Method for preparing aerogel through solvent plasticizing and foaming

An aerogel, to-be-foamed technology, used in aerogel preparation, chemical instruments and methods, molybdenum sulfide, etc., can solve the problems of unfavorable industrial application, unstable structure, and high energy consumption

Inactive Publication Date: 2020-07-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many types of airgel, mainly focusing on carbon materials, inorganic materials, metal materials, etc. that cannot be realized by thermoplastic foaming technology, but the current preparation technology of airgel is mainly obtained by supercritical drying or freeze drying. , its energy consumption is high, and its resulting structure is unstable, so it is not conducive to large-scale industrial application

Method used

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  • Method for preparing aerogel through solvent plasticizing and foaming
  • Method for preparing aerogel through solvent plasticizing and foaming
  • Method for preparing aerogel through solvent plasticizing and foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix the aqueous suspension of 5mg / ml Mxenes with sodium bicarbonate evenly (the mass ratio of Mxenes to sodium bicarbonate is 1:1), dry to form a film, and then place it in 10% hydrochloric acid to generate bubbles, and get Porous Mxenes airgel materials such as figure 1 , with a wall thickness of 195nm, an average pore size of 100μm, and a density of 11mg / cm 3 .

Embodiment 2

[0025] Mix the aqueous suspension of 5 mg / ml molybdenum disulfide and sodium bicarbonate uniformly (mass ratio 1:1), dry to form a film, and then place it in 10% hydrochloric acid to generate gas foaming, and get Porous molybdenum disulfide airgel materials, such as figure 2 , with a wall thickness of 105nm, an average pore size of 87μm, and a density of 15mg / cm 3 .

Embodiment 3

[0027] Mix 11mg / ml bacterial cellulose aqueous suspension with sodium carbonate uniformly (mass ratio 1:5), dry to form a film, and then place it in 15% hydrochloric acid to generate gas foaming, and obtain a porous membrane after 1min. cellulose airgel materials, such as image 3 , with a wall thickness of 360nm, an average pore size of 230μm, and a density of 35mg / cm 3 .

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Abstract

The invention provides a method for preparing aerogel based on solvent plasticizing and foaming for the first time. An aerogel material is prepared through solvent plasticizing and in-situ bubble generation, the problem that a thermoplastic foaming process is difficult to realize for a non-polymer is solved, and the method has wide application universality. Besides, the scheme can select more foaming systems, is easy to implement, and does not need to utilize a special drying process, thereby greatly promoting the industrial development of the porous aerogel.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for preparing airgel by plasticizing and foaming with a solvent. Background technique [0002] Thermoplastic foam materials are widely used in daily life due to their excellent properties such as ultra-light, thermal insulation, and fatigue resistance, such as shock absorption and damping, heat insulation, packaging, sports protection, etc. The molecular chains of the polymer are disentangled to realize the infiltration of the gas, and the cells generated by the gas are fixed in the interior of the polymer through low-temperature setting to obtain a thermoplastic foam. However, the current thermoplastic foaming process is only suitable for polymer materials that can be plasticized at lower temperatures, such as polyurethane, polypropylene, etc., and for carbon materials, inorganic materials, metal materials, etc., due to their extremely high plas...

Claims

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Application Information

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IPC IPC(8): C01B32/194C01G39/06B01J13/00C08J9/08C08L1/02B22F3/11C01B32/198
CPCB01J13/0091B22F3/1125C01B2204/20C01G39/06C01P2006/10C01P2006/16C08J9/08C08J2203/02C08J2205/026C08J2301/02C01B32/194C01B32/198
Inventor 许震高超庞凯
Owner ZHEJIANG UNIV
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