Preparation method of bio-based rigid foam material with negative Poisson's ratio and product

A foam material and negative Poisson's ratio technology, which is applied in the field of preparation of negative Poisson's ratio bio-based rigid foam materials, can solve the problems of complicated process and unfavorable industrialization, and achieve low equipment requirements, low cost, and narrow pore size distribution effect

Active Publication Date: 2020-06-02
碳衡(重庆)生物质新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2) Based on the theoretical basis of physical cross-linking or chemical cross-linking, the further processing of bio-based materials is complicated;
[0008] Therefore, from the perspective of industrial scale, the characteristics of the above-mentioned methods all make the large-scale production of high-performance bio-based rigid foam materials subject to certain restrictions, which is not conducive to industrialization.

Method used

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  • Preparation method of bio-based rigid foam material with negative Poisson's ratio and product
  • Preparation method of bio-based rigid foam material with negative Poisson's ratio and product
  • Preparation method of bio-based rigid foam material with negative Poisson's ratio and product

Examples

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Effect test

Embodiment 1

[0027] Preparation of Negative Poisson's Ratio Bio-based Rigid Foam

[0028] (1) Place polybutylene succinate in a cylindrical autoclave, close the autoclave and feed carbon dioxide until the air in the autoclave is exhausted, continue to feed carbon dioxide to high pressure After the pressure in the autoclave is 8MPa, stop feeding carbon dioxide, heat up to 120°C and keep for 2h, then cool down to 96°C and keep for 10min, then reduce the pressure in the autoclave to atmospheric pressure within 3s, take out the product and cool to room temperature, Produce bio-based rigid foams;

[0029] (2) Heat the bio-based rigid foam material prepared in step (1) to 102°C, keep it for 0.5h, and then compress it from the axial and circumferential directions of the bio-based rigid foam material, wherein the axial direction The compressibility is 30%, the circumferential compressibility is 17%, and the bio-based rigid foam material with a Poisson's ratio of -0.2 is obtained.

Embodiment 2

[0031] Preparation of Negative Poisson's Ratio Bio-based Rigid Foam

[0032] (1) Place the polylactic acid in a cylindrical autoclave, close the autoclave and feed carbon dioxide until the air in the autoclave is exhausted, continue to feed carbon dioxide until the pressure in the autoclave is 9MPa Then stop feeding carbon dioxide, heat up to 170°C and keep for 3 hours, then cool down to 155°C and keep for 12 minutes, then reduce the pressure in the autoclave to atmospheric pressure within 3 seconds, take out the product and cool it to room temperature to obtain a bio-based hard foam material;

[0033] (2) Heat the bio-based rigid foam material prepared in step (1) to 55°C, keep it for 0.5h, and then compress it from the axial and circumferential directions of the bio-based rigid foam material, wherein the axial direction The compression ratio is 10%, and the compression ratio in the circumferential direction is 30%, and a bio-based rigid foam material with a Poisson's ratio ...

Embodiment 3

[0035] Preparation of Negative Poisson's Ratio Bio-based Rigid Foam

[0036](1) Place the polyhydroxyalkanoate in a cylindrical autoclave, close the autoclave and feed carbon dioxide into the autoclave until the air in the autoclave is exhausted, and continue to feed carbon dioxide into the autoclave After the pressure reaches 8.5MPa, stop feeding carbon dioxide, heat up to 180°C and keep for 2.5h, then cool down to 168°C and keep for 15min, then reduce the pressure in the autoclave to atmospheric pressure within 3s, take out the product and cool it to room temperature, and prepare Obtain bio-based rigid foam materials;

[0037] (2) Heat the bio-based rigid foam material prepared in step (1) to 110°C, keep it for 1 hour and compress it from the axial and circumferential directions of the bio-based rigid foam material, wherein the axial compression The ratio is 20%, the circumferential compressibility is 10%, and a bio-based rigid foam material with a Poisson's ratio of -0.12 ...

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Abstract

The invention relates to a preparation method of a bio-based rigid foam material with a negative Poisson's ratio and a product, and belongs to the technical field of materials. The method comprises the following steps of: firstly, preparing a bio-based rigid foam material through a supercritical fluid foaming technology, and then taking the bio-based rigid foam material as the raw material to prepare the bio-based rigid foam material with a negative Poisson's ratio through a heating-three-dimensional axial compression process. The method is simple and easy to operate, low in equipment requirement, low in cost and suitable for expanded production. The foam material prepared by the method not only is light in weight and degradable, but also has excellent compression, shock resistance and other mechanical properties, and has good application prospects in the fields of aerospace, automobiles, ships, encapsulation and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method and product of a negative Poisson's ratio bio-based rigid foam material. Background technique [0002] Foam material is covered with countless interconnected or disconnected micropores so that the apparent density is significantly reduced and has the advantages of high specific strength, light weight, good insulation, sound insulation, and heat insulation performance. It is widely used in packaging, transportation, biological Medical, aerospace, auto parts and many other fields. In recent years, with the improvement of the requirements for light weight and functionalization of materials in related fields and industries, relevant researchers at home and abroad have paid more attention to the preparation of new polymer porous materials and the modification of polymer porous materials, and have conducted a large number of literatures on them. Repo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L67/02C08L67/04
CPCC08J9/122C08J2203/06C08J2367/02C08J2367/04
Inventor 黄进何毅
Owner 碳衡(重庆)生物质新材料有限公司
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