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dc.creatorŠešlija, Sanja
dc.creatorSpasojević, Pavle
dc.creatorPanić, Vesna
dc.creatorDobrzynska-Mizera, Monika
dc.creatorImmirzi, Barbara
dc.creatorStevanović, Jasmina
dc.creatorPopović, Ivanka
dc.date.accessioned2021-03-10T13:50:48Z
dc.date.available2021-03-10T13:50:48Z
dc.date.issued2018
dc.identifier.issn0141-8130
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4000
dc.description.abstractPresent study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.en
dc.publisherElsevier, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS//
dc.rightsrestrictedAccess
dc.sourceInternational Journal of Biological Macromolecules
dc.subjectPectin esterificationen
dc.subjectHydrophobicityen
dc.subjectSurface tensionen
dc.titlePhysico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward applicationen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage932
dc.citation.other113: 924-932
dc.citation.rankaM21
dc.citation.spage924
dc.citation.volume113
dc.identifier.doi10.1016/j.ijbiomac.2018.03.006
dc.identifier.pmid29518441
dc.identifier.rcubconv_5584
dc.identifier.scopus2-s2.0-85043395025
dc.identifier.wos000432503100106
dc.type.versionpublishedVersion


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