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A kind of preparation method of airgel

A technology of airgel and hydrogel, which is applied in the field of preparation of β-cyclodextrin polymer airgel, can solve problems such as few reports, and achieve low cost, short gel time and high porosity Effect

Active Publication Date: 2019-12-13
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the development and application of aerogels prepared from β-cyclodextrin.

Method used

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  • A kind of preparation method of airgel
  • A kind of preparation method of airgel
  • A kind of preparation method of airgel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve an appropriate amount of β-cyclodextrin in deionized water at 90°C, recrystallize it twice, and then dry it to constant weight at 105°C.

[0025] (2) Weigh 2 g of β-cyclodextrin after recrystallization and drying treatment, while weighing an appropriate amount of epichlorohydrin, sodium hydroxide and polyethylene glycol in proportion. Add β-cyclodextrin to the sodium hydroxide solution and stir it magnetically at 55-60℃ until it is completely dissolved; then add polyethylene glycol to the solution and stir it magnetically at 55-60℃ until it is completely dissolved; finally Add epichlorohydrin dropwise and stir magnetically at 55-60°C until hydrogel is formed. In the above solution system, the ratio of the glucose unit of β-cyclodextrin to the amount of epichlorohydrin is 1:1, and the ratio of the amount of polyethylene glycol to β-cyclodextrin is 1:3, The ratio of the amount of epichlorohydrin to sodium hydroxide is 1:1, the molecular weight of polyethylene g...

Embodiment 2

[0029] In this embodiment, the molecular weight of polyethylene glycol is 1000; the ratio of the amount of glucose unit of β-cyclodextrin to the amount of epichlorohydrin is 1:2; and the rest of the treatment is the same as in Example 1.

Embodiment 3

[0031] In this embodiment, the ratio of the amount of β-cyclodextrin glucose unit to the amount of epichlorohydrin is 1:2; the ratio of the amount of polyethylene glycol to β-cyclodextrin is 1:4; the rest The processing is the same as in Example 1.

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Abstract

The invention discloses a method for preparing aerogel with beta-cyclodextrin polymers. The method includes sequentially adding secondarily re-crystallized beta-cyclodextrin, polyethylene glycol and epichlorohydrin into sodium hydroxide solution and carrying out stirring reaction until hydrogel is formed; carrying out cold storage and soaking treatment on the hydrogel; carrying out freezing and freeze-drying treatment on the hydrogel to obtain the aerogel. The method has the advantages that processes are flexible, simple and convenient and are low in cost and short in gelation time; the polyethylene glycol is used as a soft-segment polymer, accordingly, the properties of the aerogel with the beta-cyclodextrin polymers further can be regulated and controlled, the apparent density of the aerogel prepared by the aid of the method can be regulated and controlled in the range of 0.1-0.7 g / cm<3>, and the aerogel is of a stable gel skeleton structure; the aerogel is high in porosity and has large specific surface areas and basic three-dimensional network structures, the catalytic, recognition, inclusion and sustained-release capacity of cyclodextrin can be kept, and the aerogel has specific adsorption capacity for aromatic organic matters such as toluene and aniline.

Description

Technical field: [0001] The invention relates to gel material technology, in particular to a method for preparing a β-cyclodextrin polymer aerogel. Background technique: [0002] Aerogel is currently the lightest condensed material in synthetic materials. The hydrogel undergoes a specific drying process to remove the solvent of the network structure and keep the network skeleton structure from collapsing. In addition to extremely low apparent density, aerogels also have the characteristics of high porosity, high specific surface area, and extremely low thermal conductivity. Due to these special structures and outstanding characteristics, they have broad application prospects in many fields. , Such as thermal insulation materials, sound insulation materials, optical devices, supercapacitors, etc. In addition, aerogels are also used in aerospace, adsorbents, catalysis and life sciences. [0003] β-Cyclodextrin is a kind of truncated cone-shaped cyclic oligosaccharide with host and g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08G81/00C08B37/16
CPCC08B37/0012C08G81/00C08J9/28C08J2305/16C08J2387/00
Inventor 刘泽华徐力武伟高嘉雯周文琴贾盼
Owner TIANJIN UNIV OF SCI & TECH