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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (19): 1841-1846. 上一篇    下一篇

研究论文

水溶性β-环糊精聚合物和疏水改性聚丙烯酰胺的主客体相互作用

李姝静1，吴飞鹏*,1，李妙贞1，王尔鑑1，毛诗珍2，杜有如2   

  1. (1中国科学院理化技术研究所 北京 100101)
    (2中国科学院武汉物理与数学研究所 波谱与原子分子物理国家重点实验室 武汉 430071)
  • 投稿日期:2005-01-10 修回日期:2005-07-04 发布日期:2010-12-10
  • 通讯作者: 吴飞鹏

Host-guest Interaction between Water-soluble β-Cyclodextrin Polymer and Hydrophobically Modified Polyacryla-mide

LI Shu-Jing1, WU Fei-Peng*,1, LI Miao-Zhen1, WANG Er-Jian1, MAO Shi-Zhen2, DU You-Ru2   

  1. (1 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101)
    (2 State Key Laboratory of Magnetic and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences, Wuhan 430071)
  • Received:2005-01-10 Revised:2005-07-04 Published:2010-12-10
  • Contact: WU Fei-Peng

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主体环糊精聚合物(β-CDE)与客体疏水改性丙烯酰胺共聚物P(AM/POEA)构成超分子结构的高分子识别体系. 这种客体聚合物是含有少量疏水体(xPOEA＜0.01)的水溶性聚合物, NMR测定结果表明β-CDE和P(AM/POEA)的主客体相互作用是通过环糊精空腔和疏水体POEA形成包结络合物进行的. 在P(AM/POEA)聚合物水溶液中加入β-CDE, 由于主客体聚合物相互作用出现粘度的大幅上升, 增粘的幅度可通过改变聚合物浓度和疏水体含量来调节, 同时对盐浓度和温度的影响也进行了研究. 通过透射电镜直观观察的结果表明, 此类缔合聚合物体系的主客体相互作用生成实心球状多分子聚集体.

关键词: 包结缔合物, 主客体相互作用, β-环糊精聚合物, 疏水改性聚丙烯酰胺, 多分子聚集体

A supramolecular recognizing system was constructed based on the water-soluble β-cyclodextrin polymer (β-CDE) as host and hydrophobically modified polyacrylamide P(AM/POEA) as guest. Such guest polymer is a water soluble polymer containing a small amount of hydrophobe (xPOEA＜0.01). The results of NMR measurement indicated that the host-guest interaction between β-CDE and P(AM/POEA) was carried out through the formation of inclusion complexes between cyclodextrin cavity and the hydrophobe POEA. High viscosity enhancements were observed when β-CDE was added to P(AM/POEA) solutions as a result of the polymer inclusion association, which can be controlled by varying the polymer concentration and hydrophobe content. The influ-ences of salt concentration and temperature on the viscosity of mixture solution were also studied. The TEM images dem-onstrated that the host-guest interaction between β-CDE and P(AM/POEA) led to the formation of multi-polymeric aggregate with solid sphere structure.

Key words: inclusion complex, host-guest interaction, β-cyclodextrin polymer, hydrophobically modified polyacryla-mide, multimolecular aggregate