高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (6): 1542.doi: 10.7503/cjcu20121163

• 高分子化学 • 上一篇    下一篇

基于MBA凝胶纤维的RAFT聚合制备聚合物微米管

李麒, 唐黎明, 梁勇   

  1. 清华大学化工系, 先进材料教育部重点实验室, 北京 100084
  • 收稿日期:2012-12-26 出版日期:2013-06-10 发布日期:2013-05-09
  • 通讯作者: 唐黎明,男,博士,教授,博士生导师,主要从事高分子化学方面的研究.E-mail:tanglm@tsinghua.edu.cn E-mail:tanglm@tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 21174079, 20874055)和国家"八六三"计划项目(批准号: 2009AA062903)资助.

Preparation of Polymer Microtubes via RAFT Polymerization of N,N'-Methylene Bisacrylamide Gel Fibers

LI Qi, TANG Li-Ming, LIANG Yong   

  1. Key Laboratory of Advanced Materials, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-12-26 Online:2013-06-10 Published:2013-05-09

PDF (PC)

被引次数

8

摘要：

以三乙二醇双丙烯酸酯(TEGDA)为共聚单体, 通过可逆加成-断裂链转移(RAFT)聚合反应, 将N,N'-亚甲基双丙烯酰胺(MBA)凝胶纤维直接转化为聚合物微米管. 用扫描电子显微镜(SEM)、 透射电子显微镜(TEM)、 红外光谱(FTIR)和元素分析等表征了聚合物微米管的结构和组成. 研究结果表明, TEGDA的加入可显著提高聚合物微米管的产率, 并使其具有自支撑性. 环境扫描电子显微镜(ESEM)原位表征结果表明, 聚合物微米管具有一定的溶剂溶胀性能. 采用流变仪测定了加入TEGDA前后的聚合物凝胶的机械性能, 相对于MBA凝胶, 聚合物凝胶的机械性能显著提高.

关键词: 三乙二醇双丙烯酸酯, 可逆加成-断裂链转移聚合, 凝胶, 纤维, 聚合物微米管

Abstract:

Polymer microtubes were fabricated by copolymerizing N,N'-methylene bisacrylamide(MBA) organogel fibers and triethylene glycol diacrylate(TEGDA) via reversible addition-fragmentation chain transfer(RAFT) polymerization. The tubular structure and compositions of the polymer microtubes were demonstrated by scanning electron microscopy(SEM), transmission electron microscopy(TEM), Fourier transform infrared(FTIR) spectrometer and elemental analysis. In presence of TEGDA, the yield of the polymer microtubes was enhanced significantly and the resulting tubes had self-supporting ability. The in-situ observation of the polymer microtubes by environmental scanning electron microscopy(ESEM) indicated the swelling property of the tubes in solvent. The mechanical properties of the gels were measured by a rheometer. The results show that the storage modulus(G') and loss modulus(G") of the polymer gel are much higher than those of the MBA organogel.

Key words: Triethylene glycol diacrylate, Reversible addition-fragmentation chain transfer polymerization, Gel, Fiber, Polymer microtube

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