文献类型：期刊文献

英文题名：Synthesis and properties of electrically-sensitive poly(acrylic acid-co-acetoacetoxy ethyl methacrylate) gels

作者：Jin, Xiachao[1]; Kang, Hongmei[1]; Huang, Yongmin[1]; Liu, Honglai[1]; Hu, Ying[1]

机构：[1] Department of Chemistry, Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, China

年份：2008

卷号：110

期号：6

起止页码：3690

外文期刊名：Journal of Applied Polymer Science

收录：EI(收录号：20085211808646)

语种：英文

外文关键词：Electric fields - Hydrogels - Carboxylic acids - Free radicals - Monomers - Ascorbic acid - Sodium chloride

摘要：A series of electric field, sensitive copolymer P(AA-co-AAEM) gels of acrylic acid. (AA) with acetoacetoxy ethyl methacrylate (AAEM) were prepared by free-radical copolymerization, with N,N-methylene bisacrylamide (MBAAm) and ammounium persulfate (APS) as crosslinking agent and initiator, respectively. The structures and properties of the gels were tunable by changing the monomer feed weighty ratio (R) (R = WAAEM/(WAAEM + WAA) of AAEM and AA. The influences of the NaCl concentration and pH buffer solutions on the equilibrium swelling ratios of the gels were studied in detail. It is shown that both NaCl concentration and pH value of the buffer solution affect the swelling properties of the P(AA-co-AAEM) gels greatly. Moreover, the gel deswelling behavior induced by a direct current electric field was investigated and an excellent electric-sensitivity was found. Among all the samples, the gel with monomer feed weighty ratio (R) = 0.1479 showed the best electrical contraction properties. On the basis of the experimental results, the mechanism of the electricity-induced deswelling behavior was presented. ? 2008 Wiley Periodicals, Inc.