A kind of preparation method and product of negative Poisson's ratio bio-based rigid foam material

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 excellent compression Effect

Active Publication Date: 2022-07-22
碳衡(重庆)生物质新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method and product of negative Poisson's ratio bio-based rigid foam material
  • A kind of preparation method and product of negative Poisson's ratio bio-based rigid foam material
  • A kind of preparation method and product of negative Poisson's ratio bio-based rigid foam material

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Experimental program
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Effect test

Embodiment 1

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

[0028] (1) polybutylene succinate is placed in the autoclave whose inner cavity is cylindrical, the autoclave is closed and carbon dioxide is passed into the autoclave and the air in the autoclave is exhausted, and carbon dioxide is continued to be passed into the autoclave to high pressure After the pressure in the autoclave was 8MPa, carbon dioxide was stopped, heated to 120°C for 2h, then cooled to 96°C for 10min, and the pressure in the autoclave was reduced to atmospheric pressure within 3s, and the product was taken out and cooled to room temperature, Preparation of bio-based rigid foam material;

[0029] (2) heating the bio-based rigid foam material obtained in step (1) to 102° C., and compressing the bio-based rigid foam material in the axial and circumferential directions after holding for 0.5 h, wherein the axial The compression ratio was 30%, and the compression ratio in the circumferential dire...

Embodiment 2

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

[0032] (1) polylactic acid is placed in the autoclave that the inner cavity is cylindrical, the autoclave is closed and carbon dioxide is passed into the autoclave and the air in the autoclave is exhausted, and the pressure in the autoclave that continues to feed carbon dioxide is 9MPa Then stop feeding carbon dioxide, heat up to 170°C for 3h, then cool down to 155°C for 12min, then reduce the pressure in the autoclave to the atmospheric pressure level within 3s, take out the product and cool it to room temperature to obtain bio-based rigid Sexual foam material;

[0033] (2) heating the bio-based rigid foam material obtained in step (1) to 55° C., and compressing the bio-based rigid foam material in the axial and circumferential directions after holding for 0.5 h, wherein the axial The compression ratio was 10%, and the compression ratio in the circumferential direction was 30% to obtain a bio-based rigid ...

Embodiment 3

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

[0036](1) polyhydroxy fatty acid ester is placed in a cylindrical high-pressure reactor with inner cavity, closed this high-pressure reactor and feed carbon dioxide to the high-pressure reactor and the air is exhausted, continue to feed carbon dioxide to the high-pressure reactor After the pressure was 8.5MPa, the introduction of carbon dioxide was stopped, heated to 180°C and kept for 2.5h, then cooled to 168°C for 15min, and then the pressure in the autoclave was reduced to the atmospheric pressure level within 3s, and the product was taken out and cooled to room temperature. Bio-based rigid foam material;

[0037] (2) heating the bio-based rigid foam material obtained in step (1) to 110° C., and compressing the bio-based rigid foam material in the axial and circumferential directions after holding for 1 h, wherein the axial compression The compression ratio in the circumferential direction is 20%, and t...

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Abstract

The invention relates to a preparation method and a product of a negative Poisson's ratio biological-based rigid foam material, belonging to the technical field of materials. In this method, bio-based rigid foam materials are first prepared by supercritical fluid foaming technology, and then bio-based rigid foam materials are used as raw materials to obtain negative Poisson's ratio bio-based rigid foam materials by heating-three-dimensional axial compression method. foam material. The method is simple and easy to operate, has low equipment requirements and low cost, and is suitable for enlarged production. The foam material prepared by this method is not only light and degradable, but also has excellent mechanical properties such as compression and shock resistance, and has good application prospects in the fields of aerospace, automobile, ship, 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] The foam material is full of numerous interconnected or disconnected micropores, which significantly reduces the apparent density and has the advantages of high specific strength, light weight, insulation, sound insulation, and good thermal insulation properties. It is widely used in packaging, transportation, biological Medical, aerospace, auto parts and many other fields. In recent years, with the improvement of material lightweight and functionalization requirements 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 a large number of literatures have been carried out on them. The report has...

Claims

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Application Information

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Patent Type & Authority Patents(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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