Journal of Guangdong University of Technology ›› 2010, Vol. 27 ›› Issue (3): 5-8.

• Comprehensive Studies • Previous Articles     Next Articles

A Study of Swelling Properties and Volume Phase Transition of PEGDA／NIPAM Copolymer Hydrogels

  

  1. 1．Faculty of Chemical Engineering and Light Industry，Guangdong University of Technology，Guangzhou 510006，China；
    2．College of Material Science and Engineering，South China University of Technology，Guangzhou 510640，China
  • Online:2010-09-25 Published:2010-09-25

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Abstract: Copolymer hydrogels were synthesized by UV-initiated polymerization of polyethylene glycol diacrylate ester(PEGDA)and N—isopropylacrylamide(NIPAM)，with Irgacure2959 as an initiator．The swelling behavior of hydrogels with diferent mass ratio of monomer was investigated at diferent temperatures and different pH values．And the volume phase transition of hydrogels was tested in the water at diferent temperatures．The results indicate that，the equilibrium water content of the hydrogels increases with the mass contents of NIPAM monomer and the increase of pH value and decreases with the environmental temperature increasing．After NIPAM monomer is introduced into the hydrogels，with the temperature reaching the low critical solution temperature(LCST)，the decreasing of equilibrium water content and swelling ratio accelerates and volume phase transition OCCULTS．The swelling saturation ratio of the hydrogels decreases with the mass contents of NIPAM monomer increasing．Hydrogels increases the delayed swelling performance．

Key words: PEGDA；NIPAM ；hydrogels；swelling properties；volume phase transition

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