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《Journal of Beijing University of Chemical Technology》 2005-01
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Preparation of intelligent calcium alginate/PNIPAAm interpenetrating network hydrogel beads

XU Li xin 1 WANG Xiu fen 1 GAN Ni 1 ZHANG Li qun 2(1.The Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education; 2.Key Laboratory for Nanomaterials,Minstry of Education, Beijing University of Chemical Technology, Beijing 100029,China)  
A thermo and pH sensitive interpenetrating network hydrogels beads were prepared with both calcium alginate and PNIPAAm hydrogels which were synthesized by free radical aqueous solution polymerization using APS(ammonium persulphate)/Na 2S 2O 5(Sodium pyrosulfite) as redox initiators in a simultaneous interpenetrating network process. The effects of the initiator concentration,monomer concentration, NIPAAm/alginate ratio, the solution pH values on the gel swelling performance in different temperatures and pH solutions were discussed. Results show that the IPN hydrogel beads exhibit thermo and pH sensitive swelling ratio characteristics. Therefore, the IPN hydrogels may be useful in the field of controlled drug delivery.
【CateGory Index】: O648
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