Investigating Linear and Nonlinear Viscoelastic behaviour and microstructures of Gelatine-Multiwalled carbon nanotubes composites

Handle URI:
http://hdl.handle.net/10754/583473
Title:
Investigating Linear and Nonlinear Viscoelastic behaviour and microstructures of Gelatine-Multiwalled carbon nanotubes composites
Authors:
Yang, Zhi; Chaieb, Sahraoui ( 0000-0002-8053-3610 ) ; Hemar, Yacine; deCampo, Liliana; Rehm, Christine; McGillivray, Duncan James
Abstract:
We have investigated the linear and nonlinear rheology of various gelatine-multiwalled carbon nanotube (gel-MWNT) composites, namely physically-crosslinked-gelatine gel-MWNT composites, chemically-crosslinked-gelatine gel-MWNT composites, and chemically-physically-crosslinked-gelatine gel-MWNT composites. Further, the internal structures of these gel-MWNT composites were characterized by ultra-small angle neutron scattering and scanning electron microscopy. The adsorption of gelatine onto the surface of MWNT is also investigated to understand gelatine-assisted dispersion of MWNT during ultrasonication. For all gelatine gels, addition of MWNT increases their complex modulus. The dependence of storage modulus with frequency for gelatine-MWNT composites is similar to that of the corresponding neat gelatine matrix. However, by incorporating MWNT, the dependence of the loss modulus on frequency is reduced. The linear viscoelastic region is decreased approximately linearly with the increase of MWNT concentration. The pre-stress results demonstrate that the addition of MWNT does not change the strain-hardening behaviour of physically-crosslinked gelatine gel. However, the addition of MWNT can increase the strain-hardening behaviour of chemically-crosslinked gelatine gel, and chemically-physically crosslinked gelatine gel. Results from light microscopy, cryo-SEM, and USANS demonstrate the hierarchical structures of MWNT, including that tens-of-micron scale MWNT agglomerates are present. Furthermore, the adsorption curve of gelatine onto the surface of MWNT follows two-stage pseudo-saturation behaviour.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Investigating Linear and Nonlinear Viscoelastic behaviour and microstructures of Gelatine-Multiwalled carbon nanotubes composites 2015 RSC Adv.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
RSC Adv.
Issue Date:
1-Dec-2015
DOI:
10.1039/C5RA22744E
Type:
Article
ISSN:
2046-2069
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA22744E
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorYang, Zhien
dc.contributor.authorChaieb, Sahraouien
dc.contributor.authorHemar, Yacineen
dc.contributor.authordeCampo, Lilianaen
dc.contributor.authorRehm, Christineen
dc.contributor.authorMcGillivray, Duncan Jamesen
dc.date.accessioned2015-12-09T12:48:37Zen
dc.date.available2015-12-09T12:48:37Zen
dc.date.issued2015-12-01en
dc.identifier.citationInvestigating Linear and Nonlinear Viscoelastic behaviour and microstructures of Gelatine-Multiwalled carbon nanotubes composites 2015 RSC Adv.en
dc.identifier.issn2046-2069en
dc.identifier.doi10.1039/C5RA22744Een
dc.identifier.urihttp://hdl.handle.net/10754/583473en
dc.description.abstractWe have investigated the linear and nonlinear rheology of various gelatine-multiwalled carbon nanotube (gel-MWNT) composites, namely physically-crosslinked-gelatine gel-MWNT composites, chemically-crosslinked-gelatine gel-MWNT composites, and chemically-physically-crosslinked-gelatine gel-MWNT composites. Further, the internal structures of these gel-MWNT composites were characterized by ultra-small angle neutron scattering and scanning electron microscopy. The adsorption of gelatine onto the surface of MWNT is also investigated to understand gelatine-assisted dispersion of MWNT during ultrasonication. For all gelatine gels, addition of MWNT increases their complex modulus. The dependence of storage modulus with frequency for gelatine-MWNT composites is similar to that of the corresponding neat gelatine matrix. However, by incorporating MWNT, the dependence of the loss modulus on frequency is reduced. The linear viscoelastic region is decreased approximately linearly with the increase of MWNT concentration. The pre-stress results demonstrate that the addition of MWNT does not change the strain-hardening behaviour of physically-crosslinked gelatine gel. However, the addition of MWNT can increase the strain-hardening behaviour of chemically-crosslinked gelatine gel, and chemically-physically crosslinked gelatine gel. Results from light microscopy, cryo-SEM, and USANS demonstrate the hierarchical structures of MWNT, including that tens-of-micron scale MWNT agglomerates are present. Furthermore, the adsorption curve of gelatine onto the surface of MWNT follows two-stage pseudo-saturation behaviour.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA22744Een
dc.rightsArchived with thanks to RSC Adv.en
dc.titleInvestigating Linear and Nonlinear Viscoelastic behaviour and microstructures of Gelatine-Multiwalled carbon nanotubes compositesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalRSC Adv.en
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealanden
dc.contributor.institutionThe Riddet Institute, Palmerston North, New Zealanden
dc.contributor.institutionBragg Institute, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australiaen
dc.contributor.institutionMacDiarmid Institute for Advanced Materials and Nanotechnology, PO Box 600, Wellington 6140, New Zealanden
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorChaieb, Sahraouien
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