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A three-dimensional transient mixed hybrid finite element model for superabsorbent polymers with straindependent permeability

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Show simple item record Yu, Cong Malakpoor, Kamyar Huyghe, Jacques M. 2018-07-06T14:19:51Z 2018
dc.description peer-reviewed en_US
dc.description.abstract A hydrogel is a cross-linked polymer network with water as solvent. Industrially widely used superabsorbent polymers (SAP) are partially neutralized sodium polyacrylate hydrogel. The extremely large degree of swelling is one of the most distinctive characteristics of such hydrogels, as the volume increase can be about 30 times its original volume when exposed to the physiological solution. The large deformation resulting from the swelling demands a careful numerical treatment. In this work, we present a biphasic continuum-level swelling model using mixed hybrid finite element method (MHFEM) in three dimensions. The hydraulic permeability is highly dependent on swelling ratio, resulting in values that are orders of magnitude apart from each other. The property of local mass conservation of MHFEM contributes to a more accurate calculation of the deformation as the permeability across the swelling gel in a transient state is highly non-uniform. We show that the proposed model is able to simulate the free swelling of a random-shaped gel and squeezing of fluid out of a swollen gel. At last, we make use of the proposed numerical model to study the onset of surface instability in transient swelling. en_US
dc.language.iso eng en_US
dc.publisher Royal Society of Chemistry en_US
dc.relation.ispartofseries Soft Matter;14, pp. 3834-3848
dc.rights © 2018 Royal Society of Chemistry. Personal use of this material is permitted. Permission from Royal Society of Chemistry must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works en_US
dc.subject hydrogel en_US
dc.subject cross-linked polymer network en_US
dc.title A three-dimensional transient mixed hybrid finite element model for superabsorbent polymers with straindependent permeability en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1039/C7SM01587A
dc.contributor.sponsor Technology Foundation STW en_US
dc.relation.projectid 12538 en_US 2019-04-17
dc.embargo.terms 2019-04-17 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US

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