Surface properties of Reactive Yellow 2 immobilised pHEMA and HEMA/chitosan membranes: characterisation of their selectivity to different proteins

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dc.contributor.authorArica, MY
dc.contributor.authorYilmaz, M
dc.contributor.authorYalcin, E
dc.contributor.authorBayramoglu, G
dc.date.accessioned2020-06-25T17:40:04Z
dc.date.available2020-06-25T17:40:04Z
dc.date.issued2004
dc.departmentKırıkkale Üniversitesi
dc.description.abstractPoly(hydroxyethyl methacrylate), pHEMA, and a composite pHEMA/chitosan networks were synthesized in the membrane form via UV initiated photo-polymerisation in the presence of an initiator alpha,alpha'-azoisobutyronitrile. Reactive Yellow 2 (RY-2) was covalently immobilised as a dye-ligand onto both membranes. The polarity and surface energy of the investigated membranes were determined by contact angle measurement. The incorporation of chitosan in the pHEMA networks produced more hydrophilic surface, as indicated by contact angle analysis. The binding characteristics of lysozyme, gamma-globulins, human serum albumin (HSA) and bovine serum albumin (BSA) to pHEMA-RY-2 and pHEMA/chitosan-RY-2 affinity membranes have been investigated from aqueous solution and their dye-ligand free forms were used as control systems. When chitosan was incorporated in the pHEMA network as a cationic polymer led to higher adsorption capacity for the lysozyme. Selective adsorption behaviour was also observed in the case of pHEMA/chitosan-RY-2 membrane for the lysozyme. The non-specific adsorptions of the lysozyme on the pHEMA and pHEMA/chitosan membranes were about 1.9 and 7.2 mg/ml, respectively. These were negligible for all others investigated proteins. The lysozyme adsorption data was analysed using the first-order and the second-order models. The first-order equation in both affinity membrane systems is the most appropriate equation to predict the adsorption capacities of the adsorbents. The adsorption isotherms well fitted the combined Langmuir-Freundlich model. A theoretical analysis has been conducted to estimate the thermodynamic contributions (changes in enthalpy, entropy and Gibbs free energy) for the adsorption of lysozyme to both dye-ligand immobilised membranes. The adsorption capacities of both dye-ligand immobilised membranes increased with increasing the temperature while decreased with increasing the NaCl concentration. Both affinity membranes are stable when subjected to sanitization with sodium hydroxide after repeated separation-elution cycles. (C) 2004 Elsevier B.V. All rights reserved.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.memsci.2004.05.005
dc.identifier.endpage178en_US
dc.identifier.issn0376-7388
dc.identifier.issn1873-3123
dc.identifier.issue1-2en_US
dc.identifier.scopus2-s2.0-3142634639
dc.identifier.scopusqualityQ1
dc.identifier.startpage167en_US
dc.identifier.urihttps://doi.org/10.1016/j.memsci.2004.05.005
dc.identifier.urihttps://hdl.handle.net/20.500.12587/3242
dc.identifier.volume240en_US
dc.identifier.wosWOS:000223160200017
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevieren_US
dc.relation.ispartofJournal Of Membrane Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectpHEMAen_US
dc.subjectchitosanen_US
dc.subjectreactive dyeen_US
dc.subjectdye-liganden_US
dc.subjectadsorptionen_US
dc.subjectpurificationen_US
dc.subjectlysozymeen_US
dc.subjectgamma-globulinsen_US
dc.subjectHASen_US
dc.subjectBSAen_US
dc.subjectcontact angleen_US
dc.subjectsurface energyen_US
dc.subjectthermodynamic parametersen_US
dc.titleSurface properties of Reactive Yellow 2 immobilised pHEMA and HEMA/chitosan membranes: characterisation of their selectivity to different proteinsen_US
dc.typeArticle

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