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Effect of surface modification of fibers on the medium density fiberboard properties
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Department of Wood and Paper Sciences and Technology, Faculty of Natural ResourcesUniversity of Tehran.
Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari .
Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari .
Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran.
2017 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Surface modification of mixed hardwoods fibers by sodium hydroxide (NaOH) was conducted to investigate the effect of chemical treatment on the fiber properties along with physico-mechanical characteristics of the medium density fiberboard (MDF). The results indicated that the NaOH treatments can dissolve a portion of hemicelluloses and almost all amount of extractives from the fibers, but it was not strong enough to remove the lignin thoroughly. The FTIR results illustrated that chemical changes can occur during the various NaOH treatments of the fibers. X-ray diffraction analysis revealed that the crystallinity of the studied fibers increased after the alkaline treatment. Investigation of mechanical properties of the MDF showed that modulus of rupture and internal bond strength of the treated samples were decreased compared to the control ones. In addition, water absorption and thickness swelling of treated boards were higher than that of untreated samples. This study indicated that the physico-mechanical properties of the boards were negatively affected by the NaOH treatment.

Place, publisher, year, edition, pages
2017.
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-63911DOI: 10.1007/s00107-017-1207-6OAI: oai:DiVA.org:ltu-63911DiVA: diva2:1108210
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-14

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