The Phase Transition Model for Heat-Shrinkable Thermo-Sensitive Hydrogels Based on Interaction Energy. (22nd January 2015)

• Record Type: Journal Article
• Authors: Peng, Qiujin; Zhang, Hui; Zhang, Zhengru
• Is Part Of: Communications in computational physics. Volume 17:Number 2(2015:Feb.)
• Page Start: 594
• Page End: 614
• Publication Date: 2015-01-22
• Subjects: 76A05, -- 76T99, -- 35Q92, -- 92E10; Heat-shrinkable thermo-sensitive hydrogels, -- volume phase transition, -- free energy, -- Flory lattice theory, -- group contribution method, -- conservation law equations; Mathematical physics -- Data processing -- Periodicals; Physics -- Data processing -- Periodicals; 530.150285
• DOI: 10.4208/cicp.050414.061014a
• Languages: English
• ISSNs: 1815-2406

Abstract

Abstract: A biphase mixture continuum mechanics model is derived for neutral heat-shrinkable thermo-sensitive hydrogels in this paper. The mixing free energy of the special mixture is recalculated based on the partition function of Bose system, and it evaluates the contribution of the hydrophilic, hydrophobic interaction and hydrogen bonding to the volume phase transition behaviors. The ideas of the Flory lattice theory and the UNIFAC group contribution method are employed to get the expression of the mixing free energy. Then we deduce a particular model by combining this mixing free energy with the conservation laws equations and constitutive relations of both phases to predict the volume transition behaviors of these special hydrogels.