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Production method of silicon dioxide aerogel functional material

A functional material, silica technology, applied in the field of airgel, can solve the problems of poor mechanical properties of silica airgel, achieve the effect of improving physical crosslinking strength, low mass density, and improving compressive yield strength

Inactive Publication Date: 2019-06-07
谢吉萍
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AI Technical Summary

Problems solved by technology

[0008] Technical problem to be solved by the present invention: Aiming at the problem of poor mechanical properties of existing silica airgel, a preparation method of silica airgel functional material is provided

Method used

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Embodiment Construction

[0027]In parts by weight, weigh 20-30 parts of montmorillonite, 1-10 parts of carbon fiber, 1-5 parts of galacto-oligosaccharide, and 50-60 parts of deionized water, mix the montmorillonite and deionized water, Ultrasonic dispersion for 20-30min at a power of 200-300W to obtain a dispersion liquid, add carbon fiber to the dispersion liquid, continue ultrasonic dispersion for 5-10min, and magnetically stir for 30-40min at a rotational speed of 100-160r / min to obtain Mixed liquid, add galacto-oligosaccharide to the mixed liquid, continue to stir for 1-2 hours to obtain the base liquid, filter with suction to obtain the filter residue, dry the filter residue in an oven at a temperature of 60-80°C to constant weight, and cool to room temperature , to get the filler; in parts by weight, weigh 20-30 parts of ethyl orthosilicate, 40-50 parts of absolute ethanol, 20-30 parts of deionized water, 10-15 parts of filler, 1-5 parts N, N-dimethylformamide, 1-3 parts of 1% hydrochloric acid ...

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Abstract

The invention relates to a production method of a silicon dioxide aerogel functional material, and belongs to the technical field of aerogel. According to the production method of the silicon dioxideaerogel functional material, through carbonization treatment, the silicon dioxide aerogel functional material is produced, not only can an original nano-porous network structure be maintained, but also the silicon dioxide aerogel functional material has a plurality of excellent property such as a high specific surface area, low mass density and nanoscale continuous pores, and the mechanical performance is good; and montmorillonoid is a two-dimensional molecular-sieve-like porous substance, due to the fact that the montmorillonoid has performance of a large specific surface area, large adsorption capability and the like, the montmorillonoid is applied to a wide variety of aspects of adsorption, hydrogen storage, catalysis, bioseparation, electron devices, chromosorb supports and the like, through carbonization treatment, the swelling capability of a layered structure and exchangeable performance of positive ions of the montmorillonoid are used for inserting the inorganic positive ions into layers of the montmorillonoid, and the layers of the montmorillonoid are distracted to form two-dimensional pore channels with openings, so that the adsorption capability and the mechanical performance of the silicon dioxide aerogel functional material are improved.

Description

technical field [0001] The invention relates to a preparation method of a silica airgel functional material, belonging to the technical field of airgel. Background technique [0002] Airgel is a three-dimensional nano-network solid material composed of nanoparticles or polymer molecules. Its nanopores are filled with gas dispersion medium. Due to its excellent characteristics such as high porosity, large specific surface area, low thermal conductivity, low density, low refractive index, high transmittance, and low dielectric constant, it can be used in building materials, sensors, catalyst carriers, optical materials, etc. field. [0003] Sol-gel technology uses metal alkoxides or metalloid alkoxides as precursors, and under relatively mild and certain reaction conditions, through hydrolysis and polycondensation reactions, the sol particles or monomers are connected to form a three-dimensional network structure and form a gel. . Preparation of SiO by Sol-Gel Technology ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B38/00
Inventor 谢吉萍
Owner 谢吉萍
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