ICCAS OpenIR
Comparison of the multiphasic model and the transport model for the swelling and deformation of polyelectrolyte hydrogels
Feng, Ligang1; Jia, Yuxi1,2; Li, Xue3; An, Lijia2
2011-10-01
Source PublicationJOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
ISSN1751-6161
Volume4Issue:7Pages:1328-1335
AbstractPolyelectrolyte hydrogel is a ternary mixture of water, polymer network and mobile ions. The present paper examined two popular models describing the swelling and deformation behaviors of polyelectrolyte hydrogels, i.e. the multiphasic model and the transport model. The water flow, the network deformation and the ionic diffusion are coupled in the multiphasic model, and the gradient of the fluid pressure is taken as the driving force for the network deformation. However, the water flow is neglected in the transport model with the ionic osmotic pressure taking the role of fluid pressure. Two simplified experiments, i.e. the free swelling of a hydrogel sphere in response to the concentration change of the external salt solution and the bending deformation of a hydrogel strip under an external electric field, are simulated by the two models. Simulation shows that the two models lead to the same predictions for the swelling equilibrium of the hydrogel sphere but different predictions for the swelling kinetics of the hydrogel sphere and the deformation of the hydrogel strip under the external electric field. These are due to the fact that the two models are equivalent in thermodynamic equilibrium situations, but in thermodynamic non-equilibrium situations, the transport model is no longer applicable as it neglects the water flow in the hydrogel and takes the ionic osmotic pressure as a mechanical parameter to play the role of swelling pressure. The present work will be helpful for understanding the hydrodynamics of polyelectrolyte hydrogels and the application of the two models. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordPolyelectrolyte Hydrogel Hydrodynamics Multiphasic Model Transport Model
DOI10.1016/j.jmbbm.2011.05.001
Indexed BySCI
Language英语
WOS IDWOS:000294187500042
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72378
Collection中国科学院化学研究所
Corresponding AuthorJia, Yuxi
Affiliation1.Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
3.Univ Jinan, Sch Chem & Chem Engn, Jinan 250022, Peoples R China
Recommended Citation
GB/T 7714
Feng, Ligang,Jia, Yuxi,Li, Xue,et al. Comparison of the multiphasic model and the transport model for the swelling and deformation of polyelectrolyte hydrogels[J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,2011,4(7):1328-1335.
APA Feng, Ligang,Jia, Yuxi,Li, Xue,&An, Lijia.(2011).Comparison of the multiphasic model and the transport model for the swelling and deformation of polyelectrolyte hydrogels.JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,4(7),1328-1335.
MLA Feng, Ligang,et al."Comparison of the multiphasic model and the transport model for the swelling and deformation of polyelectrolyte hydrogels".JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 4.7(2011):1328-1335.
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