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EP-4737118-A1 - FLEXIBLE COMPOSITE MATERIAL AND PREPARATION METHOD AND APPLICATION THEREOF

EP4737118A1EP 4737118 A1EP4737118 A1EP 4737118A1EP-4737118-A1

Abstract

The present invention provides a flexible composite material, and a preparation method and an application thereof, belonging to the technical field of functional materials. The flexible composite material provided by the present invention comprises a fiber cloth and a strontium titanate nano-micro material compounded in the fiber cloth; the raw materials for preparing the strontium titanate nano-micro material comprise a matrix material and a dispersant, the mass of the dispersant is 0.05-0.2% of the mass of the matrix material; the matrix material comprises the following raw materials in mass fractions: 50-90 parts of a powdered resin; 10-50 parts of a curing agent; 0-20 parts of an antioxidant additive; 0.05-0.2 parts of a catalyst; 0-10 parts of a surface adjuster, 0-20 parts of a light stabilizer; 0.05-5 parts of a strontium titanate nano-additive, and the strontium titanate nano-additive is a compound of octahedral strontium titanate, hexahedral strontium titanate and irregular strontium titanate in a specific ratio. The flexible composite material provided by the present invention has excellent weather resistance.

Inventors

  • JING, Liang
  • Gao, Keqiang
  • ZHANG, Jiansen
  • DONG, Qihui
  • ZHANG, GUIBIN
  • SHAO, BO
  • ZHANG, XIAOCHEN

Assignees

  • Cangzhou Newmat Aadvanced Materials Technology Co., Ltd
  • Newmat (Beijing) Environmental Materials Technology Co., Ltd

Dates

Publication Date
20260506
Application Date
20231211

Claims (20)

  1. A flexible composite material, comprising a fiber cloth and a strontium titanate nano-micro material composited into the fiber cloth, wherein raw materials for preparing the strontium titanate nano-micro material comprise a matrix material and a dispersant; a mass of the dispersant is 0.05-0.2% of a mass of the matrix material; and the matrix material is prepared from the following raw materials in parts by mass: 50-90 parts of a powdered resin; 10-50 parts of a curing agent; 0-20 parts of an antioxidant additive; 0.05-0.2 parts of a catalyst; 0-10 parts of a surface conditioner; 0-20 parts of a light stabilizer; and 0.05-5 parts of a strontium titanate nano-additive, wherein the strontium titanate nano-additive is a mixture of octadecahedral strontium titanate, hexahedral strontium titanate and irregular strontium titanate at a mass ratio of 3-4 : 4-6 : 1-2.
  2. The flexible composite material of claim 1, wherein the fiber cloth is a fiberglass cloth.
  3. The flexible composite material of claim 2, wherein the fiber cloth has a grammage of 100-400 g/m 2 .
  4. The flexible composite material of claim 1, wherein the strontium titanate nano-additive has a particle size of 50-300 nm.
  5. The flexible composite material of claim 4, wherein the octadecahedral strontium titanate has a particle size of 100-200 nm; the hexahedral strontium titanate has a particle size of 100-200 nm; and the irregular strontium titanate has a particle size of 50-100 nm.
  6. The flexible composite material of claim 1, wherein the powdered resin comprises at least one selected from the group consisting of an acrylic resin, a polyurethane resin, and a polyester resin.
  7. The flexible composite material of claim 6, wherein the acrylic resin is an epoxy acrylic resin.
  8. The flexible composite material of claim 1, wherein the curing agent comprises at least one selected from the group consisting of dodecanedioic acid, triglycidyl isocyanurate, and an isocyanate.
  9. The flexible composite material of claim 1, wherein the antioxidant additive comprises at least one selected from the group consisting of stearyl beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, a benzofuranone derivative, and a thioester antioxidant.
  10. The flexible composite material of claim 1, wherein the catalyst comprises one selected from the group consisting of tetrabutylammonium bromide, dibutyltin dilaurate, and 2-propylimidazole.
  11. The flexible composite material of claim 1, wherein the surface conditioner comprises benzoin.
  12. The flexible composite material of claim 1, wherein the light stabilizer comprises one selected from the group consisting of a triazine light stabilizer, and a hindered amine light stabilizer.
  13. The flexible composite material of claim 1, wherein the matrix material has a particle size of 30-150 µm.
  14. The flexible composite material of claim 1, wherein the dispersant has a particle size of 2-8 µm.
  15. The flexible composite material of claim 1, wherein the dispersant comprises at least one selected from the group consisting of alumina, fumed silica, and glass microbeads.
  16. The flexible composite material of any one of claims 1-15, wherein a content of the strontium titanate nano-micro material in the flexible composite material is in a range of 50-80 wt%.
  17. A method for preparing the flexible composite material of any one of claims 1-16, comprising the following steps: impregnating the fiber cloth using the strontium titanate nano-micro material in a molten state, and then curing to obtain the flexible composite material.
  18. The method of claim 17, wherein the impregnating the fiber cloth using the strontium titanate nano-micro material in the molten state comprises: laying the strontium titanate nano-micro material on a surface of the fiber cloth, and heating a resulting system by a lamination device or a rolling device such that the strontium titanate nano-micro material is melted and then impregnates the fiber cloth.
  19. The method of claim 17, wherein the impregnating the fiber cloth using the strontium titanate nano-micro material in the molten state comprises: extruding the strontium titanate nano-micro material to obtain a resin film, laminating the resin film onto a surface of the fiber cloth, and heating an obtained system by a lamination device or a rolling device such that the resin film is melted and then impregnates the fiber cloth.
  20. The method of any one of claims 17-19, wherein the curing is performed at a temperature of 130-200°C and a pressure of 1-20 MPa for 10-90 minutes.

Description

The present application claims priority to Chinese Patent Application No. CN 202310778172.0, entitled "FLEXIBLE COMPOSITE MATERIAL, AND PREPARATION METHOD AND USE THEREOF" filed with the China National Intellectual Property Administration (CNIPA) on June 29, 2023, which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the technical field of functional materials, in particular to a flexible composite material, and a preparation method and use thereof. BACKGROUND Conventional photovoltaic modules, consisting of a TPT backsheet, an EVA film, solar cells, a glass panel, frames, etc., are rigid components that are not prone to deformation and are relatively heavy, being unsuitable for scenarios where bending or a light weight is required. Flexible solar panels are a product of emerging technologies in the solar industry in the world, specifically characterized by the replacement of the glass panels, or even the TPT backsheets, in the conventional photovoltaic modules with flexible composite materials to achieve the protection and supporting of the solar cells. The flexible solar panels are flexible and bendy, and could be bent at will to conform to a shape of a roof, provided that an average roof slope is less than 60° and a bending radius of panels is greater than 13 m. Moreover, the flexible solar panels have a light weight, thereby avoiding both an excessive load on the roof and great changes in a main structure of the roof due to laying of the flexible solar panels. However, weather resistance of the flexible composite materials in the prior art needs to be further improved. SUMMARY The present disclosure is intended to provide a flexible composite material, and a preparation method and use thereof. The flexible composite material provided by the present disclosure has excellent weather resistance. To achieve the above objects, the present disclosure provides the following technical solutions. The present disclosure provides a flexible composite material, including a fiber cloth and a strontium titanate nano-micro material composited into the fiber cloth, where raw materials for preparing the strontium titanate nano-micro material include a matrix material and a dispersant;a mass of the dispersant is 0.05-0.2% of a mass of the matrix material; andthe matrix material is prepared from the following raw materials in parts by mass: 50-90 parts of a powdered resin; 10-50 parts of a curing agent; 0-20 parts of an antioxidant additive; 0.05-0.2 parts of a catalyst; 0-10 parts of a surface conditioner; 0-20 parts of a light stabilizer; and 0.05-5 parts of a strontium titanate nano-additive, where the strontium titanate nano-additive is a mixture of octadecahedral strontium titanate, hexahedral strontium titanate and irregular strontium titanate at a mass ratio of 3-4 : 4-6 : 1-2. In some embodiments, the fiber cloth is a fiberglass cloth. In some embodiments, the fiber cloth has a grammage of 100-400 g/m2. In some embodiments, the strontium titanate nano-additive has a particle size of 50-300 nm. In some embodiments, the octadecahedral strontium titanate has a particle size of 100-200 nm; the hexahedral strontium titanate has a particle size of 100-200 nm; and the irregular strontium titanate has a particle size of 50-100 nm. In some embodiments, the powdered resin includes at least one selected from the group consisting of an acrylic resin, a polyurethane resin, and a polyester resin. In some embodiments, the acrylic resin is an epoxy acrylic resin. In some embodiments, the curing agent includes at least one selected from the group consisting of dodecanedioic acid, triglycidyl isocyanurate, and an isocyanate. In some embodiments, the antioxidant additive includes at least one selected from the group consisting of stearyl beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, a benzofuranone derivative, and a thioester antioxidant. In some embodiments, the catalyst includes one selected from the group consisting of tetrabutylammonium bromide, dibutyltin dilaurate, and 2-propylimidazole. In some embodiments, the surface conditioner includes benzoin. In some embodiments, the matrix material has a particle size of 30-150 µm. In some embodiments, the dispersant has a particle size of 2-8 µm. In some embodiments, the dispersant includes at least one selected from the group consisting of alumina, fumed silica, and glass microbeads. In some embodiments, a content of the strontium titanate nano-micro material in the flexible composite material is in a range of 50-80 wt%. The present disclosure provides a method for preparing the flexible composite material described in the aforementioned technical solutions, including the following steps: impregnating the fiber cloth using the strontium titanate nano-micro material in a molten state, and then curing to obtain the flexible composite material. In some embodiments, the impregnating the fiber cloth using the strontium titanate