Preparation process of high-temperature-resistant hydrophobic silicon dioxide aerogel heat-isolating blanket

A silica and preparation technology, applied in the field of chemical materials, can solve the problems of limiting the application of hydrophobic airgel, poor high-temperature hydrophobic performance, etc., and achieve the effects of short preparation cycle, less solvent consumption and no environmental pollution
CN106587908AInactive Publication Date: 2017-04-26GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
Publication Date
2017-04-26
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention provides a preparation process of a high-temperature-resistant hydrophobic silicon dioxide aerogel heat-isolating blanket. The high-temperature-resistant hydrophobic silicon dioxide aerogel heat-isolating blanket is mainly prepared by doping magnesium hydroxide into a glass fiber compound silicon dioxide aerogel by virtue of a sol-gel method and a supercutical fluid CO2 drying technology based on excellent characteristics of magnesium hydroxide. The high-temperature-resistant hydrophobic silicon dioxide aerogel heat-isolating blanket prepared by the process provided by the invention has excellent insulating property and mechanical property, good high-temperature-resistant hydrophobic property, and is convenient to construct. The preparation method avoids a step of replacing a solvent, and is simple to operate, controllable in process and continuous in production. The preparation process provided by the invention belongs to the technical field of chemical materials.
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Description

technical field

[0001] The invention relates to a preparation process of a high-temperature-resistant hydrophobic silicon dioxide airgel heat-insulating blanket, which belongs to the technical field of chemical materials. Background technique

[0002] SiO 2 Airgel is a light nanoporous amorphous solid material with controllable structure, its porosity is as high as 80%-99.8%, the pore size is 1-100nm, and the high specific surface area is 200-1000 m 2 / g, low density change range 3~500kg / m 3 , The thermal conductivity at normal temperature and pressure is less than 0.013 W / m.K, which is lower than that of still air (0.026 W / m.K), and it is the solid material with the lowest thermal conductivity at present.

[0003] At present, the main problems faced by the industrialization of silica airgel include: complex preparation process, long preparation cycle, large solvent consumption, and many waste liquids, etc., especially the infrared heat radiation of pure silica airgel incr...

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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