基于原位自由基共聚技术的复合水凝胶制备及表征  

Preparation and Characterization of Composite Hydrogel Based on In-Situ Radical Copolymerization Technology

作　　者：许一婷[1] 邓胡军[1] 宋存峰[1] 曾福泉[1] 何凯斌[1] 罗伟昂[1] 曾碧榕[1] 戴李宗[1] 

机构地区：[1]厦门大学化学化工学院厦门大学材料学院,福建厦门361005

出　　处：《高分子材料科学与工程》2013年第3期128-132,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50903066;51273164);福建省自然科学基金资助项目(2012J01233)

摘　　要：以聚乙二醇与马来酸酐的双酯化产物(MAh-PEG-MAh)、丙烯酰胺(AM)为单体,N,N’-亚甲基双丙烯酰胺(BIS)或对二乙烯基苯(DVB)为交联剂,通过原位自由基共聚法合成了一种复合水凝胶。利用FT-IR、1H-NMR、SEM、TEM表征了凝胶结构和形态;利用XRD研究了凝胶的结晶性;研究了单体用量、分子链段长度、交联剂等因素对凝胶力学性能的影响。研究表明,柔性链段MAh-PEG-MAh以一定尺寸的聚集微区分散于PAM连续相,增强水凝胶的结晶性,且分散相与连续相之间有良好的作用力,当MAh-PEG1K-MAh与AM的物质的量比为1∶8,复合水凝胶的压缩强度达到18.2 MPa左右,力学性能最佳。A kind of composite hydrogel was synthesized by in-situ radical copolymerization using esterified products of polyethylene glycol and maleic anhydride （MAh-PEG-MAh）, and acrylamide （AM） as monomers, N, N- methylenebis（acrylamide） （BIS） or 1,4-divinyl benzene （DVB）as cross-linker. The structure of resultant hydrogel was characterized by FT-IR, 1H-NMR, SEM, TEM and XRD. The influences of the amount of monomers, molecular chain length and cross-linking agent etc on the mechanical strength of composite were studied. Studies show that in the hydrogel prepared from heterogeneous polymerization system using DVB as crosslinker and AIBN as initiator, the flexible segment of MAh-PEG-MAh oggregates as micro-areas with certain size and disperses uniformly in the continuous phase of PAM, the crystallinity of hydrogel increases. Good interaction force between the dispersed phase and continuous phase enables the external forces to be consumed by viscous dissipation or large deformation. When the molar ratio of MAh-PEGIK-MAh to AM is 1 ： 8, the compressive strength of the prepared hydrogel reaches its maximum value about 18.2 MPa.

关 键 词：水凝胶 丙烯酰胺 聚乙二醇 力学强度 马来酸酐 原位共聚 

分 类 号：TQ316[化学工程—高聚物工业]