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

doi:10.1016/j.cjche.2014.08.004

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

• CHEMICAL ENGINEERING THERMODYNAMICS • Previous Articles Next Articles

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

Cheng Lian^1,2, Dongyan Zhi^2,3, Shouhong Xu², Honglai Liu^1,2

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:2014-12-24 Published:2014-12-28
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.

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

Cheng Lian^1,2, Dongyan Zhi^2,3, Shouhong Xu², Honglai Liu^1,2

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

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.

Abstract

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

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

Cheng Lian, Dongyan Zhi, Shouhong Xu, Honglai Liu. A Molecular Thermodynamic Model for Restricted Swelling Behaviors of Thermo-sensitive Hydrogel[J]. , 2014, 22(11/12): 1307-1313.

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

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

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