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Struktura i svojstva TEMPO-oksidisanih vlakana pamuka

dc.creatorMilanović, Jovana
dc.creatorKostić, Mirjana
dc.creatorŠkundrić, Petar
dc.date.accessioned2021-03-10T11:46:47Z
dc.date.available2021-03-10T11:46:47Z
dc.date.issued2012
dc.identifier.issn1451-9372
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2071
dc.description.abstractIn this paper, the influence of the catalytic oxidation using water soluble and stable nitroxyl radical 2,2',6,6'-tetramethylpiperidine-1-oxyl (TEMPO) on the structure and properties of cotton fibers was studied. In particular, the selective TEMPO-mediated oxidation has become a very interesting way for introduction of functional groups into cellulose fibers with the aim to obtain oxycellulose fibers with specific properties. Unmodified and modified fibers were characterized in terms of weight loss values, introduced functional groups and crystallinity index. Additionally, oxidized fibers were characterized in terms of the sorption, morphological, and physico-mechanical properties. The TEMPO-oxidized cotton fibers show a minimum increase of fineness (from 1.32 to 1.28 dtex) and increase of crystallinity index (up to 91.9%), while the tensile strength of fibers decreases (up to 10.82 cN/tex). By the TEMPO-mediated oxidation of cotton fibers, a significant amount of carboxyl groups (up to 0.795 mmol/g cell) can be introduced into cellulose fibers. Introducing hydrophilic carboxyl groups increases the sorption properties of oxidized fibers, which can be used directly or for further chemical modification.en
dc.description.abstractStruktura i svojstva tempo-oksidisanih vlakana pamuka U ovom radu je proučavan uticaj selektivne oksidacije katalizovane 2,2',6,6'-tetrametilpiperidin-1-oksil radikalom, poznatim kao TEMPO radikal, na strukturu i svojstva vlakana pamuka. TEMPO-oksidacija je postala posebno interesantna za uvođenje funkcionalnih grupa u celulozu, u cilju dobijanja oksiceluloznih vlakana sa specifičnim svojstvima. Nemodifikovana i modifikovana vlakna pamuka okarakterisana su sa aspekta gubitka mase, sadržaja uvedenih funkcionalnih grupa i stepena kristalnosti. Takođe, određena su sorpciona, geometrijska i fizičko-mehanička svojstava vlakana pamuka. Za TEMPOoksidisana vlakna pamuka uočava se minimalno povećanje finoće (1,32-1,28 dtex), a takođe i indeksa kristalnosti (do 91,9 %), dok se prekidna jačina vlakana smanjuje (do 10,82 cN/tex). Oksidacijom pomoću TEMPO radikala postiže se uvođenje značajnih količina karboksilnih grupa (do 0,795 mmol/g celuloze). Usled uvođenja hidrofilnih funkcionalnih grupa dolazi do povećanja hemisorpcionih svojstava oksidisanih vlakana, što se može upotrebiti direktno ili u daljem hemijskom modifikovanju.sr
dc.publisherAssociation of the Chemical Engineers of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172029/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceChemical Industry & Chemical Engineering Quarterly
dc.subjectTEMPO-mediated oxidationen
dc.subjectcotton fibersen
dc.subjectstructureen
dc.subjectsorption and mechanical propertiesen
dc.subjectTEMPO-oksidacijasr
dc.subjectvlakna pamukasr
dc.subjectstrukturasr
dc.subjectsorpcione i mehaničke karakteristikesr
dc.titleStructure and properties of TEMPO-oxidized cotton fibersen
dc.titleStruktura i svojstva TEMPO-oksidisanih vlakana pamukasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage481
dc.citation.issue3
dc.citation.other18(3): 473-481
dc.citation.rankM23
dc.citation.spage473
dc.citation.volume18
dc.identifier.doi10.2298/CICEQ120114024M
dc.identifier.rcubconv_1687
dc.identifier.scopus2-s2.0-84867144674
dc.identifier.wos000313309600014
dc.type.versionpublishedVersion


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