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Preparation of cellulose nanofibers with hydrophobic surface characteristics
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Kuala Lumpur.
Department of Chemistry, Faculty of Science, University Putra Malaysia.
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2010 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 27, no 2, p. 299-307Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to develop cellulose nanofibers with hydrophobic surface characteristics using chemical modification. Kenaf fibers were modified using acetic anhydride and cellulose nanofibers were isolated from the acetylated kenaf using mechanical isolation methods. Fourier transform infrared spectroscopy (FTIR) indicated acetylation of the hydroxyl groups of cellulose. The study of the dispersion demonstrated that acetylated cellulose nanofibers formed stable, well-dispersed suspensions in both acetone and ethanol. The contact angle measurements showed that the surface characteristics of nanofibers were changed from hydrophilic to more hydrophobic when acetylated. The microscopy study showed that the acetylation caused a swelling of the kenaf fiber cell wall and that the diameters of isolated nanofibers were between 5 and 50 nm. X-ray analysis showed that the acetylation process reduced the crystallinity of the fibers, whereas mechanical isolation increased it. The method used provides a novel processing route for producing cellulose nanofibers with hydrophobic surfaces.

Place, publisher, year, edition, pages
2010. Vol. 27, no 2, p. 299-307
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-9048DOI: 10.1007/s10570-009-9387-9ISI: 000277636800008Scopus ID: 2-s2.0-77952426573Local ID: 79ad5f20-d8e1-11de-bae5-000ea68e967bOAI: oai:DiVA.org:ltu-9048DiVA, id: diva2:981986
Note
Validerad; 2010; 20091124 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Jonoobi, MehdiMathew, Aji P.Oksman, Kristiina

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