Dergi makalesi Açık Erişim
Cabuk, Mehmet; Yavuz, Mustafa; Unal, H. Ibrahim
<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://datacite.org/schema/kernel-4" xsi:schemaLocation="http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4.1/metadata.xsd"> <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/65989</identifier> <creators> <creator> <creatorName>Cabuk, Mehmet</creatorName> <givenName>Mehmet</givenName> <familyName>Cabuk</familyName> </creator> <creator> <creatorName>Yavuz, Mustafa</creatorName> <givenName>Mustafa</givenName> <familyName>Yavuz</familyName> <affiliation>Suleyman Demirel Univ, Fac Arts & Sci, Dept Chem, TR-32200 Isparta, Turkey</affiliation> </creator> <creator> <creatorName>Unal, H. Ibrahim</creatorName> <givenName>H. Ibrahim</givenName> <familyName>Unal</familyName> <affiliation>Gazi Univ, Fac Sci, Dept Chem, Smart Mat Res Lab, Ankara, Turkey</affiliation> </creator> </creators> <titles> <title>Electrokinetic Properties Of Biodegradable Conducting Polyaniline-Graft-Chitosan Copolymer In Aqueous And Non-Aqueous Media</title> </titles> <publisher>Aperta</publisher> <publicationYear>2014</publicationYear> <dates> <date dateType="Issued">2014-01-01</date> </dates> <resourceType resourceTypeGeneral="Text">Journal article</resourceType> <alternateIdentifiers> <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/65989</alternateIdentifier> </alternateIdentifiers> <relatedIdentifiers> <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.colsurfa.2014.02.053</relatedIdentifier> </relatedIdentifiers> <rightsList> <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights> <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights> </rightsList> <descriptions> <description descriptionType="Abstract">In this study, biodegradable and conducting polyaniline-graft-chitosan (PAni-g-CS) copolymer was synthesized by radicalic polymerization using ammonium persulfate (NH4)(2)S2O8 as initiator. The synthesized copolymer was characterized by using particle size, density, band gap, H-1 NMR, TGA, and SEM measurements. The characterization results revealed the successful synthesis of the graft copolymer of PAni and CS. Electrokinetic properties and colloidal stabilities of PAni-g-CS dispersions were examined as a function of time, pH, electrolytes, various surfactants, and temperature by means of zeta-potential measurements in polar (water) and non-polar (silicone oil) media. The zeta-potential of PAni shifted to more positive region after grating with chitosan. In acidic medium, zeta-potential of the copolymer was observed to increase up to +44 mV. The presence of monovalent (Nacl) electrolyte had no impact on zeta-potential of the copolymer dispersions whereas; divalent (BaCl2) and trivalent (AlCl3) electrolytes caused the zeta-potentials of the dispersions to shift to more positive regions. The most effective surfactant on the zeta-potential of the PAni-g-CS was determined to be sodium dodecyl sulfate, which reduced the value of zeta-potential to -39 mV. Elevated temperatures caused almost no change on the zeta-potential of the copolymer dispersions. In non-aqueous media, zeta-potential of PAni-g-CS was found to be in colloidally stable region. Further, PAni-g-CS was tested against Escherichia coli and showed an improved antibacterial activity when compared to that of pristine PAni and CS. (C) 2014 Elsevier B.V. All rights reserved.</description> </descriptions> </resource>
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