Stress sensing conductive aerogel and preparation method thereof

Abstract

The invention relates to a stress-sensing conductive aerogel and a preparation method, the stress-sensing conductive aerogel has a three-dimensional network skeleton structure, and is prepared from a stable dispersion liquid, an ethylene glycol solution, FeCl3, an ethylene glycol mixed solution, deionized water, a PVA aqueous solution, PEG 4000, polyethylene glycol and a nanocellulose suspension; wherein the stable dispersion liquid is prepared from graphene oxide and an ethanol solution, and the PVA aqueous solution is prepared from polyvinyl alcohol and deionized water. The stress sensing conductive aerogel has highly developed porosity and excellent elasticity, and holes of a three-dimensional network skeleton structure can be shrunk along with increase of pressure, so that contact points between graphene / silver nanowire sheet layers are increased, conductive networks are increased, resistance is reduced, conductive performance is improved, compressibility is higher, and conductivity is higher. In addition, the material is prepared from a degradable biological material and is fused with a graphene / silver nanowire composite material, is environment-friendly, so that the material can be recycled and degraded.

Description

technical field [0001] The invention belongs to the technical field of airgel, and in particular relates to a stress-sensing conductive airgel and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and economy, environmental pollution and resource shortage have become the main problems faced by human beings. Environmental protection has always been the goal of countries all over the world, and new environmentally friendly materials have also attracted more and more scholars' attention. Since the creation of polymer science in 1930, the rapid development of hydrocarbon polymers, the consumption of non-renewable resources such as petroleum and coal mines, and the extensive use of non-degradable polymers and their chemical products have caused a series of environmental pollution and energy shortages. . [0003] The applicant found that in recent years, airgel has been widely used in the fields of optoelectronics, s...

AI Technical Summary

Problems solved by technology

However, the physical connection network of nanocellulose is very fragile. After cellulose pyrolysis, the cellulose macromolecules are severely degraded, resulting in poor strength of nanocellulose airgel. Although it has high compressibility, it is very easy to compress during the compression process. broken

In addition, the dehydration and removal of a large number of oxygen-containing groups during the pyrolysis process of cellulose lead to a severe shrinkage of the volume of nanocellulose.

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