Composite aerogel material and preparation method, multiple recycling method, multifunctional composite aerogel material and application thereof

A composite airgel and multi-functional technology, applied in the direction of airgel preparation, chemical instruments and methods, organic compound/hydride/coordination complex catalyst, etc., can solve complex steps and do not involve post-treatment of adsorbent materials Problems, difficult to control and other problems, to achieve the effect of good adsorption performance

Active Publication Date: 2017-08-25
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material involves the synthesis of nanocrystals and the subsequent adsorption of nanocrystals into an organic framework. The steps are relatively complicated and difficult to control, which is not conducive to large-scale production and further promotion.
In addition, none of the above reports involved the post-treatment of adsorbent materials.

Method used

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  • Composite aerogel material and preparation method, multiple recycling method, multifunctional composite aerogel material and application thereof
  • Composite aerogel material and preparation method, multiple recycling method, multifunctional composite aerogel material and application thereof
  • Composite aerogel material and preparation method, multiple recycling method, multifunctional composite aerogel material and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0060] The invention provides a kind of preparation method of composite airgel material, comprises the following steps:

[0061] 1) mixing the nanowire and the water-soluble polymer aqueous solution to obtain a mixed solution;

[0062] 2) The mixed solution obtained in the above steps is oriented frozen, and then freeze-dried to obtain a composite airgel material.

[0063] The selection and ratio of raw materials in the above-mentioned preparation method of the present invention, as well as the corresponding optimization principles, etc., if not specified, correspond to the selection and ratio of raw materials in the aforementioned composite airgel material, and the corresponding optimization principles, etc., in This will not repeat them one by one.

[0064] In the invention, firstly, the nanowire and the aqueous solution of the water-soluble high molecular polymer are mixed to obtain a mixed solution.

[0065] In the present invention, the source of the nanowires is not pa...

Embodiment 1

[0108] Preparation of sodium alginate-xonotlite nanowire composite airgel material:

[0109] Preparation of sodium alginate solution:

[0110] Weigh 5.0g sodium alginate powder in a 250ml beaker, and measure 245ml deionized water in the beaker, use mechanical stirring, 300rpm, 12h, finally obtain a uniform 2% (20mg / ml) sodium alginate solution, place The refrigerator freezer is ready for use.

[0111] Preparation of xonotlite nanowires:

[0112] Weigh 23.615g of calcium nitrate tetrahydrate into a 250ml beaker, measure 200mL of deionized water into the beaker, and stir for 20min to obtain a clear solution. Weigh 28.42g of sodium metasilicate nonahydrate into a 500ml beaker, add 200mL of deionized water, and stir for 20min with a magnet to obtain a clear solution. Under the condition of vigorous stirring, slowly drop the calcium nitrate tetrahydrate solution into the sodium silicate solution to obtain a white emulsion, continue to stir vigorously for 1 hour, then move the wh...

Embodiment 2

[0127] Sodium alginate-xonotlite airgel material adsorption of heavy metal ions:

[0128] 25 mL of solutions with concentrations of ferric ions, copper ions, barium ions, and lead ions at a concentration of 0.1 M were respectively configured in a 50 mL beaker. The airgel material obtained by the freeze-drying method in Example 1 was equally divided into four parts, and put into the beakers filled with four kinds of metal ion solutions respectively, and the solution was stirred slowly, and the adsorption time was 1.5 h. And take out 0.5ml of the sample solution every 5min, 15min, 45min, and 90min respectively, and conduct the inductively coupled plasma concentration test.

[0129] The adsorption process of the sodium alginate-xonotlite composite airgel material in Example 2 of the present invention was detected and characterized.

[0130] see Figure 4 , Figure 4 It is a photograph of the appearance of the airgel material after the sodium alginate-xonotlite composite airgel...

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Abstract

The invention provides a composite aerogel material and a preparation method, multifunctional recycling method, multifunctional composite aerogel material and application thereof. By adopting the combination of a water-soluble high-molecular polymer and a nanowire, an organic-inorganic composite aerogel material rich in multi-active sites shows the excellent adsorption performance of heavy metal ions. Complex production equipment is not needed, the method is simple and easy to implement, the time and labor are saved, and industrial large-scale production is easy to achieve. Accordingly, on the overall design ideas, the purpose of aiming at design of a new structure and performance study of materials is achieved, the subsequent processing process and the reuse angle of the material are created, composite aerogel absorbed with the metal ions is converted into a functional material, the new function of the material is further performed, requirements in multiple aspects are met, multistage utilization of the material is embodied in the overall technical scheme, and then the use efficiency and the recycling series are improved.

Description

technical field [0001] The invention relates to the technical field of preparation and application of micro- and nano-scale materials, in particular to a composite airgel material, a preparation method and a multifunctional reuse method thereof, a multifunctional composite airgel material and application. Background technique [0002] Airgel, also known as xerogel, is a solid material form, a highly dispersed solid material that is composed of colloidal particles or polymer molecules aggregated into a nanoporous network structure, and filled with a gaseous dispersion medium in the pores , is also one of the solids with the lowest density in existing materials. There are many types of aerogels, including silicon-based, carbon-based, sulfur-based, metal oxide-based or metal-based, etc. The common aerogel is silicon-based aerogel. As long as the gel of any substance can be dried to remove the internal solvent, and can basically keep its shape unchanged, and the product has hig...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/24B01J20/28B01J20/30C02F1/28B01J31/26
CPCB01J13/0091B01J20/04B01J20/24C02F1/281C02F1/286B01J20/28047B01J31/26B01J35/39B01J35/23B01J35/33
Inventor 俞书宏陈思铭高怀岭
Owner UNIV OF SCI & TECH OF CHINA
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