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dc.contributor.authorYang, Zhi
dc.contributor.authorHemar, Yacine
dc.contributor.authorHilliou, loic
dc.contributor.authorGilbert, Elliot P.
dc.contributor.authorMcGillivray, Duncan James
dc.contributor.authorWilliams, Martin A. K.
dc.contributor.authorChaieb, Saharoui
dc.date.accessioned2015-12-21T06:41:25Z
dc.date.available2015-12-21T06:41:25Z
dc.date.issued2015-12-31
dc.identifier.citationNon-Linear Behaviour Of Gelatin Networks Reveals A Hierarchical Structure 2015 Biomacromolecules
dc.identifier.issn1525-7797
dc.identifier.issn1526-4602
dc.identifier.pmid26667303
dc.identifier.doi10.1021/acs.biomac.5b01538
dc.identifier.urihttp://hdl.handle.net/10754/584244
dc.description.abstractWe investigate the strain hardening behaviour of various gelatin networks - namely physically-crosslinked gelatin gel, chemically-crosslinked gelatin gels, and a hybrid gels made of a combination of the former two - under large shear deformations using the pre-stress, strain ramp, and large amplitude oscillation shear protocols. Further, the internal structures of physically-crosslinked gelatin gel and chemically-crosslinked gelatin gels were characterized by small angle neutron scattering (SANS) to enable their internal structures to be correlated with their nonlinear rheology. The Kratky plots of SANS data demonstrate the presence of small cross-linked aggregates within the chemically-crosslinked network, whereas in the physically-crosslinked gels a relatively homogeneous structure is observed. Through model fitting to the scattering data, we were able to obtain structural parameters, such as correlation length (ξ), cross-sectional polymer chain radius (Rc), and the fractal dimension (df) of the gel networks. The fractal dimension df obtained from the SANS data of the physically-crosslinked and chemically crosslinked gels is 1.31 and 1.53, respectively. These values are in excellent agreement with the ones obtained from a generalized non-linear elastic theory we used to fit our stress-strain curves. The chemical crosslinking that generates coils and aggregates hinders the free stretching of the triple helices bundles in the physically-crosslinked gels.
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/10.1021/acs.biomac.5b01538
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Biomacromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/10.1021/acs.biomac.5b01538.
dc.titleNon-Linear Behaviour Of Gelatin Networks Reveals A Hierarchical Structure
dc.typeArticle
dc.contributor.departmentBioscience Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalBiomacromolecules
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Chemical Sciences, The University of Auckland, Private bag 92019, Auckland 1142, New Zealand
dc.contributor.institutionInstitute for Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
dc.contributor.institutionBragg Institute, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
dc.contributor.institutionInstitute of Fundamental Sciences, Massey University, Palmerston North 4442, New Zealand
dc.contributor.institutionThe Riddet Institute, Palmerston North 4442, New Zealand
dc.contributor.institutionThe MacDiarmid Institute, Palmerston North 4442, New Zealand
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personChaieb, Sahraoui
refterms.dateFOA2016-12-14T00:00:00Z
dc.date.published-online2015-12-31
dc.date.published-print2016-02-08


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