Abstract
Sodium acrylate-crosslinker (polyethyleneglycol dimethacrylate or diethyleneglycol dimethacrylate) copolymers were synthesized by photopolymerization and γ-ray-induced polymerization. The copolymer gels had large hydrophilicity. The electrically-responsive changes in weight were studied by sandwiching them between the two electrodes and applying repeatedly the electric field. Both the copolymer gels showed the reversible weight change in response to the on-off switching of the electric field. The response of the copolymer gel with polyethyleneglycol dimethacrylate is sharper than that of the copolymer with diethyleneglycol dimethacrylate. Release of methylene blue a model drug from the copolymer gels was found to occur intermittently in response to the on-off switching. The intermittent release was attributed to the squeezing effect due to the shrinkage of polyelectrolyte gels caused by electrophoretic movement of polymeric anions.
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Schedule a callMore From: International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry
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