A kind of preparation method of polysiloxane airgel

A polysiloxane and hydrogen polysiloxane technology is applied in the field of preparation of flexible and woven super-hydrophobic polysiloxane aerogels, and can solve the problems of cumbersome and time-consuming preparation steps of polysiloxane aerogels, poor environmental protection, Poor mechanical properties and other problems, to achieve the effect of easy industrial production, low production cost, simple and environmentally friendly production process
CN104610550BInactive Publication Date: 2017-02-22INST OF CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF CHEM CHINESE ACAD OF SCI
Publication Date
2017-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing polysiloxane aerogel. The preparation method comprises the following steps: carrying out a cross-linking reaction between hydrogen-containing polysiloxane and vinyl polysiloxane in a supercritical fluid in the presence of a catalyst, thereby obtaining the polysiloxane aerogel. The supercritical fluid can be any one of supercritical carbon dioxide fluid, supercritical methane fluid and supercritical nitrogen dioxide fluid, and the catalyst can be a Karstedt's catalyst or chloroplatinic acid. By utilizing a green solvent, a flexible cuttable knittable super-hydrophobic silica aerogel material is prepared in the supercritical fluid by virtue of a simple one-step method; the obtained silica aerogel has high flexibility and ultrahigh hydrophobicity and can perform cutting and knitting, and the application requirements on different shapes, different conditions and different needs are met; and moreover, the production cost is low, the production process is simple and environment-friendly, and industrial production is easily realized.
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Description

technical field

[0001] The invention relates to a preparation method of polysiloxane airgel, in particular to a preparation method of flexible and woven superhydrophobic polysiloxane airgel. Background technique

[0002] When most of the solvent is removed from the gel, the liquid content in the gel is much less than the solid content, or the space network structure of the gel is filled with gas, and the appearance is solid, which is called aerogel. There are many types of aerogels, including silicon-based, carbon-based, sulfur-based, metal oxide-based or metal-based, and so on. The common airgel is silica airgel, which was first prepared by American scientist Kistler in 1931. Due to its nano-porous and porous properties, aerogels are widely used in high-tech strong laser low-density target materials, high-efficiency heat insulation materials, acoustic delay materials, and high-performance catalysts.

[0003] Silica airgel has the characteristics of nanoporous three-dimens...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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