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Design of high-toughness polyacrylamide hydrogels by hydrophobic modification

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dc.contributor.authorABDURRAHMANOĞLU, SUZAN
dc.contributor.authorsAbdurrahmanoglu, Suzan; Can, Volkan; Okay, Oguz
dc.date.accessioned2022-03-12T17:37:58Z
dc.date.available2022-03-12T17:37:58Z
dc.date.issued2009
dc.description.abstractPolyacrylamide (PAAm) hydrogels possessing a very large extensibility at break have been prepared via micellar crosslinking copolymerization of acrylamide monomer and N,N'-methylenebis(acrylamide) crosslinker in the presence of hydrophobic comonomers. N-butyl-, N-hexyl-, N-octyl-, and N,N-dihexylacrylamides were used as the hydrophobes in the hydrogel preparation. Incorporation of hydrophobes with an alkyl chain length x > 4 results in an increase in the loss factor tan 6 of hydrogels due to the formation of temporary junction zones inside the gel network. The number N-H of the hydrophobes per hydrophobic block together with the alkyl chain length x of the pendant hydrophobic group were used to tune the loss factor of the hydrogels over two orders of magnitude. Tensile mechanical measurements show that increasing N-H or x also increases the degree of toughness of PAAm hydrogels. Keeping constant the hydrophobe level (20 mol%) at an alkyl chain length x=6, increasing N-H from 9 to 30 increased the elongation ratio at break from 125 to 250%. Hydrogels exhibiting a high toughness, i.e., about 300% elongation ratio at break were obtained by modification of PAAm network chains with 10 mol% N-octylacrylamide. (C) 2009 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.polymer.2009.09.042
dc.identifier.eissn1873-2291
dc.identifier.issn0032-3861
dc.identifier.urihttps://hdl.handle.net/11424/229434
dc.identifier.wosWOS:000271496200015
dc.language.isoeng
dc.publisherELSEVIER SCI LTD
dc.relation.ispartofPOLYMER
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectHydrogels
dc.subjectToughness
dc.subjectElasticity
dc.subjectMULTISTICKER ASSOCIATIVE POLYELECTROLYTES
dc.subjectTRANSIENT NETWORK THEORY
dc.subjectMICELLAR COPOLYMERIZATION
dc.subjectNANOCOMPOSITE HYDROGELS
dc.subjectRHEOLOGICAL PROPERTIES
dc.subjectBEHAVIOR
dc.subjectGELS
dc.subjectPROPERTY
dc.subjectSTRENGTH
dc.subjectFRACTURE
dc.titleDesign of high-toughness polyacrylamide hydrogels by hydrophobic modification
dc.typearticle
dspace.entity.typePublication
local.avesis.ida98a0b1e-87a2-4cfc-96d5-89c8ef578e75
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages7
oaire.citation.endPage5455
oaire.citation.issue23
oaire.citation.startPage5449
oaire.citation.titlePOLYMER
oaire.citation.volume50
relation.isAuthorOfPublicationc4f5249d-7638-47df-be54-950af42ffa85
relation.isAuthorOfPublication.latestForDiscoveryc4f5249d-7638-47df-be54-950af42ffa85

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