HEAT INSULATION AND PRESERVATION COMPOSITE BOARD AND PREPARATION METHOD THEREOF

Abstract

A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is a fiber-reinforced resin-based composite sheet, a metal plate, a cement plate, a calcium silicate plate, or a gypsum plate. The heat insulation and preservation layer is a fiber-reinforced aerogel felt. A preparation method of the heat insulation and preservation composite board includes: (1) laying the fiber-reinforced aerogel felt flat; (2) laying the first panel layer flat on the upper surface of the fiber-reinforced aerogel felt; (3) performing a hot-press molding process to obtain the heat insulation and preservation composite board.

Claims

1. A heat insulation and preservation composite board, comprising a first panel layer and a heat insulation and preservation layer, wherein the heat insulation and preservation layer and the first panel layer are integrally formed; the first panel layer is selected from the group consisting of a fiber-reinforced resin-based composite sheet, a metal plate, a cement plate, a calcium silicate plate, and a gypsum plate; and the heat insulation and preservation layer is a fiber-reinforced aerogel felt; in a case that the first panel layer is the fiber-reinforced resin-based composite sheet, a surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer is coated or uncoated with a heat insulation coating; in a case that the first panel layer is selected from the group consisting of the metal plate, the cement plate, the calcium silicate plate, and the gypsum plate, the surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer is coated with the heat insulation coating; the heat insulation coating consists of a liquid epoxy resin, a heat insulation filler, a curing agent, an enhancer, and a first coupling agent in a mass ratio of 100:(10-50):(20-180):(0.05-3):(0.2-5), or the heat insulation coating consists of an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of (30-60):(10-30):(2-5):(5-40):(0.5-5):(1-5).

2. The heat insulation and preservation composite board of claim 1, further comprising a second panel layer, wherein the heat insulation and preservation layer is located between the first panel layer and the second panel layer; the heat insulation and preservation layer and the second panel layer are also integrally formed; the second panel layer is an additional fiber-reinforced resin-based composite sheet, and the surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer and another surface of the fiber-reinforced aerogel felt which is in contact with the second panel layer are each coated or uncoated with the heat insulation coating.

3. The heat insulation and preservation composite board of claim 2, wherein in a case that the fiber-reinforced aerogel felt is uncoated with the heat insulation coating, the fiber-reinforced aerogel felt is externally and directly wrapped by an aluminum foil; in a case that the fiber-reinforced aerogel felt is coated with the heat insulation coating, the fiber-reinforced aerogel felt is externally wrapped by the aluminum foil after being coated with the heat insulation coating; and a bonding agent or a double faced adhesive tape is provided between the aluminum foil and the first panel layer or between the aluminum foil and the second panel layer.

4. The heat insulation and preservation composite board of claim 1, wherein the heat insulation coating is replaced by a double faced adhesive tape.

5. The heat insulation and preservation composite board of claim 1, wherein fibers of the fiber-reinforced resin-based composite sheet are selected from the group consisting of glass fibers, carbon fibers, quartz fibers, high silica fibers, aluminum silicate fibers, mullite fibers, silicon carbide fibers, silicon nitride fibers, aluminum oxide fibers, boron nitride fibers, basalt fibers, brucite fibers, attapulgite fibers, boron fibers, carbon nanotubes, aramid fibers, polyimide fibers, and ultra-high molecular weight polyethylene fibers, and a resin of the fiber-reinforced resin-based composite sheet is selected from the group consisting of an epoxy resin, a phenolic resin, a benzoxazine resin, an unsaturated polyester, a vinyl ester resin, a silicon resin, and a cyanate resin.

6. A method for preparing the heat insulation and preservation composite board of claim 1, comprising: (1) laying the fiber-reinforced aerogel felt flat; (2) laying the first panel layer flat on the surface of the fiber-reinforced aerogel felt to be in contact with the first panel layer; in a case that the first panel layer is the fiber-reinforced resin-based composite sheet, and that the surface of the fiber-reinforced aerogel felt to be in contact with the first panel layer is coated with the heat insulation coating, the first panel layer in this step is directly the fiber-reinforced resin-based composite sheet or is replaced by a fiber-reinforced resin-based pre-preg tape corresponding to the fiber-reinforced resin-based composite sheet; in a case that the first panel layer is the fiber-reinforced resin-based composite sheet, and that the surface of the fiber-reinforced aerogel felt to be in contact with the first panel layer is uncoated with the heat insulation coating, the first panel layer in this step is replaced by a fiber-reinforced resin-based pre-preg tape corresponding to the fiber-reinforced resin-based composite sheet; (3) performing a hot-press molding process to obtain the heat insulation and preservation composite board.

7. The method of claim 6, wherein the heat insulation and preservation composite board further comprises a second panel layer; the heat insulation and preservation layer is located between the first panel layer and the second panel layer; the heat insulation and preservation layer and the second panel layer are also integrally formed; the second panel layer is an additional fiber-reinforced resin-based composite sheet; the surface of the fiber-reinforced aerogel felt which is in contact with the first panel layer and another surface of the fiber-reinforced aerogel felt which is in contact with the second panel layer are each coated or uncoated with the heat insulation coating; and the corresponding step (2) comprises: laying the first panel layer and the second panel layer flat on the surfaces of the fiber-reinforced aerogel felt to be in contact therewith, respectively; in a case that the first panel layer and the second panel layer are the fiber-reinforced resin-based composite sheets, and that the surfaces of the fiber-reinforced aerogel felt to be respectively in contact with the first panel layer and the second panel layer are each coated with the heat insulation coating, the first panel layer and the second panel layer in this step are directly the fiber-reinforced resin-based composite sheets or are replaced by fiber-reinforced resin-based pre-preg tapes corresponding to the fiber-reinforced resin-based composite sheets; in a case that the first panel layer and the second panel layer are the fiber-reinforced resin-based composite sheets, and that the surfaces of the fiber-reinforced aerogel felt to be respectively in contact with the first panel layer and the second panel layer are each uncoated with the heat insulation coating, the first panel layer and the second panel layer in this step are replaced by fiber-reinforced resin-based pre-preg tapes corresponding to the fiber-reinforced resin-based composite sheets; and in a case that the first panel layer is the metal plate, the cement plate, the calcium silicate plate, or the gypsum plate, that the second panel layer is the fiber-reinforced resin-based composite sheet, and that the surfaces of the fiber-reinforced aerogel felt to be respectively in contact with the first panel layer and the second panel layer are each coated with the heat insulation coating, the second panel layer in this step is directly the additional fiber-reinforced resin-based composite sheet or is replaced by the fiber-reinforced resin-based pre-preg tape corresponding to the additional fiber-reinforced resin-based composite sheet.

8. The method of claim 6, wherein the fiber-reinforced aerogel felt is externally and directly wrapped by an aluminum foil in a case that the fiber-reinforced aerogel felt is uncoated with the heat insulation coating; the fiber-reinforced aerogel felt is externally wrapped by an aluminum foil after being coated with the heat insulation coating in a case that the fiber-reinforced aerogel felt is coated with the heat insulation coating.

9. The method of claim 6, wherein the heat insulation coating is replaced by a double faced adhesive tape.

10. The method of claim 6, wherein a temperature of the hot-press molding process is 50° C. to 150° C. and a pressure of the hot-press molding process is 0.5 MPa to 5 MPa.

11. The heat insulation and preservation composite board of claim 1, wherein fibers of the fiber-reinforced aerogel felt are selected from the group consisting of glass fibers, carbon fibers, quartz fibers, high silica fibers, aluminum silicate fibers, mullite fibers, silicon carbide fibers, silicon nitride fibers, aluminum oxide fibers, boron nitride fibers, basalt fibers, brucite fibers, attapulgite fibers, boron fibers, carbon nanotubes, aramid fibers, polyimide fibers, and ultra-high molecular weight polyethylene fibers; and an aerogel of the fiber-reinforced aerogel felt is selected from the group consisting of a silicon dioxide aerogel, a carbon aerogel, an aluminum oxide aerogel, a zirconium oxide aerogel, a titanium oxide aerogel, an iron oxide aerogel, a cobalt oxide aerogel, a nickel oxide aerogel, a copper oxide aerogel, a yttrium oxide aerogel, a cerium oxide aerogel, a vanadium oxide aerogel, a bismuth oxide aerogel, a tin oxide aerogel, a resorcinol formaldehyde aerogel, and a graphene aerogel.

12. The heat insulation and preservation composite board of claim 1, wherein the liquid epoxy resin is selected from the group consisting of epoxy resin E51, epoxy resin E44, and a combination thereof.

13. The heat insulation and preservation composite board of claim 1, wherein the heat insulation filler is selected from the group consisting of titanium dioxide particles, zinc oxide particles, hollow glass microbeads, hollow silicon dioxide microbeads, hollow phenolic resin microspheres, hollow ceramic microspheres, and a combination thereof.

14. The heat insulation and preservation composite board of claim 1, wherein the curing agent is selected from the group consisting of imidazole, dicyandiamide, triethylene diamine, triethylene tetramine, and a combination thereof.

15. The heat insulation and preservation composite board of claim 1, wherein the enhancer is selected from the group consisting of organic urea UR300 and organic urea UR500.

16. The heat insulation and preservation composite board of claim 1, wherein the first coupling agent is a silane coupling agent.

17. The heat insulation and preservation composite board of claim 1, wherein the aqueous elastic paint is selected from the group consisting of an aqueous ethylene-vinyl acetate elastic paint, an aqueous organosilicone-acrylate elastic paint, an aqueous acrylic elastic paint, and an aqueous rubber emulsion, and the aqueous resin is selected from the group consisting of an aqueous epoxy resin, an aqueous polyurea resin, an aqueous phenolic resin, and an aqueous polyurethane resin.

18. The heat insulation and preservation composite board of claim 1, wherein the flame retardant is selected from the group consisting of a phosphorus-nitrogen flame retardant, an inorganic flame retardant, DOPO, decabromodiphenyl ether, decabromodiphenyl ethane, and a combination thereof.

19. The heat insulation and preservation composite board of claim 1, wherein the dispersing agent is selected from the group consisting of BYK-161, BYK-163, and BYK-2000.

20. The heat insulation and preservation composite board of claim 1, wherein the second coupling agent is selected from the group consisting of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, and a borate coupling agent.

Description

DETAILED DESCRIPTION

[0043] The present disclosure will now be described in detail with reference to the specific examples. It should be understood that the following examples are only for illustrating the present disclosure, and not intended to limit the scope of the present disclosure.

Example 1

[0044] A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is a glass-fiber-reinforced epoxy-resin-based composite sheet. The heat insulation and preservation layer is a glass-fiber-reinforced silicon dioxide aerogel felt.

[0045] A method for preparing the heat insulation and preservation composite board includes:

[0046] (1) laying the glass-fiber-reinforced silicon dioxide aerogel felt flat;

[0047] (2) laying a glass-fiber-reinforced epoxy-resin-based pre-preg tape corresponding to the first panel layer flat on an upper surface of the glass-fiber-reinforced silicon dioxide aerogel felt flat; and

[0048] (3) performing a hot-press molding process at a temperature of 140° C. and a pressure of 2 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 2

[0049] A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is a glass-fiber-reinforced epoxy-resin-based composite sheet. The heat insulation and preservation layer is a glass-fiber-reinforced silicon dioxide aerogel felt.

[0050] A method for preparing the heat insulation and preservation composite board includes:

[0051] (1) laying the glass-fiber-reinforced silicon dioxide aerogel felt flat;

[0052] (2) laying the glass-fiber-reinforced epoxy-resin-based composite sheet as the first panel layer flat on an upper surface of the glass-fiber-reinforced silicon dioxide aerogel felt, and attaching a double faced adhesive tape onto the surface of the glass-fiber-reinforced silicon dioxide aerogel felt which is in contact with the glass-fiber-reinforced epoxy-resin-based composite sheet so as to bond them; and

[0053] (3) performing a hot-press molding process at a temperature of 60° C. and a pressure of 0.5 Mpa, thereby obtaining the heat insulation and preservation composite board.

Example 3

[0054] A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is a cabon-fiber-reinforced phenolic-resin-based composite sheet. The heat insulation and preservation layer is an aluminum-silicate-fiber-reinforced silicon dioxide aerogel felt.

[0055] A method for preparing the heat insulation and preservation composite board includes:

[0056] (1) laying the aluminum-silicate-fiber-reinforced silicon dioxide aerogel felt flat, mixing an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of 40:20:3:15:1:2 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface of the aluminum-silicate-fiber-reinforced silicon dioxide aerogel felt; the aqueous elastic paint is an aqueous ethylene-vinyl acetate elastic paint, the aqueous resin is an aqueous epoxy resin, the flame retardant is ammonium polyphosphate, the dispersing agent is BYK-161, and the second coupling agent is a silane coupling agent;

[0057] (2) laying the cabon-fiber-reinforced phenolic-resin-based composite sheet as the first panel layer flat on the upper surface of the aluminum-silicate-fiber-reinforced silicon dioxide aerogel felt which is coated with the heat insulation slurry; and

[0058] (3) performing a hot-press molding process at a temperature of 120° C. and a pressure of 1.5 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 4

[0059] A heat insulation and preservation composite board includes a first panel layer, a heat insulation and preservation layer, and a second panel layer. The heat insulation and preservation layer is located between the first panel layer and the second panel layer. The heat insulation and preservation layer and the first panel layer are integrally formed, and the heat insulation and preservation layer and the second panel layer are integrally formed. The first panel layer is a metal plate. The second panel layer is a glass-fiber-reinforced unsaturated-polyester-based composite sheet. The heat insulation and preservation layer is a glass-fiber-reinforced silicon dioxide aerogel felt.

[0060] A method for preparing the heat insulation and preservation composite board includes:

[0061] (1) laying the glass-fiber-reinforced silicon dioxide aerogel felt flat;

[0062] (2) laying the metal plate as the first panel layer and the glass-fiber-reinforced unsaturated-polyester-based composite sheet as the second panel layer flat on an upper surface and a lower surface of the glass-fiber-reinforced silicon dioxide aerogel felt, respectively, wherein a double faced adhesive tape is attached to each of the upper surface and the lower surface of the glass-fiber-reinforced silicon dioxide aerogel felt, so that the glass-fiber-reinforced silicon dioxide aerogel felt is bound to the metal plate as the first panel layer and to the glass-fiber-reinforced unsaturated-polyester-based composite sheet as the second panel layer; and

[0063] (3) performing a hot-press molding process at a temperature of 50° C. and a pressure of 4 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 5

[0064] A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is an aramid-fiber-reinforced epoxy-resin-based composite sheet. The heat insulation and preservation layer is a mullite-fiber-reinforced zirconium oxide aerogel felt. A surface of the mullite-fiber-reinforced zirconium oxide aerogel felt which is in contact with the first panel layer is coated with a heat insulation coating.

[0065] A method for preparing the heat insulation and preservation composite board includes:

[0066] (1) laying the mullite-fiber-reinforced zirconium oxide aerogel felt flat, mixing an liquid epoxy resin, a heat insulation filler, a curing agent, an enhancer, and a first coupling agent in a mass ratio of 100:20:50:0.1:1 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface of the mullite-fiber-reinforced zirconium oxide aerogel felt; the liquid epoxy resin is epoxy resin E51, the heat insulation filler is hollow glass microbeads, the curing agent is dicyandiamide, the enhancer is organic urea UR300, and the first coupling agent is a silane coupling agent;

[0067] (2) laying the aramid-fiber-reinforced epoxy-resin-based composite sheet as the first panel layer flat on the upper surface of the mullite-fiber-reinforced zirconium oxide aerogel felt which is coated with the heat insulation slurry; and

[0068] (3) performing a hot-press molding process at a temperature of 100° C. and a pressure of 2 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 6

[0069] A heat insulation and preservation composite board includes a first panel layer, a heat insulation and preservation layer, and a second panel layer. The heat insulation and preservation layer is located between the first panel layer and the second panel layer. The heat insulation and preservation layer and the first panel layer are integrally formed, and the heat insulation and preservation layer and the second panel layer are integrally formed. The first panel layer is a calcium silicate plate. The second panel layer is a quartz-fiber-reinforced vinyl-ester-resin-based composite sheet. The heat insulation and preservation layer is a glass-fiber-reinforced aluminum oxide aerogel felt. The surfaces of the glass-fiber-reinforced aluminum oxide aerogel felt which are in contact with the first panel layer and the second panel layer are coated with heat insulation coatings.

[0070] A method for preparing the heat insulation and preservation composite board includes:

[0071] (1) laying the glass-fiber-reinforced aluminum oxide aerogel felt flat, mixing an liquid epoxy resin, a heat insulation filler, a curing agent, an enhancer, and a first coupling agent in a mass ratio of 100:40:80:2:3 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface and a lower surface of the glass-fiber-reinforced aluminum oxide aerogel felt; the liquid epoxy resin is epoxy resin E44, the heat insulation filler is hollow ceramic microspheres, the curing agent is triethylene diamine, the enhancer is organic urea UR500, and the first coupling agent is a silane coupling agent;

[0072] (2) laying the calcium silicate plate as the first panel layer and the quartz-fiber-reinforced vinyl-ester-resin-based composite sheet as the second panel layer flat on the upper surface and the lower surface of the glass-fiber-reinforced aluminum oxide aerogel felt which are coated with the heat insulation slurry, respectively; and

[0073] (3) performing a hot-press molding process at a temperature of 110° C. and a pressure of 3 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 7

[0074] A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is an aluminum-oxide-fiber-reinforced cyanate-resin-based composite sheet. The heat insulation and preservation layer is a high-silica-fiber-reinforced titanium oxide aerogel felt. A surface of the high-silica-fiber-reinforced titanium oxide aerogel felt which is in contact with the first panel layer is coated with a heat insulation coating.

[0075] A method for preparing the heat insulation and preservation composite board includes:

[0076] (1) laying the high-silica-fiber-reinforced titanium oxide aerogel felt flat, mixing an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of 50:25:4:35:3:4 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface of the high-silica-fiber-reinforced titanium oxide aerogel felt; the aqueous elastic paint is an aqueous acrylic elastic paint, the aqueous resin is an aqueous phenolic resin, the flame retardant is magnesium hydroxide, the dispersing agent is BYK-2000, and the second coupling agent is a titanate coupling agent;

[0077] (2) laying the aluminum-oxide-fiber-reinforced cyanate-resin-based composite sheet as the first panel layer flat on the upper surface of the high-silica-fiber-reinforced titanium oxide aerogel felt which is coated with the heat insulation slurry; and

[0078] (3) performing a hot-press molding process at a temperature of 100° C. and a pressure of 0.5 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 8

[0079] A heat insulation and preservation composite board includes a first panel layer, a heat insulation and preservation layer, and a second panel layer. The heat insulation and preservation layer is located between the first panel layer and the second panel layer. The heat insulation and preservation layer and the first panel layer are integrally formed, and the heat insulation and preservation layer and the second panel layer are integrally formed. The first panel layer is a cement plate. The second panel layer is a quartz-fiber-reinforced phenolic-resin-based composite sheet. The heat insulation and preservation layer is a boron-fiber-reinforced graphene aerogel felt. The surfaces of the boron-fiber-reinforced graphene aerogel felt which are in contact with the first panel layer and the second panel layer are coated with heat insulation coatings.

[0080] A method for preparing the heat insulation and preservation composite board includes:

[0081] (1) laying the boron-fiber-reinforced graphene aerogel felt flat, mixing an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of 55:30:5:40:3:5 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface and a lower surface of the boron-fiber-reinforced graphene aerogel felt; the aqueous elastic paint is an aqueous rubber emulsion, the aqueous resin is an aqueous polyurethane resin, the flame retardant is DOPO, the dispersing agent is BYK-161, and the second coupling agent is a borate coupling agent;

[0082] (2) laying the cement plate as the first panel layer and the quartz-fiber-reinforced phenolic-resin-based composite sheet as the second panel layer flat on the upper surface and the lower surface of the boron-fiber-reinforced graphene aerogel felt which are coated with the heat insulation slurry, respectively; and

[0083] (3) performing a hot-press molding process at a temperature of 110° C. and a pressure of 1 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 9

[0084] A heat insulation and preservation composite board includes a first panel layer, a heat insulation and preservation layer, and a second panel layer. The heat insulation and preservation layer is located between the first panel layer and the second panel layer. The heat insulation and preservation layer and the first panel layer are integrally formed, and the heat insulation and preservation layer and the second panel layer are integrally formed. The first panel layer is a glass-fiber-reinforced cyanate-resin-based composite sheet. The second panel layer is a glass-fiber-reinforced epoxy-resin-based composite sheet. The heat insulation and preservation layer is a glass-fiber-reinforced graphene aerogel felt. The surfaces of the glass-fiber-reinforced graphene aerogel felt which are in contact with the first panel layer and the second panel layer are coated with heat insulation coatings. After being coated with the heat insulation coatings, the glass-fiber-reinforced graphene aerogel felt is externally wrapped by an aluminum foil. A bonding agent is provided between the aluminum foil and the first panel layer and between the aluminum foil and the second panel layer.

[0085] A method for preparing the heat insulation and preservation composite board includes:

[0086] (1) laying the glass-fiber-reinforced graphene aerogel felt flat, mixing an liquid epoxy resin, a heat insulation filler, a curing agent, an enhancer, and a first coupling agent in a mass ratio of 100:20:90:2:3 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface and a lower surface of the glass-fiber-reinforced graphene aerogel felt, and wrapping the aluminum foil around the glass-fiber-reinforced graphene aerogel felt after the glass-fiber-reinforced graphene aerogel felt is coated with the heat insulation slurry, applying the bonding agent on each of an upper surface and a lower surface of the aluminum foil; the liquid epoxy resin is epoxy resin E51, the heat insulation filler is zinc oxide particles, the curing agent is triethylene tetramine, the enhancer is organic urea UR500, and the first coupling agent is a silane coupling agent; and

[0087] (2) laying the glass-fiber-reinforced cyanate-resin-based composite sheet as the first panel layer and the glass-fiber-reinforced epoxy-resin-based composite sheet as the second panel layer flat on the upper surface and the lower surface of the glass-fiber-reinforced graphene aerogel felt which is wrapped by the aluminum foil, respectively;

[0088] (3) performing a hot-press molding process at a temperature of 150° C. and a pressure of 5 MPa, thereby obtaining the heat insulation and preservation composite board.

Example 10

[0089] A heat insulation and preservation composite board includes a first panel layer, a heat insulation and preservation layer, and a second panel layer. The heat insulation and preservation layer is located between the first panel layer and the second panel layer. The heat insulation and preservation layer and the first panel layer are integrally formed, and the heat insulation and preservation layer and the second panel layer are integrally formed. The first panel layer is a metal plate. The second panel layer is a glass-fiber-reinforced epoxy-resin-based composite sheet. The heat insulation and preservation layer is a carbon-fiber-reinforced silicon dioxide aerogel felt. The surfaces of the carbon-fiber-reinforced silicon dioxide aerogel felt which are in contact with the first panel layer and the second panel layer are coated with heat insulation coatings. After being coated with the heat insulation coatings, the carbon-fiber-reinforced silicon dioxide aerogel felt is externally wrapped by an aluminum foil. A bonding agent is provided between the aluminum foil and the first panel layer and between the aluminum foil and the second panel layer.

[0090] A method for preparing the heat insulation and preservation composite board includes:

[0091] (1) laying the carbon-fiber-reinforced silicon dioxide aerogel felt flat, mixing an aqueous elastic paint, an aqueous resin, a flame retardant, silicon dioxide powder, a dispersing agent, and a second coupling agent in a mass ratio of 65:25:2:30:4:3 by stirring at a high speed to obtain a heat insulation slurry, and then coating the heat insulation slurry uniformly onto an upper surface and a lower surface of the carbon-fiber-reinforced silicon dioxide aerogel felt, and wrapping the aluminum foil around the carbon-fiber-reinforced silicon dioxide aerogel felt after the carbon-fiber-reinforced silicon dioxide aerogel felt is coated with the heat insulation slurry, applying the bonding agent on each of an upper surface and a lower surface of the aluminum foil; the aqueous elastic paint is an aqueous ethylene-vinyl acetate elastic paint, the aqueous resin is an aqueous epoxy resin, the flame retardant is decabromodiphenyl ether, the dispersing agent is BYK-163, and the second coupling agent is a silane coupling agent;

[0092] (2) laying the metal plate as the first panel layer and the glass-fiber-reinforced epoxy-resin-based composite sheet as the second panel layer flat on the upper surface and the lower surface of the fiber-reinforced aerogel felt which is wrapped by the aluminum foil, respectively; and

[0093] (3) performing a hot-press molding process at a temperature of 115° C. and a pressure of 2.5 MPa, thereby obtaining the heat insulation and preservation composite board.