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Method for preparing polyrotaxane cross-linker based on beta-cyclodextrin and product

A technology of β-cyclodextrin and cyclodextrin, which is applied in the field of cross-linking agent preparation, can solve the problems of limited application, general number of double bonds, cumbersome preparation methods, etc., and achieve enhanced reactivity, reduced preparation cost, and increased introduction amount Effect

Inactive Publication Date: 2020-02-04
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

It shows that the number of double bonds introduced is average, and the reactivity of itaconic anhydride and hydroxyl groups is not high; and the raw material α-cyclodextrin used in the preparation is relatively expensive, which limits its further application
[0006] In view of the cumbersome preparation method of the existing water-soluble polyrotaxane crosslinking agent, it is necessary to find a method to increase the amount of double bonds introduced into the water-soluble polyrotaxane crosslinking agent, which has stronger reactivity and lower preparation cost. field is very necessary

Method used

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  • Method for preparing polyrotaxane cross-linker based on beta-cyclodextrin and product
  • Method for preparing polyrotaxane cross-linker based on beta-cyclodextrin and product
  • Method for preparing polyrotaxane cross-linker based on beta-cyclodextrin and product

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Embodiment

[0027] 1. Preparation of polyrotaxane crosslinking agent based on β-cyclodextrin

[0028] Prepare the polyrotaxane crosslinking agent according to the following steps:

[0029] 1) Preparation of polyetheramine / β-cyclodextex precision polyrotaxane (PEA-(β-CD) pseudopolyrotaxane)

[0030] Weigh 10.0g β-CD and 3.0g PEA and dissolve in 900mL distilled water, then stir at room temperature for 24h, and wash with distilled water for several times to remove free β-CD and polymer during microporous membrane filtration, and finally place in an oven at 60°C Dry for 12 hours to obtain white PEA-(β-CD) pseudopolyrotaxane.

[0031] 2) Preparation of PEA-(β-CD)-MAH polyrotaxane crosslinking agent

[0032] Weigh 2.2036 g of PEA-(β-CD) pseudopolyrotaxane and 2.0561 g of MAH prepared in step 1), and then add them to 30 mL of chloroform, and reflux in a constant temperature water bath at 60°C for 10 h. After the reaction is completed, cool to room temperature , filtered with a microporous mem...

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Abstract

The invention discloses a method for preparing a polyrotaxane cross-linker based on beta-cyclodextrin. The method comprises the steps of firstly, preparing polyetheramine / beta-cyclodextrin quasi-polyrotaxane by using beta-cyclodextrin and polyetheramine, and then, preparing the polyetheramine / beta-cyclodextrin / maleic anhydride polyrotaxane cross-linker by further using the polyetheramine / beta-cyclodextrin quasi-polyrotaxane and maleic anhydride. Compared with the prior art, the method disclosed by the invention has the advantages that the intake of double bonds of the prepared water-soluble polyrotaxane cross-linker is increased, the reaction activity is enhanced, and the preparation cost can be reduced.

Description

technical field [0001] The invention belongs to the field of crosslinking agent preparation, and in particular relates to a method and product for preparing polyrotaxane crosslinking agent based on β-cyclodextrin. Background technique [0002] A cross-linking agent is a chemical agent that can cross-link polymers. It can generate chemical bonds between linear polymer chains, and make linear polymer chains connect to each other to form a three-dimensional network structure. [0003] At present, a molecular formula of traditional chemical cross-linking agents has two or more double bonds. When cross-linking occurs, the cross-linking points are fixed. Due to the randomness of the cross-linking process, it is inevitable that the cross-linking points will be in the gel. The uneven distribution in space makes the length of the polymer chain segment between each cross-linking point different. The crosslinking point of the polyrotaxane crosslinking agent is not fixed, and the cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/16
CPCC08B37/0015
Inventor 张鹏王文哲杨子腾代雅兴张春权李婷邓博廖文平周成裕贾振福
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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