ensure that a higher content of solid aerogel perfluorohexanone fire-extinguishing sheet is produced, in one embodiment, the following operations are further included before the mixing operation of the perfluorohexanone-aerogel particles and curing agent into the prepolymer solution: the prepolymer solution was cooled to room temperature.

It is understood that, since the temperature of the prepolymer solution is 60 to 80 ℃ during the mixing operation, if the prepolymer solution is not cooled to room temperature, the phenomenon that the perfluoro hexanone adsorbed in the perfluoro hexanone-aerogel particles volatilizes when the perfluoro hexanone-aerogel particles are added to the prepolymer solution with higher temperature is easy to cause the decrease of the content of the perfluoro hexanone. Therefore, in the application, the temperature of the mixture operation of the perfluoro-hexanone-aerogel particles, the curing agent and the prepolymer solution is better ensured to be the room temperature by cooling the prepolymer solution to the room temperature, so that the phenomenon that the perfluoro-hexanone is easy to volatilize when the perfluoro-hexanone-aerogel particles are packed and sealed is more effectively avoided.

In one embodiment, the curing agent is an ammonium chloride curing agent.

And S140, filtering the perfluoro-hexanone-aerogel-resin suspension to obtain perfluoro-hexanone-aerogel-resin filter residues. It will be appreciated that, since the perfluoro-hexanone-aerogel-resin suspension is insoluble in the prepolymer solution, the separation of the perfluoro-hexanone-aerogel-resin suspension from the prepolymer solution is better achieved by the filtration operation of the perfluoro-hexanone-aerogel-resin suspension to ensure subsequent yields

S150, drying the perfluoro-hexanone-aerogel-resin filter residue to effectively remove liquid, such as water, on the surface of the perfluoro-hexanone-aerogel-resin filter residue, thereby obtaining solid perfluoro-hexanone aerogel particles with high content and long storage time.

S160, curing the solid perfluorinated hexanone aerogel particles, polyurethane and catalyst to obtain the solid aerogel perfluorinated hexanone fire-extinguishing sheet in any embodiment.

It can be understood that, because the curing temperature of the polyurethane is lower, the phenomenon that the perfluorohexanone volatilizes due to the fact that the curing temperature of the polyurethane is higher when the perfluorohexanone is subjected to the second packaging layer can be effectively avoided, so that the solid aerogel perfluorohexanone fire-extinguishing sheet with higher content can be prepared, and on the other hand, because the polyurethane structure is provided with soft and hard 2 chain segments, the solid perfluorohexanone aerogel particles can be better cured to form the second packaging layer, the storage performance of the perfluorohexanone is improved, and the solid aerogel perfluorohexanone fire-extinguishing sheet with different structural strength and corrosion resistance can be processed, so that the application range of the solid aerogel perfluorohexanone fire-extinguishing sheet in different narrow and small enclosed spaces is widened. It is worth mentioning that, because the urea-formaldehyde resin is used as the first packaging layer and the second packaging layer of polyurethane, the first packaging layer and the second packaging layer can kill the flame in the narrow enclosed space in the initial stage, effectively avoiding the flame spreading to the periphery to cause larger safety accidents and reducing the loss.

It can be understood that the curing temperature of the solid perfluorinated hexanone aerogel particles, polyurethane and catalyst is not higher than 40 ℃ and lower than the boiling point temperature of perfluorinated hexanone, so that the normal operation of polyurethane solids is ensured under the condition of ensuring the preparation of the solid aerogel perfluorinated hexanone fire extinguishing sheet with high content, thereby ensuring the preparation of the solid aerogel perfluorinated hexanone fire extinguishing sheet with high content of perfluorinated hexanone and good fireproof and heat insulation properties.

In the embodiment, the solid perfluorinated hexanone aerogel particles are mixed with 1 to 5 parts of polyurethane and 0.01 to 0.1 part of catalyst, and then are injected into a mold for curing and forming, wherein the curing temperature is not higher than 40 ℃, the curing time is more than 60 minutes, and the solid perfluorinated hexanone fire-extinguishing sheet is obtained after complete curing for 24 hours.

Compared with the traditional in-situ method or phase method, the preparation method of the solid aerogel perfluorinated hexanone fire extinguishing sheet not only reduces the use of an emulsifying agent, thereby simplifying the operation and being more beneficial to environmental protection, but also improves the perfluorinated hexanone content and the fireproof heat insulation performance of the solid aerogel perfluorinated hexanone fire extinguishing sheet, thereby better improving the rapid fire extinguishing effect of the solid aerogel perfluorinated hexanone fire extinguishing sheet on flame and being better suitable for the rapid fire extinguishing effect of a narrow closed space. In addition, the cracking temperature of the first packaging layer and the second packaging layer obtained by the preparation is low, so that the first packaging layer and the second packaging layer can kill flames in a narrow closed space in an initial stage, and the flames are effectively prevented from spreading to the periphery to cause larger safety accidents so as to reduce loss.

In this example, the polyurethane is a model 2260 polyurethane supplied by bayer corporation.

As shown in fig. 3 to 5, the present application further provides a magnetic fire extinguishing patch 10, which includes a mounting plate 100, a first adhesive layer 200, and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 according to any of the foregoing embodiments, where the mounting plate 100, the first adhesive layer 200, and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 are sequentially stacked; the magnetic fire extinguishing patch 10 further comprises a magnetic piece 400 and a second adhesive layer 500, the magnetic piece 400 is arranged on one surface of the mounting plate 100, which is away from the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, the magnetic piece 400 is connected with the mounting plate 100 through the second adhesive layer 500, and the magnetic piece 400 is used for magnetically attracting and connecting with the metal shell 201 of the energy storage device 20.

It can be appreciated that, because the cracking temperature of the first and second packaging layers of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is low, the first and second packaging layers can kill the flame in a narrow enclosed space in an initial stage, effectively avoiding the flame spreading around to cause a larger safety accident to reduce loss.

Therefore, in the present application, please refer to fig. 9 together, through stacking the mounting board 100, the first adhesive layer 200 and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 in sequence, the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be fixedly connected with the mounting board 100 through the first adhesive layer 200, and because the magnetic attraction piece 400 is disposed on one side of the mounting board 100 away from the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, the magnetic attraction piece 400 is connected with the mounting board 100 through the second adhesive layer 500, so that the magnetic attraction piece 400 can be fixed on one side of the mounting board 100 away from the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, on one hand, the exposed surface of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is not blocked, so as to better ensure the area of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 capable of directly contacting with flame, thereby ensuring the effect of extinguishing the solid perfluorinated hexanone fire extinguishing sheet 300 to be capable of fast performing fire extinguishing, and protecting the effect in the initial stage of fire, on the other hand, because the magnetic attraction piece 400 additionally disposed on the mounting board 100 is convenient for an operator to fast fix the fire extinguishing patch on the metal housing 201 of the energy storage device 20, on the other hand, the traditional and the error in operation can be avoided when the operator is repeatedly attached to the fire extinguishing device 10 by the magnetic attraction patch, and the error can be recovered, and the error can be avoided when the operator has performed the error in attaching the operation to the fire extinguishing device 10.

It should be noted that, because the cracking temperature of the first packaging layer and the second packaging layer of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is low, the replacement frequency of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 in long-term use becomes high, so the magnetic fire extinguishing patch 10 can be better suitable for the application of the energy storage device 20 with high replacement frequency.

Further, since the mounting plate 100, the first adhesive layer 200 and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 are stacked, the magnetic fire extinguishing patch 10 has a smaller space, which is beneficial to the development of the light and thin energy storage device 20, and ensures the flatness of the magnetic fire extinguishing patch 10, so that the magnetic fire extinguishing patch 10 can be flatly attached to the metal shell 201 of the energy storage device 20, and the connection stability of the magnetic fire extinguishing patch 10 and the metal shell 201 of the energy storage device 20 is ensured.

As shown in fig. 6, in one embodiment, the mounting plate 100 is formed with an embedded groove 110, the embedded groove 110 is adapted to the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is disposed in the embedded groove 110 in a clamping manner. It can be appreciated that, since the mounting plate 100 is formed with the embedded groove 110, the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be well clamped and arranged in the embedded groove 110, that is, the mounting plate 100 can well clad and fix the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, so that the stability of connection between the mounting plate 100 and the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is improved.

Further, as shown in fig. 6, in one embodiment, the solid aerogel perfluoro hexanone fire extinguishing sheet 300 includes a fitting portion 310 and a bare portion 320 connected to each other, the fitting portion 310 is disposed in the fitting groove 110 in a snap fit manner, and the bare portion 320 is disposed in the fitting groove 110 in a protruding manner. It can be understood that, because the engaging portion 310 is disposed in the embedding groove 110 in a clamping manner, so as to realize the fixation of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 and the mounting plate 100, and because the exposed portion 320 is disposed in the embedding groove 110 in a protruding manner, the exposed portion 320 of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be completely exposed in the embedding groove 110, so that the exposed portion 320 of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is ensured to be blocked, and the area of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 which can be in direct contact with flame can be well ensured under the condition of ensuring the connection firmness of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 and the mounting plate 100, so that the fire extinguishing effect of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be ensured to be extinguished rapidly, and a better fire extinguishing protection effect can be achieved at the initial stage of fire.

As shown in fig. 3, in one embodiment, the mounting plate 100 is a metal alloy plate. It can be appreciated that, because the metal alloy plate has better bearing capacity and higher flatness, the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be flatly adhered to the mounting plate 100, and further the flatness of the magnetic fire extinguishing patch 10 is better ensured. In addition, because the thermal conductivity of the metal alloy plate is better, the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 arranged at one end of the metal alloy plate can rapidly achieve the fire extinguishing effect, so that the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 can be ensured to comprehensively achieve the fire extinguishing protection effect, and the fire extinguishing speed of the solid aerogel perfluorinated hexanone fire extinguishing sheet 300 is improved. Further, the metal alloy plate is a galvanized iron plate.

In one embodiment, the mounting plate 100 is an integrally formed structure, so as to better ensure the stability of the structure of the mounting plate 100, thereby providing better support and heat transfer for the solid aerogel perfluorinated hexanone fire extinguishing sheet 300, and further ensuring the stability of the structure of the magnetic fire extinguishing patch 10.

As shown in fig. 6, in one embodiment, the magnetic attraction member 400 includes a metal protective case 410 and a magnet 420, wherein the magnet 420 is disposed in the metal protective case 410, and the metal protective case 410 is connected to the mounting board 100 through the second adhesive layer 500.

It can be appreciated that, since the metal protection case 410 is formed with the accommodating groove, the magnet 420 can be accommodated in the accommodating groove and connected with the mounting plate 100 through the second adhesive layer 500, so that the magnet 420 can be sealed and fixed in the metal protection case 410, on one hand, the phenomenon that the magnet 420 is easy to fall off magnetic powder due to friction during long-term use is effectively avoided, and therefore, the magnet 420 can still maintain good geomagnetic attraction after being recycled for many times, and on the other hand, good adhesiveness is ensured among the metal protection case 410, the second adhesive layer 500 and the mounting plate 100, and particularly, the use of a metal alloy plate is matched, so that the adhesiveness between the metal protection case 410 and the metal alloy plate is well ensured. Further, the metal protection shell 410 is a stainless steel protection shell, so that the adhesion and the thermal conductivity can be improved, and the corrosion resistance of the magnetic fire-extinguishing patch 10 can be improved, so that the application scene of the magnetic fire-extinguishing patch 10, such as severe environments including an electric automobile, an open-air charging cabinet and the like, can be better widened.

In one embodiment, as shown in fig. 5, positioning grooves 120 are formed on both sides of the mounting plate 100. It can be appreciated that by forming the positioning grooves 120 on both sides of the mounting plate 100 so that the hands of the operator are well placed in the positioning grooves 120, the operator can conveniently and rapidly take out the magnetically attractable fire extinguishing patch 10 attached in the metal housing 201 of the energy storage device 20. Specifically, the positioning grooves 120 are concavely formed on both sides of the mounting plate 100, so as to implement the positioning grooves 120.

As shown in fig. 7 and 8, the present application further provides an energy storage device 20, which includes the magnetic fire extinguishing patch 10 according to any of the embodiments described above. Specifically, in one embodiment, the fire extinguishing apparatus includes a metal housing 201, an energy storage assembly 202, and a plurality of magnetic fire extinguishing patches 10, where the metal housing 201 is formed with a receiving cavity 2011, the energy storage assembly 202 is disposed in the receiving cavity 2011, the plurality of magnetic fire extinguishing patches 10 are located in the receiving cavity 2011, and the magnetic pieces 400 of each magnetic fire extinguishing patch 10 are magnetically connected with the side walls of the receiving cavity 2011.

It can be appreciated that the plurality of magnetic fire extinguishing patches 10 are arranged in the accommodating cavity 2011, so that the plurality of magnetic fire extinguishing patches 10 can extinguish fire rapidly in the accommodating cavity 2011, the outward spreading and diffusion of the flame in the accommodating cavity 2011 are effectively avoided, the fire extinguishing protection effect can be achieved at the initial stage of fire, the loss caused by the fire is reduced, the installation and the operation are convenient, meanwhile, the misattached magnetic fire extinguishing patches 10 can be better recycled, and particularly when the mounting plate 100 uses a metal alloy plate, the metal alloy plate can also improve the heat conduction in the accommodating cavity 2011, namely the heat dissipation performance of the energy storage device 20 is improved.

In one embodiment, when the energy storage device 20 is a battery module, referring to fig. 7, the metal housing 201 includes a housing body and a housing cover, the housing body is formed with the accommodating cavity 2011, the housing cover is disposed on the housing body, and the housing cover is used for sealing the accommodating cavity 2011, and the plurality of magnetic fire extinguishing patches 10 are respectively disposed on one side of the housing cover facing the energy storage assembly 202, that is, the plurality of magnetic fire extinguishing patches 10 are ensured to be located above the energy storage assembly 202, so that the plurality of magnetic fire extinguishing patches 10 can more comprehensively play a better role in extinguishing protection on flames generated by the energy storage assembly 202, so as to reduce loss caused by fire.

In other embodiments, when the energy storage device 20 is a battery-changing cabinet or a charging cabinet, referring to fig. 8, the magnetic fire extinguishing patches 10 are respectively disposed above the side walls of the accommodating cavity 2011, so as to ensure that the magnetic fire extinguishing patches 10 can better perform a rapid fire extinguishing protection function on the flame generated by the energy storage component 202, so as to reduce the loss caused by fire.

1) According to the solid aerogel perfluorinated hexanone fire-extinguishing sheet, as the nanoscale fireproof aerogel particles have a continuous and irregular porous network structure, the solid aerogel perfluorinated hexanone fire-extinguishing sheet can be used as a carrier of perfluorinated hexanone, so that a better storage space can be provided for perfluorinated hexanone, and the nanoscale fireproof aerogel particles can well absorb more perfluorinated hexanone liquid under the condition of an alcohol solvent, so that the perfluorinated hexanone-aerogel particles are obtained, and further, the higher content of perfluorinated hexanone in the solid aerogel perfluorinated hexanone fire-extinguishing sheet is better ensured, and meanwhile, the nanoscale fireproof aerogel particles have the continuous and irregular porous network structure, so that the release of perfluorinated hexanone is facilitated, and the rapid fire-extinguishing effect of a narrow closed space is better applicable; meanwhile, the added urea-formaldehyde resin can wrap and seal the perfluoro-hexanone-aerogel particles under the action of a curing agent and water, so that a first encapsulation layer is formed on the surfaces of the perfluoro-hexanone-aerogel particles, and solid perfluoro-hexanone aerogel particles are obtained, so that volatilization of perfluoro-hexanone is effectively avoided; the added polyurethane can carry out sealing and wrapping on the perfluoro-hexanone-aerogel particles and urea-formaldehyde resin under the condition of catalyst energy to form a second packaging layer, so that volatilization of perfluoro-hexanone is further avoided, and the long-term storage requirement of the perfluoro-hexanone fire extinguishing tablet with the nanoscale fireproof aerogel particles as carriers is ensured. When the solid aerogel perfluoro-hexanone fire extinguishing sheet encounters high temperature or open fire, the first packaging layer of urea-formaldehyde resin and the second packaging layer of polyurethane can crack, and the perfluoro-hexanone contained in the solid aerogel perfluoro-hexanone fire extinguishing sheet can be released rapidly after cracking, so that the completely released perfluoro-hexanone can extinguish fire rapidly for the flame in a narrow enclosed space, and meanwhile, the completely released nanoscale fireproof aerogel particles can restore the original porous network structure, so that heat and smoke can be well contained, the effect of continuous fireproof heat insulation is achieved, the phenomenon that the smoke or heat in the enclosed space spreads to the outside is effectively avoided, and further, the better fireproof heat insulation effect is achieved, namely, the fireproof performance of the solid aerogel perfluoro-hexanone fire extinguishing sheet is improved.

Specific examples are set forth below, and all references to percentages are by weight. It should be noted that the following examples are not exhaustive of all possible scenarios, and that the materials used in the examples described below are commercially available unless otherwise specified.

Example 1

Adding 2 parts of SiO ₂ aerogel into 90 parts of perfluorohexanone and 0.01 part of ethylene glycol according to parts by weight, stirring at a constant speed, controlling the rotating speed to be 200rpm, stopping stirring until the perfluorohexanone is completely immersed into SiO ₂ aerogel, and obtaining perfluorohexanone-aerogel particles for later use; mixing 3 parts of urea-formaldehyde resin and 90 parts of distilled water (the mass ratio of the urea-formaldehyde resin to the distilled water is 1:30), regulating the pH value to 8.8, reacting at 70 ℃ for 10min, and cooling the prepared prepolymer solution to room temperature; adding and mixing the perfluoro-hexanone-aerogel particles and 0.03 part of ammonium chloride curing agent into a prepolymer solution (the use amount of the ammonium chloride curing agent is 1% of the mass ratio of urea-formaldehyde resin), regulating the pH value to 5.0, reacting for 3 hours at room temperature to obtain a perfluoro-hexanone-aerogel-resin suspension, filtering and washing the perfluoro-hexanone-aerogel-resin suspension to obtain perfluoro-hexanone-aerogel-resin filter residues, and drying the perfluoro-hexanone-aerogel-resin filter residues to obtain the solid perfluoro-hexanone aerogel particles.

Mixing the 33.3 parts of solid perfluorinated hexanone aerogel particles with 1 part of polyurethane and 0.01 part of catalyst, and then injecting into a mold for curing and forming at a curing temperature of 40 ℃ for 24 hours to obtain the solid aerogel perfluorinated hexanone fire extinguishing sheet.

Example 2

Adding 10 parts of AL ₂O₃ aerogel into 100 parts of perfluoro-hexanone and 0.1 part of ethanol according to parts by weight, stirring at a constant speed, controlling the rotating speed to be 250rpm, stopping stirring until the perfluoro-hexanone is completely immersed into the AL ₂O₃ aerogel, and obtaining perfluoro-hexanone-aerogel particles for standby; mixing 5 parts of urea-formaldehyde resin and 150 parts of distilled water (the mass ratio of the urea-formaldehyde resin to the distilled water is 1:30), regulating the pH value to 9.0, reacting at 80 ℃ for 5min, and cooling the prepared prepolymer solution to room temperature; adding and mixing the perfluoro-hexanone-aerogel particles and 0.1 part of ammonium chloride curing agent into a prepolymer solution (the use amount of the ammonium chloride curing agent is 2% of the mass ratio of urea-formaldehyde resin), regulating the pH to 5.5, reacting for 2 hours at room temperature to obtain a perfluoro-hexanone-aerogel-resin suspension, filtering and washing the perfluoro-hexanone-aerogel-resin suspension to obtain perfluoro-hexanone-aerogel-resin filter residues, and drying the perfluoro-hexanone-aerogel-resin filter residues to obtain the solid perfluoro-hexanone aerogel particles.

And mixing 166.7 parts of solid perfluorinated hexanone aerogel particles, 5 parts of polyurethane and 0.1 part of catalyst, and then injecting into a mold for curing and forming at a curing temperature of 40 ℃ for 20 hours to obtain the solid aerogel perfluorinated hexanone fire extinguishing sheet.

Example 3

Adding 4 parts of SiO ₂ aerogel into 95 parts of perfluorohexanone and 0.05 part of ethanol according to parts by weight, stirring at a constant speed, controlling the rotating speed to be 250rpm, stopping stirring until the perfluorohexanone is completely immersed into SiO ₂ aerogel, and obtaining perfluorohexanone-aerogel particles for later use; 3 parts of urea-formaldehyde resin and 90 parts of distilled water are stirred and mixed (the mass ratio of the urea-formaldehyde resin to the distilled water is 1:30), the pH value is regulated to 8.9, the mixture is reacted for 15min at 70 ℃, and the prepared prepolymer solution is cooled to room temperature; adding the perfluoro-hexanone-aerogel particles into a prepolymer solution, mixing, adding 0.03 part of ammonium chloride curing agent (the use amount of the ammonium chloride curing agent is 1% of the mass ratio of urea-formaldehyde resin), regulating the pH to 5.5, reacting for 3 hours at room temperature to obtain a perfluoro-hexanone-aerogel-resin suspension, filtering and washing the perfluoro-hexanone-aerogel-resin suspension to obtain perfluoro-hexanone-aerogel-resin filter residues, and drying the perfluoro-hexanone-aerogel-resin filter residues to obtain solid perfluoro-hexanone aerogel particles.

Mixing the 100 parts of solid perfluorinated hexanone aerogel particles with 3 parts of polyurethane and 0.1 part of catalyst, and then injecting into a mold for curing and forming at a curing temperature of 40 ℃ for 24 hours to obtain the solid aerogel perfluorinated hexanone fire extinguishing sheet.

Comparative example 1

The difference from example 3 is that the polyurethane in example 3 is replaced with phenolic resin, namely, comparative example 1 is obtained by mixing 100 parts of solid perfluorohexanone aerogel particles, 3 parts of phenolic resin and 0.1 part of catalyst, and then injecting into a mold for curing and forming, wherein the curing temperature is 150 ℃ and the curing time is 24 hours.

Comparative example 2

The difference from example 3 is that the polyurethane of comparative example 2 is replaced by acrylic emulsion, namely 100 parts of solid perfluorinated hexanone aerogel particles, 3 parts of acrylic emulsion and 0.1 part of catalyst are mixed, and then the mixture is injected into a mold for curing and molding, and the curing time is 24 hours at room temperature, so that the solid aerogel perfluorinated hexanone fire extinguishing tablet is obtained.

Comparative example 3

The difference from example 3 is that comparative example 3 uses a one-step method to prepare a solid aerogel perfluorohexanone fire extinguishing sheet, 4 parts of SiO ₂ aerogel, 95 parts of perfluorohexanone, 0.05 part of ethanol, 20 parts of polyurethane and 0.1 part of catalyst are mixed, and then the mixture is injected into a mold to be cured and formed, the curing temperature is 40 ℃, and the curing time is 24 hours, so that the solid aerogel perfluorohexanone fire extinguishing sheet is obtained.

The solid aerogel perfluorinated hexanone fire extinguishing sheets prepared in the examples 1-3 and the comparative examples 1-3 are subjected to detection of the content of perfluorinated hexanone, detection of storage stability and detection of fireproof heat insulation performance, and experimental data in the following table 1 are obtained:

The method for detecting the content of the perfluorinated hexanone is characterized in that the content of the perfluorinated hexanone is detected by a thermogravimetric analyzer and a heating metering weight loss ratio.

The method for detecting the storage stability performance is to place the solid aerogel perfluorinated hexanone fire extinguishing sheet at room temperature (25+/-2 ℃) for 100 days and then calculate the weight change rate of the solid aerogel perfluorinated hexanone fire extinguishing sheet.

Referring to fig. 2, the method for detecting the fireproof and heat-insulating performance records the initial time of flame extinguishment of the lighter, the time of complete extinguishment and the temperature of the backboard of the solid aerogel perfluorinated hexanone fire extinguishing sheet respectively.

TABLE 1

As can be seen from Table 1, since examples 1 to 3 use the nano-scale fire-proof aerogel particles as the carrier and urea-formaldehyde resin as the first encapsulation layer of the perfluorinated hexanone and polyurethane as the second encapsulation layer, the solid aerogel perfluorinated hexanone fire-extinguishing sheet prepared in examples 1 to 3 has relatively high content of perfluorinated hexanone, stable storage stability and good fire-proof and heat-insulating effects, and has shorter flame initiation fire-extinguishing time, so that the solid aerogel perfluorinated hexanone fire-extinguishing sheet can effectively control flame in an initial stage.

Further, since the mass ratio of the perfluorohexanone, siO ₂ aerogel, and urea-formaldehyde resin of example 1 was 90:2:3, the SiO ₂ dosage is small, the perfluoro-hexanone and the urea-formaldehyde resin dosage is excessive, so that the perfluoro-hexanone content of the embodiment 1 only reaches 85%, and the flame complete extinguishing time is longer than that of the embodiments 2-3.

Further, since the mass ratio of the perfluorohexanone, AL ₂O₃ aerogel, and urea-formaldehyde resin of example 2 is 100:10:5, the amount of aerogel in example 2 is large, the amount of perfluorohexanone is small, so that the content of perfluorohexanone in example 1 is only 84.7%, which is lower than that in examples 1 and 3, and the flame complete extinguishing time of example 2 is longer than that of example 3.

Further, since the mass ratio of the perfluorohexanone, siO ₂ aerogel, and urea-formaldehyde resin of example 3 was 95:4: and 3, the proportion of the three materials is relatively suitable, so that the comprehensive indexes of the embodiment 3 are optimal.

As can be seen from the embodiment 3 and the comparative example 1, the curing temperature of the phenolic resin of the comparative example 1 is far higher than the boiling temperature of the perfluorinated hexanone, so that the perfluorinated hexanone content of the solid aerogel perfluorinated hexanone fire extinguishing sheet prepared in the comparative example 1 is lower, and the fire extinguishing requirement cannot be met.

As can be seen from example 3 and comparative example 2, since comparative example 2 uses an acrylic emulsion for encapsulation, the solid aerogel perfluoro hexanone fire extinguishing sheet of comparative example 2 has poor storage stability, and long-term preservation of perfluoro hexanone cannot be achieved.

As can be seen from example 3 and comparative example 3, since comparative example 3 was prepared using a one-step process, not only the content of the perfluorohexanone of comparative example 3 was low, but also the encapsulation effect of the perfluorohexanone was affected to make the perfluorohexanone impossible to preserve for a long period of time.

The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The solid aerogel perfluorinated hexanone fire extinguishing sheet is characterized by comprising the following components in parts by mass:

90-100 parts of perfluoro hexanone;

1-10 parts of nanoscale fireproof aerogel particles;

0.9-5 parts of urea-formaldehyde resin;

0.01-0.1 part of curing agent;

0.01-0.1 parts of alcohol solvent;

1-5 parts of polyurethane;

0.01-0.1 part of catalyst;

the preparation method of the solid aerogel perfluorinated hexanone fire extinguishing sheet comprises the following steps:

mixing the perfluorinated hexanone, the nanoscale fireproof aerogel particles and the alcohol solvent to obtain perfluorinated hexanone-aerogel particles for later use;

Mixing the urea-formaldehyde resin with water to obtain a prepolymer solution;

adding the perfluorinated hexanone-aerogel particles and the curing agent into the prepolymer solution for mixing operation to obtain a perfluorinated hexanone-aerogel-resin suspension;

And (3) curing the solid perfluorinated hexanone aerogel particles, the polyurethane and the catalyst to obtain the solid aerogel perfluorinated hexanone fire extinguishing sheet.

2. The solid aerogel perfluoro hexanone fire suppression sheet of claim 1, wherein the nanoscale fire resistant aerogel particles comprise at least one of SiO ₂ aerogel and AL ₂O₃ aerogel.

3. The solid aerogel perfluoro hexanone fire suppression sheet of claim 1, wherein the nano-scale fire prevention aerogel particles have a particle size of 10-1000 μm.

4. The solid aerogel perfluoro hexanone fire extinguishing sheet of claim 1, wherein the conditions for mixing the urea-formaldehyde resin and water are: the pH is 8.8-9.0, the temperature is 60-80 ℃ and the time is 5 min-15 min.

5. The solid aerogel perfluoro-hexanone fire-extinguishing sheet of claim 1, wherein the rotational speed of the mixing operation of the perfluoro-hexanone, the nano-scale fire-resistant aerogel particles and the alcohol solvent is not higher than 300rpm.

6. The solid aerogel perfluoro hexanone fire suppression sheet of claim 1, wherein the conditions under which the perfluoro hexanone-aerogel particles and curing agent are added to the prepolymer solution for mixing operation are: the pH is 4.0-5.5, the temperature is room temperature, and the time is 2-5 h.

7. The solid aerogel perfluoro hexanone fire suppression sheet of claim 1, wherein the conditions for curing the solid perfluoro hexanone aerogel particles, polyurethane, and catalyst are: the temperature is not higher than 40 ℃, and the curing time is 1-24 h.

8. A magnetic fire extinguishing patch is characterized by comprising a mounting plate, a first adhesive layer and the solid aerogel perfluorinated hexanone fire extinguishing sheet material according to any one of claims 1-7,

9. An energy storage device comprising the magnetically attractable fire suppression patch of claim 8.