CN115368096B - Fibrous gypsum composite material, heating element and electronic atomizer - Google Patents

Fibrous gypsum composite material, heating element and electronic atomizer Download PDF

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Publication number
CN115368096B
CN115368096B CN202211000635.2A CN202211000635A CN115368096B CN 115368096 B CN115368096 B CN 115368096B CN 202211000635 A CN202211000635 A CN 202211000635A CN 115368096 B CN115368096 B CN 115368096B
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slurry
gypsum
composite material
fiber
gypsum composite
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CN115368096A (en
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陈家太
周胜文
林云燕
李雪
刘光烜
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Shenzhen Smiss Technology Co Ltd
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Shenzhen Smiss Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/70—Manufacture
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/18—Waste materials; Refuse organic
    • C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
    • C04B18/26—Wood, e.g. sawdust, wood shavings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Resistance Heating (AREA)

Abstract

The invention relates to the technical field of electronic atomization, in particular to a fiber gypsum composite material, which comprises, by mass, 60% -70% of wood fiber slurry and 30% -40% of gypsum composite; wherein the wood fiber slurry is prepared by treating natural wood fiber raw materials through chemical and/or physical processes; the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by mass. The fiber gypsum composite material provided by the invention adopts natural wood fiber and gypsum mixture as raw materials, accords with the environment-friendly design, has good compatibility and bonding property with the graphite flake, can be used as a heating element formed by the oil guide part and the graphite flake together, and improves the heating efficiency. The heating element provided by the invention has high heating efficiency, and most of the adopted materials are natural materials and can be recycled.

Description

Fibrous gypsum composite material, heating element and electronic atomizer
Technical Field
The invention relates to the technical field of electronic atomization, in particular to a fibrous gypsum composite material, a heating element, a preparation method and application thereof.
Background
The electronic atomizer is also called virtual cigarette, electronic cigarette, steam cigarette, etc. and is mainly used for simulating smoking feeling on the premise of not affecting health so as to replace cigarette use or help a user to achieve the purpose of stopping smoking.
The core component of the electronic atomizer is a heating component which is used for heating atomized liquid in the electronic atomizer to form smokeable smoke. The conventional heating assembly includes a porous substrate as an oil guiding portion for absorbing and transporting an atomized liquid, and a heating member provided on the porous substrate as a heat generating portion for heating the atomized liquid to form a mist.
The heating part is mainly made of iron-chromium-aluminum materials, and the oil guiding part is made of ceramic materials, but the ceramic materials are not recyclable or have low recycling rate. At present, the technology also relates to the use of chemical synthetic materials such as polypropylene or polyurethane for the oil guiding part, and the chemical synthetic materials have good hydrophobicity and lipophilicity, but are extremely difficult to biodegrade. In addition, the porous materials such as crop straws or wood fibers are used as the oil guiding part, the oil absorption of the materials is good, but the strength is low, the materials are required to be compounded with other materials for forming, and the heat conduction efficiency of the heating element is low. When the heat conduction efficiency of heat-generating body is not enough, can't in time atomize oil, can't satisfy atomizing demand.
Therefore, how to provide a heating element of an electronic atomizer with environmental protection and high heating efficiency is always a problem to be solved.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an environment-friendly fibrous gypsum composite material and a heating element capable of improving heat generation efficiency.
One embodiment of the invention provides a fiber gypsum composite material, which comprises, by mass, 60% -70% of wood fiber slurry and 30% -40% of gypsum composite;
the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by mass.
The invention also provides a preparation method of the fiber gypsum composite material, which comprises the following steps:
mixing the lignocellulosic slurry, the gypsum composite, and a solvent to form a slurry;
preparing the slurry into a multilayer blank structure by adopting a tape casting method;
and performing freeze drying treatment on the multilayer green body structure to obtain the fiber gypsum composite material.
In one embodiment, the solvent is an ethanol-water mixed solvent with the volume concentration of ethanol of 10-15%, and the solid content of the slurry is 85-95 wt%; and/or
The conditions of the freeze-drying treatment include: freezing at-4 to-18 deg.c for 12-16 hr, and drying at 80-100 deg.c for 8-10 hr in inert gas environment.
The invention further provides a heating body, which comprises an oil guide part and a heating part connected with the oil guide part, wherein the oil guide part is of a porous cavity structure made of the fiber gypsum composite material, the heating part is a graphite sheet, and the heating part and the oil guide part form an integrally formed structure.
In one embodiment, the graphite sheet has a thickness of 10 μm to 80 μm, and the oil guide has a thickness of 1mm to 2mm.
In one embodiment, the heat generating portion and the oil guiding portion form the integrally formed structure through the following steps:
and compounding the heating part on the surface of the oil guide part, and baking to prepare the integrally formed structure.
In one embodiment, the baking temperature is 190-200 ℃ and the baking time is 2-4 h.
In one embodiment, prior to baking, the method further comprises the step of cutting cells in the middle of the graphite sheet.
In one embodiment, the resistance of the heating element is 0.8 to 1.4 ohms.
Still another embodiment of the present invention provides an electronic atomizer, including a housing, an electrode, and the heating element described above, wherein the electrode and the heating element are mounted in the housing, and the electrode is electrically connected to a heating portion of the heating element.
The fiber gypsum composite material provided by the invention adopts natural wood fiber and gypsum mixture as raw materials, accords with the environment-friendly design, has good compatibility and bonding property with the graphite flake, can be used as a heating element formed by the oil guide part and the graphite flake together, and improves the heating efficiency.
In the heating element, the graphite sheet of the heating part can form a uniform resistance layer inside the heating element, and heat conduction is performed by an infrared radiation mode so as to heat the oil guide part. The heating element provided by the invention has high heating efficiency, and most of the adopted materials are natural materials and can be recycled.
Drawings
FIG. 1 is a schematic view of an oil guiding part of a heating element according to an embodiment;
FIG. 2 is a schematic diagram of a heat-generating body of an embodiment;
reference numerals:
1: an oil guide part; 2: a heating part; 3: an electrode.
Detailed Description
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. Preferred embodiments of the present invention are given below. 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.
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.
In the present invention, the numerical ranges are referred to as continuous, and include the minimum and maximum values of the ranges, and each value between the minimum and maximum values, unless otherwise specified. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range description features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to include any and all subranges subsumed therein.
The temperature parameter in the present invention is not particularly limited, and may be a constant temperature treatment or a treatment within a predetermined temperature range. The constant temperature process allows the temperature to fluctuate within the accuracy of the instrument control.
One embodiment provides a fiber gypsum composite material, which comprises, by mass, 60% -70% of wood fiber slurry and 30% -40% of gypsum composite; wherein the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by weight.
Specifically, the content of the wood fiber slurry in the raw materials of the fiber gypsum composite material can be 60%, 62%, 64%, 66%, 68% or 70% by mass; the gypsum composite may be present in an amount of 32%, 34%, 36%, 38% or 40%.
In one example, the lignocellulosic pulp is a fibrous pulp produced by chemically and/or physically treating a natural wood fiber feedstock.
In one example, the method of making the lignocellulosic slurry includes the steps of:
s110: sieving natural wood fiber raw material, soaking in alkaline solution, drying, ball milling and preparing crude fiber.
In one example, the raw material of the fiber slurry is one or more of wood chips, bamboo chips, bagasse, and straw.
In one example, the mesh number of the screen is 400 mesh to 600 mesh.
In one example, the alkaline solution is 15-20% calcium hydroxide aqueous solution by mass percent.
In one example, the soaking time is 1 to 3 months.
In one example, the ball milling time is 12-48 hours.
S120: and soaking the crude fiber in an alkaline solution, ball-milling, suction filtering and washing to prepare the wood fiber slurry.
In one example, the alkaline solution is 15-20% calcium hydroxide aqueous solution by mass percent.
In one example, the soaking time is 1 to 3 months.
In one example, the ball milling time of the crude fiber is 2 to 4 hours, and the temperature is 130 to 140 ℃.
In one example, the above-described fiber slurry is prepared by washing the above-described crude fiber to neutrality after suction filtration.
Still another embodiment provides a method for preparing the fibrous gypsum composite material described above, comprising the steps of:
s210: mixing the wood fiber slurry, the gypsum compound and a solvent to prepare slurry.
In one example, the solvent is an ethanol-water mixed solvent with an ethanol volume concentration of 10% -15%.
In one example, the slurry has a solids content of 85wt% to 95wt%. Specifically, the solid content of the above slurry may be 85wt%, 86wt%, 87wt%, 88wt%, 89wt%, 90wt%, 91wt%, 92wt%, 93wt%, 94wt% or 95wt%.
S220: preparing the slurry into a multilayer blank structure by adopting a tape casting method;
s230: and performing freeze drying treatment on the multilayer green body structure to obtain the fiber gypsum composite material.
In one example, the fibrous gypsum composite material described above has a porous structure.
In one example, the conditions of the freeze drying process include: freezing at-4 to-18 deg.c for 12-16 hr, and drying at 80-100 deg.c for 8-10 hr in inert gas environment.
The fiber gypsum composite material provided by the invention adopts natural wood fiber and gypsum mixture as raw materials, accords with the environment-friendly design, has good compatibility and bonding property with the graphite flake, can be used as a heating element formed by the oil guide part and the graphite flake together, and improves the heating efficiency.
An embodiment provides a heating body, including lead oily portion 1 and with lead oily portion 1 connect the portion 2 that generates heat, lead oily portion for adopt the porous cavity structure that above-mentioned fibrous gypsum combined material made, the portion that generates heat is graphite flake, the portion that generates heat with lead oily portion and form integrated into one piece's structure.
In one example, the heat generating portion and the oil guiding portion are integrally formed by:
and compounding the heating part on the surface of the oil guide part, and baking to prepare the integrally formed structure.
In one example, the graphite sheet has a thickness of 10 μm to 80 μm.
In one example, the thickness of the oil guide part is 1mm to 2mm.
In one example, the baking temperature is 190-200 ℃ and the baking time is 2-4 h.
In one example, prior to baking, a step of cutting cells in the middle of the graphite sheet is also included. The resistance of the heating element can be adjusted by cutting a cell in the middle of the graphite sheet, and meanwhile, oil can be better guided.
In one example, the resistance of the heating element is 0.8 to 1.4 ohms.
In the heating element, the graphite sheet of the heating part can form a uniform resistance layer inside the heating element, and heat conduction is performed by an infrared radiation mode so as to heat the oil guide part. The heating element provided by the invention has high heating efficiency, and most of the adopted materials are natural materials and can be recycled.
In one example, the heating element is prepared by the following steps:
1. crushing one or more natural wood fiber raw materials of wood chips, bamboo chips, bagasse and straw, sieving with a 400-600 mesh sieve, soaking in 15-20% calcium hydroxide aqueous solution for 1-3 months, drying and dehydrating, and ball milling at 130-140 ℃ for 12-48 h to obtain crude fibers.
2. Soaking the crude fiber in 15-20% calcium hydroxide water solution for 1-3 months, ball milling at 130-140 deg.c for 2-4 hr, suction filtering, washing and depositing to neutrality to obtain wood fiber slurry.
3. According to the mass percentage, 60-70% of the wood fiber slurry and 30-40% of the gypsum compound are mixed, and then added into an ethanol water mixed solvent with the volume concentration of 10-15% of ethanol, so as to obtain the slurry with the solid content of 85-95 wt%.
Wherein the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by weight.
4. And preparing the slurry into a multilayer green body structure by adopting a tape casting method.
5. Freezing the multi-layer green body structure at the temperature of-4 ℃ to-18 ℃ for 12h to 16h, and drying the multi-layer green body structure at the temperature of 80 ℃ to 100 ℃ for 8h to 10h in an inert gas environment to obtain the fiber gypsum composite material with the thickness of 1mm to 2mm, wherein the fiber gypsum composite material is used as an oil guiding part of a heating body, as shown in figure 1.
6. Graphite sheet 2 having a thickness of 10 μm to 80 μm as a heat generating part is compounded on the surface of the oil guiding part 1 and baked at 190 to 200 ℃ for 2 to 4 hours to obtain a heat generating body having an integrally molded structure, as shown in fig. 2.
Before baking, the graphite sheet is subjected to porous treatment, and cells are cut in the middle of the graphite sheet so as to better conduct oil, and meanwhile, the resistance of the heating element is adjusted, and meanwhile, the resistance of the heating element can be set to be 0.8-1.4 ohms by adjusting the width and the length of the graphite sheet.
An embodiment provides an electronic atomizer, including casing, electrode 3 in fig. 2 and above-mentioned heat-generating body, the electrode with the heat-generating body is installed in the casing, the electrode with the heat-generating portion electricity of heat-generating body is connected.
The following are specific examples:
example 1:
the embodiment provides a heating element, which is prepared by the following steps:
1. crushing 50 parts of wood chips, 10 parts of bamboo chips and 40 parts of bagasse, sieving with a 500-mesh sieve, soaking in a 20-percent calcium hydroxide aqueous solution for 3 months, drying, dehydrating, and ball-milling for 24 hours to obtain crude fibers.
2. Soaking the crude fiber in a calcium hydroxide aqueous solution with the mass percentage of 20% for 1 month, ball-milling for 4 hours at the temperature of 140 ℃, filtering, washing and precipitating to be neutral, and obtaining the wood fiber slurry.
3. According to the mass percentage, 70 percent of the wood fiber slurry and 30 percent of the gypsum compound are mixed, and then added into an ethanol water mixed solvent with the volume concentration of ethanol of 15 percent, so as to obtain the slurry with the solid content of 85 percent.
Wherein the gypsum compound comprises, by mass, 95 parts of dihydrate gypsum, 4.8 parts of silicate and 0.2 part of sodium carboxymethyl cellulose.
4. And preparing the slurry into a multilayer green body structure by adopting a tape casting method.
5. The above-mentioned multi-layer green body structure was frozen at-18℃for 16 hours, and then dried at 100℃for 8 hours in a nitrogen atmosphere to obtain a fibrous gypsum composite material having a thickness of 1mm and a specification of 1 mm. Times.2 mm. Times.5 mm, as an oil guiding portion of a heating element, as shown in FIG. 1.
6. Graphite sheet having a thickness of 17 μm was compounded as the heat generating portion 2 on the surface of the oil guiding portion 1, and baked at 200℃for 3 hours to obtain a heat generating body having an integrally molded structure, as shown in FIG. 2.
Before baking, the graphite sheet is subjected to porous treatment, and cells are cut in the middle of the graphite sheet so as to better conduct oil, and meanwhile, the width and the length of the graphite sheet are adjusted to set the resistance of the heating element to be 1.2 ohms.
7. The saturated oil absorption of the heating element was measured and found to be 0.22g.
8. The heating element was connected to electrode 3 in fig. 2, and the tobacco tar was dropped, and the heating element was heated to 200 ℃ by energization, and atomized at constant temperature for 5 seconds, and the atomization amount was calculated to be 0.18g and the atomization efficiency was 0.18/0.22×100% =82% based on the weight difference between the heating element before and after atomization.
Example 2:
the embodiment provides a heating element, which is prepared by the following steps:
1. 10 parts of bamboo chips, 20 parts of straw and 70 parts of bagasse are crushed, sieved by a 400-mesh sieve, soaked in 15 mass percent calcium hydroxide aqueous solution for 3 months, dried and dehydrated, and ball-milled for 24 hours to obtain crude fibers.
2. Soaking the crude fiber in a calcium hydroxide aqueous solution with the mass percentage of 20% for 1 month, ball-milling for 4 hours at the temperature of 135 ℃, filtering, washing and precipitating to be neutral, and obtaining the wood fiber slurry.
3. According to the mass percentage, 65 percent of the wood fiber slurry and 35 percent of the gypsum compound are mixed, and then added into an ethanol water mixed solvent with the volume concentration of 10 percent of ethanol to obtain the slurry with the solid content of 90 percent.
Wherein the gypsum compound comprises, by mass, 96 parts of dihydrate gypsum, 3.8 parts of silicate and 0.2 part of sodium carboxymethyl cellulose.
4. And preparing the slurry into a multilayer green body structure by adopting a tape casting method.
5. The above multi-layer green body structure was frozen at-18℃for 14 hours, and then dried at 100℃for 9 hours in a nitrogen atmosphere to obtain a fibrous gypsum composite material having a thickness of 1mm and a specification of 1 mm. Times.2 mm. Times.5 mm as an oil guiding portion of a heating element.
6. A graphite sheet having a thickness of 50 μm was compounded as a heat generating portion on the surface of the oil guiding portion, and baked at 190℃for 3 hours to obtain a heat generating body having an integrally molded structure.
Before baking, the graphite sheet is subjected to porous treatment, and cells are cut in the middle of the graphite sheet so as to better conduct oil, and meanwhile, the width and the length of the graphite sheet are adjusted to set the resistance of the heating element to be 0.8 ohm.
7. The saturated oil absorption of the above-mentioned heat-generating body was measured and found to be 0.20g.
8. The heating element is connected with the electrode, tobacco tar is dripped into the heating element, the heating element is electrified and heated to 200 ℃, the temperature is kept constant for 5 seconds for atomization, the atomization amount is calculated to be 0.17g according to the weight difference of the heating element before and after atomization, and the atomization efficiency is 0.17/0.20X100% = 85%.
Example 3:
the embodiment provides a heating element, which is prepared by the following steps:
1. crushing 20 parts of straw, 20 parts of bamboo chips and 60 parts of bagasse, sieving with a 600-mesh sieve, soaking in 15-percent calcium hydroxide aqueous solution for 3 months, drying, dehydrating, and ball-milling for 24 hours to obtain crude fibers.
2. Soaking the crude fiber in 15 mass percent calcium hydroxide aqueous solution for 1 month, ball milling for 4 hours at 130 ℃, suction filtering, washing and precipitating to be neutral to obtain wood fiber slurry.
3. According to the mass percentage, 70 percent of the wood fiber slurry and 30 percent of the gypsum compound are mixed, and then added into an ethanol water mixed solvent with the volume concentration of ethanol of 15 percent, so as to obtain the slurry with the solid content of 95 percent.
Wherein the gypsum compound comprises, by mass, 96 parts of dihydrate gypsum, 3.7 parts of silicate and 0.3 part of sodium carboxymethyl cellulose.
4. And preparing the slurry into a multilayer green body structure by adopting a tape casting method.
5. The above multi-layer green body structure was frozen at-18℃for 16 hours, and then dried at 100℃for 10 hours in a nitrogen atmosphere to obtain a fibrous gypsum composite material having a thickness of 1mm and a specification of 1 mm. Times.2 mm. Times.5 mm as an oil guiding portion of a heating element.
6. A graphite sheet having a thickness of 25 μm was compounded as a heat generating portion on the surface of the oil guiding portion, and baked at 200℃for 3 hours to obtain a heat generating body having an integrally molded structure.
Before baking, the graphite sheet is subjected to porous treatment, and cells are cut in the middle of the graphite sheet so as to better conduct oil, and meanwhile, the width and the length of the graphite sheet are adjusted to set the resistance of the heating element to be 1.0 ohm.
7. The saturated oil absorption of the above-mentioned heat-generating body was measured and found to be 0.25g.
8. The heating element is connected with the electrode, tobacco tar is dripped into the heating element, the heating element is electrified and heated to 200 ℃, the temperature is kept constant for 5 seconds for atomization, the atomization amount is calculated to be 0.22g according to the weight difference of the heating element before and after atomization, and the atomization efficiency is 0.22/0.25X100% = 88%.
Comparative example 1:
the heat-generating body of comparative example 1 was substantially the same as in example 1, except that: ceramic with a specification of 1mm×2mm×5mm and a porosity of 55% was used as the oil guide.
The ceramic preparation method of the oil guiding part of the heating element of comparative example 1 is as follows:
1. mixing 70 parts of diatomite, 30 parts of glass powder, 55 parts of polymethyl methacrylate (PMMA) with the particle size of 50 mu m, 40 parts of paraffin and 30 parts of stearic acid according to parts by weight, ball milling for 3 hours at the temperature of 60 ℃, and adding the mixture into an ethanol water mixed solvent with the ethanol volume concentration of 15% to obtain slurry with the solid content of 85 wt%;
2. and (3) carrying out injection molding on the slurry, carrying out low-temperature wax removal for 4 hours at the temperature of 280 ℃, and then sintering for 3 hours at the temperature of 1060 ℃ to obtain the ceramic with the porosity of 55%.
3. The saturated oil absorption of the above-mentioned heat-generating body was measured and found to be 0.14g.
The heating element is connected with the electrode, tobacco tar is dripped into the heating element, the heating element is electrified and heated to 200 ℃, the temperature is kept constant for 5 seconds for atomization, the atomization amount is calculated to be 0.1g according to the weight difference of the heating element before and after atomization, and the atomization efficiency is 0.1/0.14X100% = 71%.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in 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 (10)

1. The fibrous gypsum composite material is characterized in that the raw materials comprise 60-70% of wood fiber slurry and 30-40% of gypsum composite according to mass percent; the preparation of the wood fiber slurry comprises the following steps: crushing natural wood fiber raw materials, sieving, soaking in alkaline solution, drying, ball milling and preparing crude fibers; soaking the crude fiber in an alkaline solution, ball-milling, suction filtering, and washing to prepare the wood fiber slurry;
the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by weight;
the preparation method of the fiber gypsum composite material comprises the following steps:
mixing the lignocellulosic slurry, the gypsum composite, and a solvent to form a slurry;
preparing the slurry obtained by mixing into a multilayer green body structure by adopting a tape casting method;
and performing freeze drying treatment on the multilayer green body structure to obtain the fiber gypsum composite material.
2. The preparation method of the fiber gypsum composite material is characterized in that the raw materials of the fiber gypsum composite material comprise 60-70% of wood fiber slurry and 30-40% of gypsum composite according to mass percent; the gypsum compound comprises 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 part of sodium carboxymethyl cellulose according to parts by weight; the preparation of the wood fiber slurry comprises the following steps: crushing natural wood fiber raw materials, sieving, soaking in alkaline solution, drying, ball milling and preparing crude fibers; soaking the crude fiber in an alkaline solution, ball-milling, suction filtering, and washing to prepare the wood fiber slurry;
the preparation method of the fiber gypsum composite material comprises the following steps:
mixing the lignocellulosic slurry, the gypsum composite, and a solvent to form a slurry;
preparing the slurry obtained by mixing into a multilayer green body structure by adopting a tape casting method;
and performing freeze drying treatment on the multilayer green body structure to obtain the fiber gypsum composite material.
3. The method for preparing a fibrous gypsum composite material according to claim 2, wherein the solvent is an ethanol-water mixed solvent with an ethanol volume concentration of 10-15%, and the solid content of the slurry is 85-95 wt%; and/or
The conditions of the freeze-drying treatment include: freezing at-4 to-18 deg.c for 12-16 hr, and drying at 80-100 deg.c for 8-10 hr in inert gas environment.
4. The heating body is characterized by comprising an oil guide part and a heating part connected with the oil guide part, wherein the oil guide part is of a porous cavity structure made of the fiber gypsum composite material according to claim 1, the heating part is a graphite sheet, and the heating part and the oil guide part form an integrally formed structure.
5. A heat-generating body according to claim 4, wherein the graphite sheet has a thickness of 10 μm to 80 μm and the oil-guiding portion has a thickness of 1mm to 2mm.
6. A heat-generating body as described in claim 4, wherein the heat-generating portion and the oil-guiding portion form the integrally formed structure by:
and compounding the heating part on the surface of the oil guide part, and baking to prepare the integrally formed structure.
7. A heat-generating body as described in claim 6, wherein the baking temperature is 190℃to 200℃and the time is 2 hours to 4 hours.
8. A heat-generating body as described in claim 6, further comprising a step of cutting cells in the middle of said graphite sheet before baking.
9. A heat-generating body according to any one of claims 4 to 8, wherein the resistance of the heat-generating body is 0.8 to 1.4 ohms.
10. An electronic atomizer comprising a housing, an electrode and a heat generating body according to any one of claims 4 to 9, the electrode and the heat generating body being mounted in the housing, the electrode being electrically connected to a heat generating portion of the heat generating body.
CN202211000635.2A 2022-08-19 2022-08-19 Fibrous gypsum composite material, heating element and electronic atomizer Active CN115368096B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108840713A (en) * 2018-08-27 2018-11-20 安徽微威胶件集团有限公司 A kind of composite sound-absorbing material
CN210203364U (en) * 2019-02-27 2020-03-31 深圳市合元科技有限公司 Electronic cigarette atomizer and electronic cigarette
CN113349452A (en) * 2021-06-23 2021-09-07 深圳市华诚达精密工业有限公司 Integrated fiber heating atomization piece, preparation method thereof and atomization device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108840713A (en) * 2018-08-27 2018-11-20 安徽微威胶件集团有限公司 A kind of composite sound-absorbing material
CN210203364U (en) * 2019-02-27 2020-03-31 深圳市合元科技有限公司 Electronic cigarette atomizer and electronic cigarette
CN113349452A (en) * 2021-06-23 2021-09-07 深圳市华诚达精密工业有限公司 Integrated fiber heating atomization piece, preparation method thereof and atomization device

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