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Influence of mild alkaline treatment on the cellulosic surfaces active sites

2012Journal article Open access
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dc.contributor.authorAshori, Alireza
dc.contributor.authorOrnelas, Mariana
dc.contributor.authorSheshmani, Shabnam
dc.contributor.authorCordeiro, Nereida
dc.date.accessioned2021-05-04T08:49:22Z
dc.date.available2021-05-04T08:49:22Z
dc.date.issued2012
dc.description.abstractAgro-residues fibers are inexpensive environmentally friendly alternatives to synthetic fibers in fiber reinforced polymer composites. The natural fiber properties and bondability with adhesive can be modified by subjecting the fibers to a pre-treatment procedure. The knowledge ofthe modified fibers sur face properties is essential to explain and predict their applications. The present study is focused on the effect of alkaline treatment on the surface characteristics of stalk fibers from rapeseed, tobacco, cotton, lemon balm and kiwi. The chemical composition of fibers and Fourier transform infrared spectroscopy show components extraction and the X-ray diffraction show improvement in the crystallinity index of the treated fibers. But only the IGC analysis allows us to know in detail the alterations on the fiber surface and the effect on the adhesion of the fibers. IGC shows that alkaline treatment produces changes in the nature and number of the active sites, responsible for the physico-chemical activity of the surface of the fibers. The fiber hydrophobicity was improved by the increase of more energetic and active sites in the surface. Also,the creation of new basic active sites and removal of acidic active sites from the fiber surface due to alkaline treatment has been clearly shown.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAshori, A., Ornelas, M., Sheshmani, S., & Cordeiro, N. (2012). Influence of mild alkaline treatment on the cellulosic surfaces active sites. Carbohydrate polymers, 88(4), 1293-1298.pt_PT
dc.identifier.doi10.1016/j.carbpol.2012.02.008pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3351
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAgro-residues fiberspt_PT
dc.subjectAlkaline treatmentpt_PT
dc.subjectInverse gas chromatographypt_PT
dc.subjectSurface propertiespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleInfluence of mild alkaline treatment on the cellulosic surfaces active sitespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1298pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage1293pt_PT
oaire.citation.titleCarbohydrate Polymerspt_PT
oaire.citation.volume88pt_PT
person.familyNamecordeiro
person.givenNamenereida
person.identifier1612636
person.identifier.ciencia-id521A-0F62-EA39
person.identifier.orcid0000-0001-6006-3415
person.identifier.ridO-2253-2019
person.identifier.scopus-author-id7004319456
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3d02b657-c48c-4f56-813a-1284b81960f3
relation.isAuthorOfPublication.latestForDiscovery3d02b657-c48c-4f56-813a-1284b81960f3

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