A PHENOMENOLOGICAL MODEL FOR HYDROGELS WITH RIGID SKIN FORMATION

A phenomenological model for stimuli sensitive hydrogels immersed in water subject to changes in temperature is presented and analyzed. In short, the model takes into account conservation of mass and momentum for polymer network and interstitial fluid with an expression for permeability to capture t...

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Bibliographic Details
Published inInternational journal of applied mechanics Vol. 4; no. 1; p. 1250007
Main Authors KURNIA, JUNDIKA CANDRA, BIRGERSSON, ERIK, MUJUMDAR, ARUN S.
Format Journal Article
LanguageEnglish
Published Imperial College Press 01.03.2012
Subjects
stimuli
simulation
PNIPA
mathematical model
rigid skin
temperature
Hydrogel
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Summary:A phenomenological model for stimuli sensitive hydrogels immersed in water subject to changes in temperature is presented and analyzed. In short, the model takes into account conservation of mass and momentum for polymer network and interstitial fluid with an expression for permeability to capture the rigid skin formation during shrinking. The nature of this expression is secured from the observation of and validation with experimental deformation kinetics. Overall, good agreement is achieved between model predictions and their experimental counterparts; the rigid skin formation and rigid core presence are also captured reasonably well. The model can be extended to account for arbitrary-shaped hydrogels as well as for other types of stimuli-sensitive hydrogels that exhibit rigid-skin formation during shrinking.
ISSN:1758-8251
1758-826X
DOI:10.1142/S1758825112001361