Direct synthesis of temperate sensitive aquogel by ultraviolet radiant polymerization
A temperature-sensitive hydrogel, radiation polymerization technology, applied in the field of polymer material preparation
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Embodiment 1
[0024] 3g monomer (N-isopropylacrylamide), 0.5g monomer (acrylic acid), 0.015g photoinitiator (benzoin dimethyl ether), 0.01g crosslinking agent (N, N'-methylenebispropylene amide) was dissolved in 18 mL of deionized water. The prepared solution was placed in a beaker and exposed to a high-pressure mercury lamp for 10 minutes to obtain a cross-linked polymer. 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
[0026] 3g monomer (N-isopropylacrylamide), 1g monomer (acrylic acid), 0.2g polymer (polyvinyl alcohol), 0.018g photoinitiator (2-methyl-1-[4-(methyl Thiophenyl)-2-morpholinoacetone]), 0.1 g of cross-linking agent (diethylene glycol diacrylate) were dissolved in 23 mL of deionized water. The prepared solution was placed in a beaker and exposed to a high-pressure mercury lamp for 12 minutes to obtain a cross-linked polymer. 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
[0028] 2.5g monomer (N-isopropylacrylamide), 0.3g monomer (acrylic acid), 0.1g polymer (chitosan), 0.03g photoinitiator (α-hydroxyl, α-phenylpropiophenone) , 0.2g cross-linking agent (tripolyethylene glycol diacrylate) was dissolved in 21mL deionized water. The prepared solution was placed in a beaker and exposed to a high-pressure mercury lamp for 15 minutes to obtain a cross-linked polymer. 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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