Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (01): 90-93.doi: 10.3866/PKU.WHXB20030121

• Note • Previous Articles    

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

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