Kevlar aerogel film, and preparation method and application thereof

A Kevlar gel and aerogel technology, which is applied in the field of nanoporous materials, can solve the problems of long preparation period, difficult to realize industrialization, and incapable of continuous large-scale preparation, and achieves high porosity, easy continuous, The effect of good flexibility
CN109608686AInactive Publication Date: 2019-04-12SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Publication Date
2019-04-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a Kevlar aerogel film, and a preparation method and application thereof. The Kevlar aerogel film has a communicating three-dimensional network-like porous structure formed by mutual overlapping of Kevlar nanofibers. The preparation method comprises: dissolving Kevlar fibers to form a Kevlar nanofiber sol; applying the Kevlar nanofiber sol to a substrate, and then transferring the substrate to a coagulation bath, and performing a sol-gel process and a subsequent solvent replacement process to form a Kevlar gel film; and finally, conducting drying to obtain the Kevlar aerogel film. The Kevlar aerogel film of the invention has high specific surface area and porosity, good flexibility, thermal stability and chemical stability, and the preparation process is simple, andis easy for continuous large-scale production. The Kevlar aerogel film can be directly used as a dielectric material, a sound insulation material, a heat insulation material, a filter film material, etc., and can also be used as a substrate of a flexible functional composite material.
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Description

technical field

[0001] The invention relates to a novel aerogel film, in particular to a flexible self-supporting Kevlar aerogel film, a preparation method and application thereof, and belongs to the technical field of nanoporous materials. Background technique

[0002] Aerogel materials are lightweight and porous nanomaterials. The preparation process usually requires supercritical drying or freeze drying to replace the liquid in the wet gel with gas without significantly changing the network structure of the gel, so it has a specific surface area. Large, high porosity, low thermal conductivity, low density and other unique properties. Aerogel was born in 1931. With the rapid development of science and technology, a variety of high-performance aerogel materials continue to emerge, which have shown attractive application prospects in the fields of environmental protection, energy storage and conversion, and biomedicine. Traditional aerogel materials are mostly bulk or powde...

Claims

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