Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/5156
DC FieldValueLanguage
dc.contributor.authorValente, A. J. M.-
dc.contributor.authorPolishchuk, A. Ya.-
dc.contributor.authorBurrows, H. D.-
dc.contributor.authorMiguel, M. G.-
dc.contributor.authorLobo, V. M. M.-
dc.date.accessioned2008-09-01T15:04:55Z-
dc.date.available2008-09-01T15:04:55Z-
dc.date.issued2003en_US
dc.identifier.citationEuropean Polymer Journal. 39:9 (2003) 1855-1865en_US
dc.identifier.urihttps://hdl.handle.net/10316/5156-
dc.description.abstractThe sorption and diffusion processes of anionic surfactants with different chain length through polyacrylamide hydrogels with low swelling degree have been studied by electrical conductivity measurements. The multicomponent equilibrium equation has been used to model the sorption isotherms of different anionic surfactant in the hydrogels. Such isotherms show that initial rapid sorption of unimer surfactant into the membranes occurs, suggesting that non-freezing water can be involved in these interactions. In aqueous solution, at concentrations near and above the critical micelle concentration an anti-co-operative region is found. The diffusion coefficients of the anionic surfactants inside the hydrogel matrix show that the mobility of diffusing surfactant entities is dependent on cross-linker concentration and chain length. The Cukier hydrodynamic model and the free volume theory as modified by Peppas and Reinhart were applied to explain the dependence of the diffusion coefficients of surfactant on surfactant concentration inside the hydrogel. The hydrodynamic model was applied with success to the more hydrophilic surfactant, sodium 1-octanesulfonate, showing that the diffusion coefficients, D, increase when the resistance to hydrodynamic medium decreases; when the surfactant chain length increases (sodium dodecyl sulfate and sodium 1-hexadecane sulphonate) the variation of D with the free volume can only be understood considering the sieving effect produced by the surfactant inside gel.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TWW-48TM93Y-4/1/cd15a2b758be12fc526c852e9f961956en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectHydrogelsen_US
dc.subjectPolyacrylamideen_US
dc.subjectIonic surfactantsen_US
dc.subjectDiffusion coefficientsen_US
dc.titleSorption/diffusion behaviour of anionic surfactants in polyacrylamide hydrogels: from experiment to modellingen_US
dc.typearticleen_US
dc.identifier.doi10.1016/S0014-3057(03)00108-3-
uc.controloAutoridadeSim-
item.openairetypearticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.fulltextCom Texto completo-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-4612-7686-
crisitem.author.orcid0000-0003-3127-2298-
crisitem.author.orcid0000-0002-1601-5501-
crisitem.author.orcid0000-0002-5318-3280-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
filec3dbf7b493e44264bf5f42f07675bc7c.pdf360.04 kBAdobe PDFView/Open
Show simple item record

SCOPUSTM   
Citations

11
checked on Mar 18, 2024

WEB OF SCIENCETM
Citations

12
checked on Mar 2, 2024

Page view(s)

343
checked on Mar 26, 2024

Download(s)

266
checked on Mar 26, 2024

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.