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N-异丙基丙烯酰胺凝胶在乙醇水溶液中的溶胀平衡

许小平a; HUTHER Andreasb; MAURER Gerdb   

  1. a Department of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
    b Lehrstuhl fur Technische Thermodynamik, Universitat Kaiserslautern, Postfach 3049, 67663
    Kaiserslautern, Germany
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-06-28 发布日期:2003-06-28
  • 通讯作者: 许小平

The Swelling Equilibria of N-isopropylacrylamide Based Hydrogel in Aqueous Solution of
Ethanol

XU Xiaopinga; HUTHER Andreasb; MAURER Gerdb   

  1. a Department of Chemical Engineering, Fuzhou University, Fuzhou 350002, China
    b Lehrstuhl fur Technische Thermodynamik, Universitat Kaiserslautern, Postfach 3049, 67663
    Kaiserslautern, Germany
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-06-28 Published:2003-06-28
  • Contact: XU Xiaoping

摘要: N-isopropylacrylamide (NIPAAm) was used to synthesize NIPAAm homopolymer (nonionized)
andNIPAAm-sodium methacrylate copolymer (ionized). The swelling equilibria for both gels
were obtained in aqueoussolution of ethanol with concentration ranging from 0 to 100%(by
mass) at 25℃. The swollen gel in water shrankfirst with the addition of a small amount of
ethanol and then reswelled with further addition of ethanol showing notonly a discontinuous
volume phase transition but also a typical reentrant phenomenon. A thermodynamic modelbased
on the UNIQUAC with the "free-volume" contribution was applied to correlate and predict the
swellingbehavior of the poly(NIPAAM)-gels in ethanol-water mixture.

关键词: hydrogel;swelling;poly(N-isopropylacrylamide);model

Abstract: N-isopropylacrylamide (NIPAAm) was used to synthesize NIPAAm homopolymer (nonionized)
andNIPAAm-sodium methacrylate copolymer (ionized). The swelling equilibria for both gels
were obtained in aqueoussolution of ethanol with concentration ranging from 0 to 100%(by
mass) at 25℃. The swollen gel in water shrankfirst with the addition of a small amount of
ethanol and then reswelled with further addition of ethanol showing notonly a discontinuous
volume phase transition but also a typical reentrant phenomenon. A thermodynamic modelbased
on the UNIQUAC with the "free-volume" contribution was applied to correlate and predict the
swellingbehavior of the poly(NIPAAM)-gels in ethanol-water mixture.

Key words: hydrogel, swelling, poly(N-isopropylacrylamide), model