光化学合成P(DMAA-co-MMA)/Nano-SiO_2复合水凝胶及其性能研究  

Photochemical Synthesis and Characterization of P(DMAA-co-MMA)/Nano-SiO_2 Complex Hydrogels

作　　者：刘晓暄[1] 王洪波[2] 白迎坤[2] 吴光国[2] 

机构地区：[1]广东工业大学材料与能源学院高分子材料与工程系,广东广州510006 [2]汕头大学理学院化学系,广东汕头515063

出　　处：《感光科学与光化学》2007年第6期436-444,共9页Photographic Science and Photochemistry

基　　金：国家自然科学基金(20474036);教育部科学技术重大研究项目(02114);广东省自然科学研究项目(021241)资助

摘　　要：以N,N-二甲基丙烯酰胺(DMAA)及甲基丙烯酸甲酯(MMA)为单体,Irgacure 2959为光引发剂,N,N′-二甲基双丙烯酰胺(Bis)为交联剂,利用紫外光引发自由基聚合制备了聚N,N′-二甲基丙烯酰胺(PDMAA)及P(DMAA-co-MMA)水凝胶,并通过加入少量表面改性后的纳米SiO2对该水凝胶进行改性,制得了P(DMAA-co-MMA)/纳米SiO2复合水凝胶,用FT-IR和SEM对产物进行了表征,同时研究该复合凝胶的溶胀动力学、消溶胀动力学、pH值响应性、离子强度等.该方法简便、快捷,大大缩短了聚合时间,合成过程仅需2—3 min.Poly（N,N＇-dimethylacrylamide） and P（DMAA-co-MMA） copolymer hydrogels have been prepared by the photochemical synthesis,the process of photo-polymerization was completed within 3 minutes.P（DMAA-MMA）/nano-SiO2 complex hydrogels were prepared by the radical graft copolymerization of N,N＇-dimethylacrylamide and a bit of MMA onto the surface of nano-SiO2 particles whose surface were modified.Irgacure 2959 was used as photo-initiator and N,N＇-methylene bisacrylamide（Bis） was used as the cross-linking agent.The products were characterized by FT-IR and SEM.Swelling dynamics,water release behavior,ionic strength sensitive and pH-sensitive performances of the hydrogels were discussed.

关 键 词：聚N N-二甲基丙烯酰胺 温敏性水凝胶 纳米SIO2 pH值敏感性 

分 类 号：TQ316.3[化学工程—高聚物工业]