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Negative-Poisson ratio multifunctional sponge and preparation method thereof

A multifunctional sponge, negative Poisson's ratio technology, applied in the field of new materials

Active Publication Date: 2015-10-28
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] All current work is trying to control different nanomaterial components through chemical means. However, the multifunctional properties and applications of porous solids often depend largely on their microstructure, but there are no literatures and patents related to polymer templates Design, regulation and optimization of the microstructure of the sponge material prepared by the method

Method used

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  • Negative-Poisson ratio multifunctional sponge and preparation method thereof
  • Negative-Poisson ratio multifunctional sponge and preparation method thereof
  • Negative-Poisson ratio multifunctional sponge and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The present embodiment adopts the following method to prepare negative Poisson's ratio multifunctional sponge:

[0061] (1) Set the density to 23mg / cm 3 Polyurethane sponge cut into 3 x 3 x 10cm 3 The cuboid was cleaned with ethanol by ultrasonic for 30min, then washed with sufficient water, and dried at 80°C;

[0062] (2) Take 100 mL of graphene oxide aqueous solution with a density of 1 mg / mL, mix it evenly with 300 μL (0.3% by volume) of hydrazine hydrate, put it into a mold, and extract air bubbles;

[0063] (3) Soak the dried sponge in a mould. After the whole sponge is filled with the blending solution, put it into a well-sealed 99°C incubator and keep it warm for 12 hours to obtain a graphene sponge;

[0064] (4) Take out the graphene sponge, and clean it with ethanol, then dry it at 60°C;

[0065] (5) The dried graphene sponge is uniformly compressed in three directions in the mold, and the uniformly compressed volume is 0.45 times of the initial volume; and ...

Embodiment 2

[0069] The present embodiment adopts the following method to prepare negative Poisson's ratio multifunctional sponge:

[0070] (1) Set the density to 5mg / cm 3 Polyurethane sponge cut into 3 x 3 x 10cm 3 The cuboid was cleaned with ethanol by ultrasonic for 30min, then washed with sufficient water, and dried at 80°C;

[0071] (2) get 100mL density and be that the silver nanowire dispersion liquid of 10mg / mL is put into the mould, extract air bubble;

[0072] (3) Soak the dried sponge in a mould, and dry it at 100°C for 4 hours after the whole sponge is fully absorbed with the dispersion liquid to obtain a silver nanowire sponge;

[0073] (4) The dried nano-silver wire sponge is uniformly compressed in three directions in the mold, and the uniformly compressed volume is 0.13 times the initial volume; and kept at 220° C. for 10 minutes;

[0074] (5) After naturally cooling to room temperature, the negative Poisson's ratio multifunctional sponge is obtained, and the loaded nano...

Embodiment 3

[0077] The present embodiment adopts the following method to prepare negative Poisson's ratio multifunctional sponge:

[0078] (1) Set the density to 27.5mg / cm 3 A melamine sponge cut into 3 x 3 x 10cm 3 The cuboid was cleaned with ethanol by ultrasonic for 30min, then washed with sufficient water, and dried at 80°C;

[0079] (2) get 100mL density and put into the mould, take out the air bubble;

[0080] (3) Soak the dried sponge in a mould, and dry it at 140°C for 2 hours after the whole sponge is fully absorbed with the dispersion liquid to obtain a silver nanowire sponge;

[0081] (4) uniformly compress the dried nano-silver wire sponge in three directions in the mold, and the uniformly compressed volume is 0.8 times of the initial volume; and keep warm at 185° C. for 100 min;

[0082] (5) After naturally cooling to room temperature, the negative Poisson's ratio multifunctional sponge was obtained, and the mass ratio increased by 145% compared with that without treatment...

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Abstract

The invention relates to a negative-Poisson ratio multifunctional sponge and a preparation method thereof. The negative-Poisson ratio multifunctional sponge is loaded with a nano material, and the negative-Poisson ratio multifunctional sponge has a pore structure composed of bent fiber; the curved fiber is sunken inward. The preparation method comprises the steps that a sponge substrate is loaded with the nano material, and then the negative-Poisson ratio multifunctional sponge is obtained through hot pressing. The negative-Poisson ratio multifunctional sponge has the advantages of being high in conductivity, high in energy dissipation, excellent in hydrophobicity, and high in piezoresistive sensitivity; in addition, the inward-sunken bent fiber structure of the negative-Poisson ratio multifunctional sponge enables the negative-Poisson ratio multifunctional sponge to achieve a negative Poisson ratio and higher tensile failure strain, lateral expansion can be achieved in tension, lateral contraction can be achieved in compression, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a negative Poisson's ratio multifunctional sponge and a preparation method thereof. Background technique [0002] Porous solids such as sponges with low density, flexibility, mechanical resilience and multifunctionality have very broad application prospects. Conventional polymeric sponges, such as polyurethane sponges and melamine sponges, can usually only meet the low-density, flexibility, and elasticity requirements of three-dimensional porous solids for applications. In order to achieve specific functions, people have tried to realize the multifunctional preparation scheme of sponge by exerting the functional properties of nanomaterials at the macro scale. [0003] The research on the assembly of nanomaterials into three-dimensional macroscopic sponges is still in its infancy. At present, there are two main methods, self-assembly in solution and template met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L61/28C08K3/04C08K3/08B29C43/02B29C43/52
Inventor 戴兆贺刘璐琪张忠
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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