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Preparation of homogeneous hydrogels by controlling the crosslinker reactivity and availability

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dc.contributor.authorABDURRAHMANOĞLU, SUZAN
dc.contributor.authorsAbdurrahmanoglu, Suzan; Okay, Oguz
dc.date.accessioned2022-03-12T17:34:44Z
dc.date.available2022-03-12T17:34:44Z
dc.date.issued2008
dc.description.abstractNetwork microstructures of polyacrylamide (PAAm) hydrogels were investigated by static light scattering measurements. The gels were prepared by free-radical crosslinking polymerization of acrylamide (AAm). To suppress the degree of gel inhomogeneity, the crosslinker reactivity during gelation was controlled by decreasing its availability in the reaction system. Our first approach was the addition of the crosslinker N,N'-methylenebis(acrylamide) (BAAm) in one or three portions during the course of the gelation reactions. As a second approach, a slightly water soluble crosslinker, namely ethylene glycol dimethacrylate (EGDM) was used as a crosslinker in AAm polymerization. Due to the low water solubility of EGDM, EGDM phase in the gelation system act as a reservoir of crosslinker so that the crosslinker can be supplied continuously to the aqueous reaction zone during the course of gelation. It was found that the delayed crosslinker addition technique further increases the degree of inhomogeneity of PAAm hydrogels. The results were explained with increasing viscosity of the reaction solution at the time of the crosslinker addition so that the crosslinking reactions are limited to local regions in the reaction system. The second approach, namely use of the slightly water soluble crosslinker EGDM significantly increases the degree of structural homogeneity of PAAm hydrogels.
dc.identifier.doi10.1080/10601320802223176
dc.identifier.issn1060-1325
dc.identifier.urihttps://hdl.handle.net/11424/229064
dc.identifier.wosWOS:000257526100012
dc.language.isoeng
dc.publisherTAYLOR & FRANCIS INC
dc.relation.ispartofJOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjecthomogeneous hydrogels
dc.subjectinhomogeneity
dc.subjectlight scattering
dc.subjectgelation
dc.subjectANGLE NEUTRON-SCATTERING
dc.subjectSPATIAL INHOMOGENEITY
dc.subjectPOLYACRYLAMIDE HYDROGELS
dc.subjectLINKING COPOLYMERIZATION
dc.subjectPOLYMER GELS
dc.subjectTEMPERATURE
dc.titlePreparation of homogeneous hydrogels by controlling the crosslinker reactivity and availability
dc.typearticle
dspace.entity.typePublication
local.avesis.id932a0232-cd32-42d5-93e2-ba3025ee6bc4
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages7
oaire.citation.endPage775
oaire.citation.issue9
oaire.citation.startPage769
oaire.citation.titleJOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
oaire.citation.volume45
relation.isAuthorOfPublicationc4f5249d-7638-47df-be54-950af42ffa85
relation.isAuthorOfPublication.latestForDiscoveryc4f5249d-7638-47df-be54-950af42ffa85

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