Computational Analysis of Influence of Ionic Strength on Smart Hydrogel Subject to Coupled pH-Electric Environmental Stimuli

In this paper, the equilibrium behavior of the smart hydrogels responding to the electric voltage and pH coupled stimuli is simulated by a chemo-electro-mechanical multi-field model, termed the multi-effect-coupling pH-electric-stimuli (MECpHe) model. It consists of coupled nonlinear partial differe...

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Bibliographic Details
Published inMechanics of advanced materials and structures Vol. 17; no. 7; pp. 573 - 583
Main Authors Luo, Rongmo, Li, Hua, Ng, T. Y., Lam, K. Y.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 19.10.2010
Subjects
Computer simulation
Electric potential
electric voltage
Hydrogels
ionic strength
Mathematical models
multiphysics model
pH-electric-sensitive hydrogel
solution pH
Stimuli
Strength
swelling deformation
Voltage
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Summary:In this paper, the equilibrium behavior of the smart hydrogels responding to the electric voltage and pH coupled stimuli is simulated by a chemo-electro-mechanical multi-field model, termed the multi-effect-coupling pH-electric-stimuli (MECpHe) model. It consists of coupled nonlinear partial differential governing equations, which reflect the effects of different chemo-electro-mechanical parameters including the solution pH, externally applied electric voltage and ionic strength on the swelling and bending of the pH-electric-sensitive hydrogels. A numerical comparison is made between the simulation and published experiments and very good agreement is achieved. The influences of ionic strength of surrounding solution on the distributions of electric potential, the fixed charge density, and the displacement and swelling ratio of the hydrogel strip are investigated in detail.
Bibliography:ObjectType-Article-2
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content type line 23
ISSN:1537-6494
1537-6532
DOI:10.1080/15376490903556568