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A kind of preparation method of airgel

A kind of aerogel, special technology, applied in the field of aerogel preparation, can solve the problem that the pore size of macroporous silica gel is not large enough, and achieve the effect of high specific surface area

Active Publication Date: 2018-06-12
RUSHAN DAYANG SILICA GEL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that the pore diameter of the existing macroporous silica gel is not large enough, and provides a method for preparing an aerogel with a large pore volume, a pore diameter, and a high specific surface area.

Method used

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  • A kind of preparation method of airgel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The BXDK airgel manufacturing method of the present invention is to use a special BXDK airgel raw material, which itself has been pore-expanded at a temperature of 50-90°C, so that the pore volume reaches 0.7-0.8ml / g, and the pore diameter is 5.0- 7.0nm, and the specific surface area has been controlled at 550-650m 2 / g, and then use a special solution for the first soaking treatment, this solvent can make it re-expand the pores strongly, after 0.5-72 hours of treatment, do the first acid bubble: in the acid solution with a content of 0.1-2.5% Soak for 5 to 15 hours, the purpose is to increase the control specific surface area, and then soak for a second time with a special solution for 0.5 to 36 hours to expand the pores again; Soak for 10-20 hours to improve the control of the specific surface area, so as to obtain the BXDK airgel product. Specific examples are shown in Table 1.

Embodiment 2-6

[0012] The steps of Embodiment 2-6 are the same as Embodiment 1, and its specific parameters are shown in Table 1.

[0013] Table 1: Example of the main process conditions of the airgel manufacturing method and its pore structure

[0014]

[0015] This product is especially suitable for a variety of catalysts and drug carriers, nanostructure adsorption, inorganic adsorption resin and chromatography, hydrophilic or hydrophobic, etc.

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Abstract

The invention relates to a preparation method for aerogel. The preparation method for aerogel overcomes the technical problem that the pore size of conventional macroporous silica gel is not large enough. The preparation method comprises the following steps: (1) primary treatment of an aerogel raw material with a special solution; (2) primary acid dipping; (3) secondary treatment with the special solution; (4) secondary acid dipping; and (5) drying so as to obtain the aerogel product; wherein the special solution is one selected from a group consisting of methanol, glycol and glycerol. The preparation method is extensively applicable to the field of preparation of aerogel.

Description

technical field [0001] The invention relates to the field of silicon chemical industry, in particular to a preparation method of airgel. Background technique [0002] In the prior art, silica gel is generally divided into fine-pore silica gel, coarse-pore silica gel, and macro-pore silica gel according to the different pore diameters. The physical and chemical properties of macroporous silica gel in the prior art are: average pore diameter: 10-45mm, average specific surface area: 250-350㎡ / ɡ, average pore volume: 1.00-2.00mL / ɡ. [0003] At present, the macroporous silica gel indicators mentioned above are far from meeting the various needs of current users, especially the application of various catalysts and carriers, biochemical products, separation and purification of natural products, pharmaceutical preparation, separation of organic compounds and other fields. All applications require silica gel with high specific surface area and large pore volume and pore size. Conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/16
CPCC01B33/16C01P2006/12C01P2006/14C01P2006/16
Inventor 李琳琳孙月竹
Owner RUSHAN DAYANG SILICA GEL FACTORY