物理化学学报 >> 2003, Vol. 19 >> Issue (01): 90-93.doi: 10.3866/PKU.WHXB20030121

研究简报 上一篇    

亲水/疏水半互穿网络凝胶对温度的响应

张建合   

  1. 信阳师范学院化学化工系,信阳 464000
  • 收稿日期:2002-05-15 修回日期:2002-07-18 发布日期:2003-01-15
  • 通讯作者: 张建合 E-mail:jhzhang@xytc.edu.cn

Stimuli-response of Hydrophilic-hydrophobic Semi-IPN Hydrogels on Temperature

Zhang Jian-He   

  1. Department of Chemistry and Chemical Engineering, Xinyang Teachers College, Xinyang 464000
  • Received:2002-05-15 Revised:2002-07-18 Published:2003-01-15
  • Contact: Zhang Jian-He E-mail:jhzhang@xytc.edu.cn

摘要: 研究了一种亲水/疏水型半互穿网水凝胶(PAAc/QPVPD gels)对温度的刺激响应.在弱酸性或弱碱性(pH=7.5)溶液中,该凝胶的溶胀比在低温区(< 28 ℃)随温度的升高微微增大,约在28 ℃出现最大值,然后随温度升高而迅速减小,温度约为32.5 ℃时溶胀比趋于最低值.这主要是由于聚丙烯酸网络(PAAc)中氢键的解离与疏水改性聚电解质N-正十二烷基聚(4-乙烯吡啶)溴化盐(QPVPD)的疏水相互作用共同引起的.

关键词: 水凝胶, 半互穿网络, 温度响应, 溶胀

Abstract: The Stimuli-response of hydrophilic-hydrophobic semi-IPN hydrogels consisting of polyacrylic acid (PAAc)/ poly(N-dodecyl-4-vinyl pyridinium bromide) (QPVPD) with temperature was investigated in weak alkaline and acid solution .Swelling ratio (SR) of the gels increases slowly with the increasing of temperature initially, and reaches a maximum at 28 ℃,then decreases rapidly, and reaches a minimum at 32.5 ℃.This phenomenon is mainly explained by the dissociation of hydrogen bonding in PAAc network and hydrophobic interaction of QPVPD.

Key words: Hydrogel, Semi-IPN, Temperature-response, Swelling