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Preparation method of environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial, product thereof, and application of product

An environment-friendly, negative Poisson's ratio technology, applied in the measurement of the property force of the applied piezoelectric resistance material, fluid pressure measurement by changing the ohmic resistance, etc., can solve the problems of high mechanical properties, insufficient functional characteristics, and lack of preparation Methods and key common manufacturing technologies, etc., to achieve high mechanical response sensitivity, wide application prospects, and high sensing sensitivity

Pending Publication Date: 2021-12-24
广州纳研新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The common points of polymer-based conductive functional porous materials reported in the above literature are: (1) It is difficult to realize the multifunctional integration of mechanical flexibility, sensing stability, high mechanical toughness, high sensing sensitivity, and environmental friendliness, which cannot meet the requirements of artificial intelligence, Higher practical requirements for intelligent sensing in many fields such as human health monitoring (2) The microstructure is an ordinary positive Poisson's ratio cell structure array, and it is difficult to achieve the coordination and unity of mechanical flexibility, high absolute modulus, and high absolute strength of porous materials (3) Insufficient functional properties, especially for bio-based lightweight bio-based polymer porous materials with relatively weak mechanical properties, it is difficult to achieve a substantial reinforcement of their high mechanical properties, which is not conducive to the piezoresistive sensing of their mechanical response
[0009] Therefore, the characteristics of the above methods all make it difficult to manufacture high-performance & multifunctional integrated & environment-friendly oriented wearable lightweight flexible piezoresistive sensing materials that meet the practical requirements of smart sensing
Therefore, there is a lack of a low-cost and industrialized manufacturing-oriented multifunctional integrated lightweight degradable bio-based flexible piezoresistive sensing porous material preparation method and key common manufacturing technology

Method used

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  • Preparation method of environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial, product thereof, and application of product
  • Preparation method of environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial, product thereof, and application of product
  • Preparation method of environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial, product thereof, and application of product

Examples

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Effect test

Embodiment 1

[0041] Prepare a polybutylene terephthalate-adipate / multi-walled carbon nanotube composite flexible piezoresistive sensing porous material with a negative Poisson's ratio, the preparation method comprising the following steps:

[0042] (1) Preparation of polybutylene terephthalate-adipate / multi-walled carbon nanotube composite: according to the mass ratio of 1.33:25, polybutylene succinate and multi-walled carbon nanotubes were physically Doping and blending to obtain the polybutylene terephthalate-adipate / multi-wall carbon nanotube composite.

[0043] (2) Preparation of positive Poisson's ratio flexible piezoresistive sensing porous material: Accurately weigh 12g of polybutylene terephthalate-adipate / multi-walled carbon nanotube composite particles in a specific mold (such as figure 1 As shown, a cylindrical mold made of SUS304 stainless steel is used. The cylindrical wall of the mold is separated from the upper cover and the lower cover respectively. The mold wall and the up...

Embodiment 2

[0048] A polybutylene succinate / multi-walled carbon nanotube composite flexible piezoresistive sensing porous material with a negative Poisson's ratio is prepared, and the preparation method comprises the following steps:

[0049] (1) Preparation of polybutylene succinate / multi-walled carbon nanotube composite: according to the mass ratio of 1.33:25 polybutylene terephthalate-adipate, polyurethane and multi-walled carbon nanotubes The polybutylene terephthalate-adipate / multi-walled carbon nanotube composite was obtained by blending by physical doping.

[0050] (2) Preparation of positive Poisson's ratio flexible piezoresistive sensing porous material: Accurately weigh 10 g of polybutylene succinate / multi-walled carbon nanotube composite particles in a specific mold (cylindrical shape made of SUS304 stainless steel) Mold, the cylindrical wall of the mold is separated from the upper cover and the lower cover respectively, the mold wall is fixed with the upper cover and the lower...

Embodiment 3

[0054] A polycarbonate-based polyester polyurethane / multi-walled carbon nanotube composite flexible piezoresistive sensing porous material with a negative Poisson's ratio is prepared. The specific preparation method includes the following steps:

[0055] (1) Preparation of polycarbonate-based polyester polyurethane / multi-walled carbon nanotube composites: blending polycarbonate-based polyester polyurethane and multi-walled carbon nanotubes by physical doping at a mass ratio of 1.04:25 Obtain polycarbonate-based polyester polyurethane / multi-walled carbon nanotube composite;

[0056] (2) Preparation of positive Poisson’s ratio flexible piezoresistive sensing porous material: Accurately weigh 12 g of polycarbonate-based polyester polyurethane / multi-walled carbon nanotube composite particles in a specific mold, and place the mold with an inner volume of In a 500mL autoclave, close the exhaust valve; open the vent valve, inject 266mL of carbon dioxide fluid into the autoclave with ...

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Abstract

The invention relates to a preparation method of an environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial, a product thereof, and application of the product, and belongs to the technical field of preparation of piezoresistive sensor metamaterials. The preparation method of the environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial is based on the theory of a negative Poisson's ratio metamaterial. The preparation method and the key common manufacturing technology of the multifunctional integrated light degradable bio-based flexible piezoresistive sensing porous metamaterial meet practical requirements of high mechanical flexibility, sensing stability, high mechanical toughness, high sensing sensitivity, environmental friendliness and the like of intelligent piezoresistive sensing in the fields of artificial intelligence, mass health and the like, and also meet the requirements of industrial scale manufacturing and low cost at the same time.

Description

technical field [0001] The invention belongs to the technical field of preparation of piezoresistive sensing metamaterials, and relates to a preparation method of an environment-friendly lightweight negative Poisson's ratio flexible piezoresistive sensing metamaterial and its products and applications. Background technique [0002] Polymer-based porous materials, including polymer-based aerogels and foams, have numerous interconnected or disconnected micropores in their internal microstructure, so they usually have low apparent density, high specific strength, and high specific modulus. Physical properties, are widely used in packaging and transportation, biomedical, aerospace, auto parts and many other fields. In recent years, with the in-depth research on the functionalization of porous materials and the expansion of application fields, polymer-based conductive functional porous materials due to their excellent piezoresistive properties and multifunctional integration of l...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L75/04C08L75/06C08K3/04C08J9/12G01L1/18G01L9/06
CPCC08J9/122C08J9/0071C08J9/0061G01L1/18G01L9/06C08J2203/06C08J2203/08C08J2367/02C08J2375/04C08J2375/06
Inventor 黄进何毅张水洞
Owner 广州纳研新材料科技有限公司