Ultra-light aerogel heat insulation material with waterproof and moisture permeation functions and preparation method thereof

Abstract

The invention provides an ultra-light aerogel heat insulation material with waterproof and moisture permeation functions and a preparation method thereof. The ultra-light aerogel heat insulation material with the waterproof and moisture permeation functions is characterized by comprising down-like structure fiber aerogel and a waterproof moisture permeation film compounded on the down-like structure fiber aerogel. The volume density of the heat insulation material is 1 to 300 mg / cm<3>; the hole porosity and small-pore-diameter structure is realized; the air convection can be prevented; the heat radiation is effectively reduced, so that the heat conduction coefficient can reach 0.015 to 0.023 W / (m k); meanwhile, the waterproof moisture permeation function is also realized by the heat insulation material, so that the garment use comfort and the heat insulation performance of the aerogel material are further improved.

Description

technical field [0001] The invention relates to the field of thermal insulation materials for clothing, in particular to an ultra-light airgel thermal insulation material with waterproof and moisture permeable functions obtained by compounding a down-like structural fiber airgel and a waterproof and moisture-permeable membrane with a very small pore size or a non-porous structure. Background technique [0002] At present, the most used thermal insulation materials for clothing are mainly cotton batting, down and other flakes and filling materials. In order to achieve a higher heat retention effect, the thickness of the batting must be increased, so that the product is too fluffy, which easily causes the wearer to be bloated and inconvenient to move. In addition, natural materials also have problems such as easy moisture absorption, poor strength, and easy insects. At the same time, limited production makes them expensive and difficult to meet the growing market demand for wa...

AI Technical Summary

Problems solved by technology

Its porosity is as high as 80-99.8%, and the pore size is generally between 1-100nm, which makes it have ultra-low thermal conductivity. However, the current preparation method of airgel materials is mainly the sol-gel method, and the obtained airgel materials are brittle. Large, poor mechanical strength and other shortcomings, so that it is greatly restricted in the actual application environment

Domestic patent CN201310202293.7 discloses an airgel material with an all-fiber structure. Although the material improves the mechanical strength and flexibility of the airgel, the internal pore size is formed by intersecting and penetrating fibers. The pore size is mostly interconnected open-pore structure, which makes it difficult to limit the air convection phenomenon inside the airgel, thus hindering the further improvement of its thermal performance

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