纳米TiO_2/聚N-异丙基丙烯酰胺复合水凝胶的合成及其表征  

Synthesis and Characterization of Nano-TiO_2/Poly(N-isopropyl- acrylamide) Composite Hydrogels

作　　者：姜宇[1] 刘守信[1] 房喻[1] 王忆娟[1] 陈奋强[1] 张朝阳[1] 

机构地区：[1]应用表面与胶体化学教育部重点实验室陕西师范大学化学与材料科学学院,西安710062

出　　处：《化学学报》2007年第21期2437-2442,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20674048)资助项目.

摘　　要：通过利用偶联剂和超声分散将TiO2表面功能化,在其表面引入烯键,与聚N-异丙基丙烯酰胺在交联剂存在下共聚,制备了不同纳米TiO2含量的聚N-异丙基丙烯酰胺复合水凝胶.采用红外光谱、扫描电镜、紫外光谱、热重分析、动态粘弹谱仪等表征了复合水凝胶的微观结构和形貌,测试了复合凝胶材料对紫外线的吸收、热稳定性、机械强度及其韧性.结果表明:纳米TiO2粒子的引入,使得复合凝胶材料对紫外线吸收效果显著,凝胶的稳定性、机械强度及韧性得到明显改善.The composite hydrogels of poly（N-isopropylacrylamide） with nano-TiO2 were prepared by the coupling copolymerization between N-isopropylacrylamide and the nano-TiO2 particles pre-treated with a silane coupling agent. The N,N′-methylene bisacrylamide was used as the crosslinking agent. The morphology, optical and mechanical properties of the composite hydrogeis were studied by SEM, UV-VIS, FT-IR, and dynamic mechanical analysis （DMA） methods, respectively. The results show that the composite hydrogels had a good absorption of UV and their mechanical strength and toughness were improved markedly.

关 键 词：纳米TIO2 聚N-异丙基丙烯酰胺 复合凝胶材料 紫外吸收 力学性能 

分 类 号：O631.3[理学—高分子化学]