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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (21): 2437-2442. 上一篇    下一篇

研究论文

纳米TiO2/聚N-异丙基丙烯酰胺复合水凝胶的合成及其表征

姜宇，刘守信*，房喻，王忆娟，陈奋强，张朝阳   

  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)
  • 投稿日期:2007-04-13 修回日期:2007-05-24 发布日期:2007-11-14
  • 通讯作者: 刘守信

Synthesis and Characterization of Nano-TiO2/Poly(N-isopropylacrylamide) Com-posite Hydrogels

JIANG Yu; LIU Shou-Xin*; FANG Yu; WANG Yi-Juan; CHEN Fen-Qiang; ZHANG Zhao-Yang   

  1. (Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062)
  • Received:2007-04-13 Revised:2007-05-24 Published:2007-11-14
  • Contact: LIU Shou-Xin

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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.

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

The composite hydrogels of poly(N-isopropylacrylamide) with nano-TiO2 were pre-pared 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 hydrogels 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.

Key words: nano-TiO2, poly(N-isopropylacrylamide), composite hydrogel, UV absorption, mechanical property