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Self-healing hydrogels formed in catanionic surfactant solutions

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dc.contributor.authorABDURRAHMANOĞLU, SUZAN
dc.contributor.authorsAkay, Gizem; Hassan-Raeisi, Azadeh; Tuncaboylu, Deniz C.; Orakdogen, Nermin; Abdurrahmanoglu, Suzan; Oppermann, Wilhelm; Okay, Oguz
dc.date.accessioned2022-03-12T18:11:40Z
dc.date.available2022-03-12T18:11:40Z
dc.date.issued2013
dc.description.abstractPhysical gels with remarkable properties were obtained by copolymerization of acrylamide with the hydrophobic monomer stearyl methacrylate (C18) in a micellar solution of cetyltrimethylammonium bromide (CTAB) containing up to 15 mol% sodium dodecyl sulfate (SDS). The addition of SDS causes the CTAB micelles to grow and thus enables solubilization of C18. The gels exhibit time-dependent dynamic moduli, high elongation ratios at break (1800-5000%), and self-healing, as evidenced by rheological and mechanical measurements and substantiated by dynamic light scattering. As the size of the micelles in the gelation solution increases, both the degree of temporary spatial inhomogeneity and the lifetime of hydrophobic associations in the gels increase while the elongation ratio at break decreases. Although the physical gels were insoluble in water due to strong hydrophobic interactions, they could be solubilized in surfactant solutions thus providing a means of characterization of the network chains. Viscometric and rheological behaviors of polymer solutions show a substantial increase in the associativity of the network chains with rising micelle size, which results in prolonged lifetime of hydrophobic associations acting as physical cross-links in gels. The internal dynamics of self-healing gels could thus be controlled by the associativity of the network chains which in turn depends on the size of CTAB micelles.
dc.identifier.doi10.1039/c2sm27515e
dc.identifier.issn1744-683X
dc.identifier.urihttps://hdl.handle.net/11424/231470
dc.identifier.wosWOS:000313896900019
dc.language.isoeng
dc.publisherROYAL SOC CHEMISTRY
dc.relation.ispartofSOFT MATTER
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDYNAMIC LIGHT-SCATTERING
dc.subjectSODIUM DODECYL-SULFATE
dc.subjectMULTISTICKER ASSOCIATIVE POLYELECTROLYTES
dc.subjectHYDROPHOBICALLY-MODIFIED HYDROGELS
dc.subjectHIGH MECHANICAL STRENGTH
dc.subjectCETYLTRIMETHYLAMMONIUM BROMIDE
dc.subjectRHEOLOGICAL PROPERTIES
dc.subjectAGGREGATION BEHAVIOR
dc.subjectWORMLIKE MICELLES
dc.subjectAQUEOUS MIXTURES
dc.titleSelf-healing hydrogels formed in catanionic surfactant solutions
dc.typearticle
dspace.entity.typePublication
local.avesis.id7422f3b7-a106-4d2d-ae65-76da25f4b042
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages8
oaire.citation.endPage2261
oaire.citation.issue7
oaire.citation.startPage2254
oaire.citation.titleSOFT MATTER
oaire.citation.volume9
relation.isAuthorOfPublicationc4f5249d-7638-47df-be54-950af42ffa85
relation.isAuthorOfPublication.latestForDiscoveryc4f5249d-7638-47df-be54-950af42ffa85

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