Ultra-black carbon-silica core-shell structure aerogel and preparation method thereof

A technology of silica and core-shell structure, applied in the preparation/purification of silica, silicon oxide, carbon, etc., can solve the problems of damage to the circuit system of the instrument, danger, etc., and achieve short process flow, short production cycle, and guaranteed Effect of cladding mass
CN110467174AInactive Publication Date: 2019-11-19TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2019-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an ultra-black carbon-silica core-shell structure aerogel and a preparation method thereof, wherein the core is an ultra-black carbon aerogel, and the surface of the core is coated with silica by using a chemical vapor deposition method to form a shell. The preparation method comprises: preparing a resorcinol-formaldehyde aerogel by using a sol-gel technology, and carryingout high-temperature carbonization treatment on the resorcinol-formaldehyde aerogel to obtain an ultra-black carbon aerogel; and forming a silica shell with a nano-scale thickness on the surface of the ultra-black carbon aerogel by using a chemical deposition method to obtain the ultra-black carbon-silica core-shell structure aerogel. Compared with the aerogel in the prior art, the aerogel of thepresent invention has low electrical conductivity of 0.021 ms / mm, has high light absorption rate, has an average absorption of more than 98.6% at a wave band of 400-2000 nm, and further has advantages of simple reaction process, low overall cost, low density, high yield, adjustable electrical conductivity and the like.
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Description

technical field

[0001] The invention belongs to the technical field of airgel material preparation, and in particular relates to an ultra-black carbon-silica core-shell structure airgel and a preparation method thereof. Background technique

[0002] Airgel is a multifunctional material with a three-dimensional nanoporous structure. It is widely used in many fields due to its excellent properties: high specific surface area, low density, low sound velocity, etc. Among them, carbon airgel is a three-dimensional network skeleton material with good mechanical properties and strong adsorption capacity, and has been used in various fields such as adsorption, electrochemistry, and wave absorption. In addition, carbon airgel is also an ultra-black material induced by subwavelength microstructure. Carbon aerogel is a broad-band strong absorption material, and its absorptivity has no obvious dependence on the incident angle, which makes it have application prospects in the fields of ...

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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