CN112895616A - Aerogel flexible sheet and preparation method thereof - Google Patents

Aerogel flexible sheet and preparation method thereof Download PDF

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Publication number
CN112895616A
CN112895616A CN202110146891.1A CN202110146891A CN112895616A CN 112895616 A CN112895616 A CN 112895616A CN 202110146891 A CN202110146891 A CN 202110146891A CN 112895616 A CN112895616 A CN 112895616A
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layer
flexible
flexible layer
aerogel
inorganic fiber
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朱全红
郑志成
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Dongguan Hongyi Thermal Conductmty Material Co ltd
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Dongguan Hongyi Thermal Conductmty Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/24—Layered products comprising a layer of synthetic resin characterised by the use of special additives using solvents or swelling agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Silicon Compounds (AREA)

Abstract

The invention discloses an aerogel flexible sheet and a preparation method thereof, wherein the preparation method comprises the following steps: preparing a mask coating on the upper surface of the substrate, wherein the mask coating is provided with a mask pattern; preparing a first flexible layer to cover the lower surface of the substrate; preparing an inorganic fiber net layer to cover the surface of the first flexible layer; preparing a second flexible layer to cover the surfaces of the first flexible layer and the inorganic fiber net layer; peeling the first flexible layer, the inorganic fiber net layer and the second flexible layer which correspond to the mask pattern from the substrate to form an aerogel flexible sheet; when the flexible layer is prepared, the reaction chamber of the oven is preheated for a period of time, then the irradiation is carried out in a mode of increasing irradiation energy in a stepped mode, and meanwhile, the air is extracted by the air extractor. The aerogel flexible layer prepared by the method has good flexibility and stability, and can well insulate heat and conduct heat.

Description

Aerogel flexible sheet and preparation method thereof
Technical Field
The invention relates to the field of heat insulation and directional heat conduction, in particular to an aerogel flexible sheet and a preparation method thereof.
Background
At present, with the development of electronic technology, the functions of electronic products are increasing day by day, the power consumption generated at the same time is larger and larger, and the corresponding heat generation amount is also larger and larger.
In the prior art, expensive laser equipment is often needed to irradiate the whole carrier plate for peeling the aerogel flexible sheet, the engineering time is long, the whole aerogel flexible sheet can only be peeled from the carrier plate or the peeling precision of the area is poor, the bending performance and the stability of the manufactured aerogel flexible sheet are insufficient, the thermal conductivity is low, and the current heat insulation requirement cannot be met.
Disclosure of Invention
In order to solve the problems, the invention provides an aerogel flexible sheet and a preparation method thereof, and the specific technical scheme is as follows:
an aerogel flexible sheet, comprising:
the carrier plate is provided with an upper surface and a lower surface which are opposite;
the mask coating is covered on the upper surface of the carrier plate and is provided with a mask pattern;
the first flexible layer is covered on the lower surface of the carrier plate;
the inorganic fiber net layer is covered on the surface of the first flexible layer;
and the second flexible layer is covered on the surfaces of the first flexible layer and the inorganic fiber net layer.
In addition, the application also provides a preparation method of the aerogel flexible sheet, which comprises the following steps:
s10, preparing a mask coating on the upper surface of the carrier plate, wherein the mask coating is provided with a mask pattern;
s20, preparing a first flexible layer on the lower surface of the carrier plate, wherein in a reaction chamber of an oven, when the first flexible layer is prepared from a polymer, a polymer solution is prepared and coated on the lower surface of the carrier plate, and then the polymer solution is subjected to light irradiation treatment to obtain the first flexible layer;
s30, preparing an inorganic fiber net layer on the first flexible surface;
s40, preparing a second flexible layer on the first flexible layer, and covering the inorganic fiber mesh layer, wherein in the reaction chamber of the oven, when the second flexible layer is prepared from the polymer, the polymer solution is prepared, and coated on the surfaces of the first flexible layer and the inorganic fiber mesh layer, and then the polymer solution is subjected to light irradiation treatment to obtain the second flexible layer;
s50, peeling the first flexible layer, the inorganic fiber net layer and the second flexible layer corresponding to the mask pattern from the support plate to form an aerogel flexible sheet;
when carrying out the light irradiation and handling, in the reacting chamber of oven, preheat a period earlier, then adopt cascaded increase irradiation energy's mode to shine, adopt air exhaust device to bleed simultaneously.
Further, the preheating period is as follows: preheated at 80 ℃ for 2 hours.
Further, the irradiation energy is increased stepwise in such a manner that the irradiation energy is increased stepwise, and after irradiation at a temperature for 10 minutes, the irradiation energy is increased to be irradiated at the temperature for 10 minutes, and the irradiation energy is sequentially increased stepwise, and the maximum irradiation energy corresponds to the thermal decomposition temperature Tg of the polymer.
Further, the thickness of the first flexible layer and the second flexible layer is 400 nm-600 nm, and the thickness of the inorganic fiber net layer is 100 nm-150 nm.
Further, peeling off the first flexible layer, the inorganic fiber web layer, and the second flexible layer corresponding to the mask pattern from the carrier sheet includes: the mask pattern corresponds to a non-display area of the aerogel flexible sheet, and a part of the mask coating layer, from which the mask pattern is removed, corresponds to a display area of the aerogel flexible sheet; or the mask pattern corresponds to the display area of the aerogel flexible sheet.
Further, the mask pattern is a circular, square, triangular or irregular pattern.
Furthermore, the aerogel flexible sheet further comprises a water-oxygen barrier layer covering the second flexible layer, so that water and oxygen in the air are prevented from permeating into the aerogel flexible sheet to influence the performance of the aerogel flexible sheet.
Furthermore, the aerogel flexible sheet also comprises a protective layer which is made of polydimethylsiloxane and covers the water oxygen barrier layer, so that the mechanical strength, flexibility, corrosion resistance and moisture resistance of the aerogel flexible sheet are improved.
Compared with the prior art, the invention at least has the following technical effects:
1) compared with the traditional aerogel flexible sheet, the aerogel flexible sheet provided by the invention has the advantages that the flexibility and the stability of the aerogel flexible sheet are improved by adding the inorganic fiber net layer, and the aerogel flexible sheet in any shape can be peeled by adding the mask coating.
2) According to the preparation method of the aerogel flexible sheet, provided by the invention, no additional expensive equipment is needed, and only the air extractor is arranged on the original oven equipment, wherein the air extractor discharges the organic solvent volatilized in the polymer film forming process outwards at a certain speed, so that the organic solvent is prevented from being retained in the reaction chamber to generate other reactions, and the performance of the aerogel flexible sheet is prevented from being influenced, and thus the aerogel flexible sheet with excellent heat insulation and heat conduction performance can be prepared on the support plate.
Drawings
FIG. 1 is a flow diagram of the present application of a method of making an aerogel flexible sheet;
FIG. 2 is a schematic structural diagram of an aerogel flexible sheet according to a first embodiment of the present disclosure;
FIG. 3 is a schematic structural view of an aerogel flexible sheet according to example two of the present application;
FIG. 4 is a schematic structural view of an aerogel flexible sheet according to example III of the present application;
FIG. 5 is a schematic structural view of an aerogel flexible sheet according to example four of the present application;
FIG. 6 is a schematic structural view of an aerogel flexible sheet according to example five of the present application;
101-a carrier plate; 102-a mask coating; 103-a first flexible layer; 104-inorganic fiber layer; 105-a second flexible layer; 106-water oxygen barrier layer; 107-protective layer; 108-a graphene heat sink layer; 109-mesh copper foil heat sink layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The first embodiment is as follows:
as shown in fig. 1 and 2, an aerogel flexible sheet includes:
a carrier plate 101 having an upper surface and a lower surface opposite to each other, and made of glass;
the mask coating 102 covers the upper surface of the carrier plate 101, the mask coating is provided with a mask pattern, the mask coating is formed on the first surface of the carrier plate 101 in a chemical vapor deposition or atomic layer deposition mode through a mask plate, and the mask pattern is a circular, square, triangular or irregular pattern.
The first flexible layer 103 covers the lower surface of the carrier plate 101;
an inorganic fiber net layer 104 covering the surface of the first flexible layer 103;
and the second flexible layer 105 is covered on the surfaces of the first flexible layer 103 and the inorganic fiber net layer 104.
The preparation method of the aerogel flexible sheet comprises the following steps:
s10, preparing a mask coating 102 on the upper surface of the carrier plate 101, wherein the mask coating is provided with a mask pattern;
s20, preparing the first flexible layer 103 on the lower surface of the carrier 101, wherein when preparing the first flexible layer 103 from a polymer in the reaction chamber of the oven, a polymer solution is prepared first, and coated on the lower surface of the carrier 101, and then the polymer solution is irradiated by light to obtain the first flexible layer 103, wherein the polymer is any one of polyethylene terephthalate, polyethylene naphthalate, polycarbonate and polyimide, the Polyimide (PI) material has the best temperature resistance, therefore, using Polyimide (PI), first, a PI solution (hereinafter, PI solution is described as an example) with a mass percentage of 10-20% is prepared, wherein the organic solvent is selected from DMSO (dimethyl sulfoxide) or DMAC (dimethylacetamide), then, coating the PI solution on the lower surface of the carrier plate 101 by a Spin coating method (Spin), a blade coating method or a screen printing method;
s30, preparing an inorganic fiber mesh layer 104 on the surface of the first flexible layer 103;
s40, preparing a second flexible layer 105 on the first flexible layer 103, and covering the inorganic fiber mesh layer 104, wherein in a reaction chamber of the oven, when preparing the second flexible layer 105 from polyimide, a polyimide solution is prepared, coated on the surfaces of the first flexible layer 103 and the inorganic fiber mesh layer 104, and then the polyimide solution is subjected to light irradiation treatment to obtain the second flexible layer 105;
s50, peeling the first flexible layer 103, the inorganic fiber mesh layer 104 and the second flexible layer 105 corresponding to the mask pattern from the carrier 101 to form an aerogel flexible sheet, which includes: the mask pattern corresponds to the non-display area of the aerogel flexible sheet, and the part of the mask coating layer 102, from which the mask pattern is removed, corresponds to the display area of the aerogel flexible sheet; or the mask pattern corresponds to the display area of the aerogel flexible sheet;
when carrying out the light irradiation and handling, in the reacting chamber of oven, preheat a period earlier, then adopt cascaded increase irradiation energy's mode to shine, adopt air exhaust device to bleed simultaneously.
Preferably, the preheating period is: preheating for 2 hours at the temperature of 80 ℃, wherein the preheating is used for preventing the organic solvent from being insufficiently volatilized due to overhigh initial temperature, so that the heat insulation function of the flexible aerogel flexible sheet is influenced.
Preferably, the irradiation energy is increased stepwise by increasing the irradiation energy stepwise, and after the irradiation at a temperature of 80 ℃ for 10 minutes, the irradiation energy is increased to irradiate at the temperature for 10 minutes, and the irradiation energy is increased stepwise in sequence, and the highest irradiation energy corresponds to a thermal decomposition temperature of the polyimide of 350 ℃ or higher.
Preferably, the thickness of the first flexible layer and the second flexible layer is 400 nm to 600 nm, and the thickness of the inorganic fiber net layer 104 is 100 nm to 150 nm, so that the aerogel flexible sheet manufactured by the thickness is light and thin, and has good and stable bendability.
The embodiment has at least the following technical effects: compare traditional aerogel flexible sheet, through increasing inorganic fiber net layer 104, the flexible nature of aerogel flexible sheet has been increased, stability and thermal-insulated heat conductivility, increase the mask coating, make can peel off arbitrary shape aerogel flexible sheet, and the preparation method of this application need not additionally add high-priced equipment, only set up air exhaust device on original oven equipment, wherein air exhaust device outwards discharges the volatile organic solvent of polymer film forming in-process according to certain speed, prevented that organic solvent from being detained and producing other reactions in the reacting chamber, influence the performance of aerogel flexible sheet, just so can prepare thermal-insulated heat conductivility's aerogel flexible sheet on the support plate.
Example two:
as shown in fig. 3, different from the first embodiment, in this embodiment, a water oxygen isolation layer 106 is further disposed on the second flexible layer according to the preparation method of the first embodiment, wherein the water oxygen isolation layer 106 is an aluminum plastic film for preventing water and oxygen in the air from penetrating into the aerogel flexible sheet.
Example three:
as shown in fig. 4, unlike the second embodiment, the outer surface of the water oxygen barrier layer 106 of the present embodiment is further provided with a protective layer 107, and the protective layer 107 is made of polydimethylsiloxane, so as to increase the mechanical strength, flexibility, corrosion resistance and moisture resistance of the aerogel flexible sheet.
Example four:
as shown in fig. 5, different from the second embodiment, the outer surface of the water oxygen insulating layer 106 of the second embodiment is further provided with a graphene heat dissipation layer 108, and the thermal conductivity of the graphene heat dissipation layer 108 is 2500-3000W/m · K; because of graphite alkene possesses excellent heat conduction heat dispersion, can further improve the heat conduction heat dispersion of the flexible piece of aerogel like this.
Example five:
as shown in fig. 6, unlike the second embodiment, the outer surface of the water oxygen barrier layer 106 of the second embodiment is further provided with a mesh copper foil heat dissipation layer 109, the porosity of the mesh copper foil is 55 to 65%, and the pore size of the mesh copper foil is 0.01 to 1mm, preferably 0.05 to 0.1 mm. Toughness and heat conduction heat dispersion that can further improve the flexible piece of aerogel like this.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (9)

1. The preparation method of the aerogel flexible sheet is characterized by comprising the following steps of:
s10, preparing a mask coating on the upper surface of the carrier plate, wherein the mask coating is provided with a mask pattern;
s20, preparing a first flexible layer on the lower surface of the carrier plate, wherein in a reaction chamber of an oven, when the first flexible layer is prepared from a polymer, a polymer solution is prepared and coated on the lower surface of the carrier plate, and then the polymer solution is subjected to light irradiation treatment to obtain the first flexible layer;
s30, preparing an inorganic fiber net layer on the surface of the first flexible layer;
s40, preparing a second flexible layer on the first flexible layer and covering the inorganic fiber mesh layer, wherein in the reaction chamber of the oven, when the second flexible layer is prepared from the polymer, the polymer solution is prepared and coated on the surfaces of the first flexible layer and the inorganic fiber mesh layer, and then the polymer solution is subjected to light irradiation treatment to obtain the second flexible layer;
s50, peeling the first flexible layer, the inorganic fiber net layer and the second flexible layer corresponding to the mask pattern from the support plate to form an aerogel flexible sheet;
when the light irradiation treatment is carried out, the reaction chamber of the oven is preheated for a period of time, then the irradiation is carried out by adopting a mode of increasing irradiation energy in a stepped manner, and meanwhile, the air exhaust device is adopted for exhausting air.
2. The method of claim 1, wherein the preheating is for a period of time of: preheated at 80 ℃ for 2 hours.
3. The production method according to claim 1, wherein the irradiation energy is increased stepwise by increasing the irradiation energy stepwise, irradiating for 10 minutes at a temperature, then increasing the irradiation energy and irradiating for 10 minutes at the temperature, and sequentially increasing the irradiation energy stepwise, and the maximum irradiation energy corresponds to the thermal decomposition temperature Tg of the polymer.
4. The method of claim 1, wherein the first flexible layer and the second flexible layer have a thickness of 400 nm to 600 nm, and the inorganic fiber web layer has a thickness of 100 nm to 150 nm.
5. The manufacturing method according to claim 1, wherein peeling off the first flexible layer, the inorganic fiber web layer, and the second flexible layer from the carrier sheet at portions corresponding to the mask patterns comprises: the mask pattern corresponds to a non-display area of the aerogel flexible sheet, and a part of the mask coating layer, from which the mask pattern is removed, corresponds to a display area of the aerogel flexible sheet; or the mask pattern corresponds to the display area of the aerogel flexible sheet.
6. An aerogel flexible sheet, comprising:
the carrier plate is provided with an upper surface and a lower surface which are opposite;
the mask coating is covered on the upper surface of the carrier plate and is provided with a mask pattern;
the first flexible layer is covered on the lower surface of the carrier plate;
the inorganic fiber net layer is covered on the surface of the first flexible layer;
and the second flexible layer is covered on the surfaces of the first flexible layer and the inorganic fiber net layer.
7. An aerogel flexible sheet according to claim 6, wherein the mask pattern is circular, square, triangular, or irregular.
8. The aerogel flexible sheet of claim 6, further comprising a water oxygen barrier layer overlying the second flexible layer.
9. The aerogel flexible sheet of claim 8, further comprising a protective layer made of polydimethylsiloxane coated on the water oxygen barrier layer.
CN202110146891.1A 2021-02-03 2021-02-03 Aerogel flexible sheet and preparation method thereof Pending CN112895616A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024017A (en) * 2014-04-29 2015-11-04 Tcl集团股份有限公司 Flexible substrate, flexible display and manufacturing method thereof
CN111653690A (en) * 2020-06-18 2020-09-11 京东方科技集团股份有限公司 Flexible display substrate, preparation method thereof and flexible display panel
CN112071796A (en) * 2020-09-03 2020-12-11 深圳市华星光电半导体显示技术有限公司 Flexible substrate, manufacturing method thereof and flexible display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024017A (en) * 2014-04-29 2015-11-04 Tcl集团股份有限公司 Flexible substrate, flexible display and manufacturing method thereof
CN111653690A (en) * 2020-06-18 2020-09-11 京东方科技集团股份有限公司 Flexible display substrate, preparation method thereof and flexible display panel
CN112071796A (en) * 2020-09-03 2020-12-11 深圳市华星光电半导体显示技术有限公司 Flexible substrate, manufacturing method thereof and flexible display device

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