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Electronic beam radiopolymerization process of directly synthesizing temperature sensitive hydrogel

A thermosensitive hydrogel, electron beam radiation technology, applied in the field of thermosensitive hydrogel preparation

Inactive Publication Date: 2007-06-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the methods for preparing temperature-sensitive hydrogels at home and abroad are mainly traditional thermal polymerization and γ-ray radiation polymerization. The preparation of temperature-sensitive hydrogels by electron beam radiation polymerization is a new method. At present, there is no patent report in China.

Method used

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  • Electronic beam radiopolymerization process of directly synthesizing temperature sensitive hydrogel
  • Electronic beam radiopolymerization process of directly synthesizing temperature sensitive hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 3.5 g of monomer (N-isopropylacrylamide), 0.3 g of monomer (acrylic acid), 0.1 g of additive (chitosan), 0.25 g of cross-linking agent (tripolyethylene glycol diacrylate) in 21 mL deionized water. The prepared solution is placed in a beaker, and the cross-linked polymer is obtained by electron beam radiation. Put the cross-linked polymer into a Soxhlet extractor and extract it with boiling deionized water for 24 hours, take it out and put it into a vacuum oven to dry to obtain a temperature-sensitive hydrogel.

Embodiment 2

[0027] Dissolve 3.5g monomer (N-isopropylacrylamide), 1.1g monomer (acrylic acid), 0.2g additive (polyvinyl alcohol), 0.15g crosslinking agent (diethylene glycol diacrylate) in 23mL to ionized water. The prepared solution is placed in a beaker, and the cross-linked polymer is obtained by electron beam radiation. Put the cross-linked polymer into a Soxhlet extractor and extract it with boiling deionized water for 24 hours, take it out and put it into a vacuum oven to dry to obtain a temperature-sensitive hydrogel.

Embodiment 3

[0029] 3.5g monomer (N-isopropylacrylamide), 0.5g monomer (acrylic acid), 0.25g monomer (N, N'-dimethylacrylamide), 0.1g additive (chitosan), 0.25 g Crosslinker (tetrapolyethylene glycol diacrylate) was dissolved in 20 mL of deionized water. The prepared solution is placed in a beaker, and the cross-linked polymer is obtained by electron beam radiation. Put the cross-linked polymer into a Soxhlet extractor and extract it with boiling deionized water for 24 hours, take it out and put it into a vacuum oven to dry to obtain a temperature-sensitive hydrogel.

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Abstract

The present invention is electronic beam radiopolymerization process of synthesizing temperature sensitive hydrogel directly, and belongs to the field of temperature sensitive hydrogel preparing technology. Material monomer, cross-linking agent and additive in the weight ratio of 75-98.5 to 0.1-1 to 1-10 are dissolved in deionized water and polymerized through electron radiation to form cross-linked polymer. The cross-linked polymer is then extracted in a Soxhlet extractor with boiled deionized water for 24 hr and dried in a vacuum oven to obtain the temperature sensitive hydrogel. The temperature sensitive hydrogel may be used in medicine controlled releasing system, memory element switch, artificial muscle, chemical separation and other field. The present invention has the features of simple technological process, high polymerization efficiency, less pollution, low cost, normal temperature operation, etc.

Description

technical field [0001] The invention relates to a method for directly synthesizing temperature-sensitive hydrogel by electron beam radiation polymerization, and belongs to the technical field of temperature-sensitive hydrogel preparation methods. Background technique [0002] Stimuli-responsive hydrogels are a type of hydrogels whose properties will change significantly in response to slight physical or chemical stimuli from the external environment. It is a water-insoluble, water-swellable, hydrophilic cross-linked polymer. Stimuli-responsive hydrogels can respond to changes in external environmental factors such as temperature, pH, light, electric and magnetic fields. Due to the potential application value of stimuli-responsive hydrogels in drug controlled release systems, memory element switches, artificial muscles, chemical separation and other fields, it has attracted extensive attention of many scholars at home and abroad. [0003] Using the deformation properties of...

Claims

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Application Information

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IPC IPC(8): C08F2/52C08F20/56C08K5/20
Inventor 阮维青王晓工
Owner TSINGHUA UNIV
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