SCI和EI收录∣中国化工学会会刊

›› 2014, Vol. 22 ›› Issue (11/12): 1307-1313.DOI: 10.1016/j.cjche.2014.08.004

• 化工热力学 • 上一篇    下一篇

A Molecular Thermodynamic Model for Restricted Swelling Behaviors of Thermo-sensitive Hydrogel

Cheng Lian1,2, Dongyan Zhi2,3, Shouhong Xu2, Honglai Liu1,2   

  1. 1 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China;
    3 School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
  • 收稿日期:2013-05-22 修回日期:2013-07-02 出版日期:2014-12-28 发布日期:2014-12-24
  • 通讯作者: Shouhong Xu
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21076071, 21276074), the 111 Project of the Ministry of Education of China (B08021) and the Fundamental Research Funds for the Central Universities of China.

A Molecular Thermodynamic Model for Restricted Swelling Behaviors of Thermo-sensitive Hydrogel

Cheng Lian1,2, Dongyan Zhi2,3, Shouhong Xu2, Honglai Liu1,2   

  1. 1 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China;
    3 School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2013-05-22 Revised:2013-07-02 Online:2014-12-28 Published:2014-12-24
  • Supported by:
    Supported by the National Natural Science Foundation of China (21076071, 21276074), the 111 Project of the Ministry of Education of China (B08021) and the Fundamental Research Funds for the Central Universities of China.

摘要: A molecular thermodynamic model was developed for describing the restricted swelling behavior of a thermosensitive hydrogel confined in a limited space. The Gibbs free energy includes two contributions, the contribution of mixing of polymer and solvent calculated by using the lattice model of randompolymer solution, and the contribution due to the elasticity of polymer network. This model can accurately describe the swelling behavior of restricted hydrogels under uniaxial and biaxial constraints by using twomodel parameters. One is the interaction energy parameter between polymer network and solvent, and the other is the size parameter depending on the degree of cross-linking. The calculated results show that the swelling ratio reduces significantly and the phase transition temperature decreases slightly as the restricted degree increases, which agree well with the experimental data.

关键词: Thermo-sensitive hydrogel, Restricted swelling, Phase equilibrium, Molecular thermodynamic model

Abstract: A molecular thermodynamic model was developed for describing the restricted swelling behavior of a thermosensitive hydrogel confined in a limited space. The Gibbs free energy includes two contributions, the contribution of mixing of polymer and solvent calculated by using the lattice model of randompolymer solution, and the contribution due to the elasticity of polymer network. This model can accurately describe the swelling behavior of restricted hydrogels under uniaxial and biaxial constraints by using twomodel parameters. One is the interaction energy parameter between polymer network and solvent, and the other is the size parameter depending on the degree of cross-linking. The calculated results show that the swelling ratio reduces significantly and the phase transition temperature decreases slightly as the restricted degree increases, which agree well with the experimental data.

Key words: Thermo-sensitive hydrogel, Restricted swelling, Phase equilibrium, Molecular thermodynamic model