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Water absorption and hydrothermal performance of PHBV/sisal biocomposites
a Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV), València, Spain / Departament d’Enginyeria Química, Escola Tècnica Superior d’Enginyeria, Universitat de València, Burjassot, Spain.
KTH, School of Chemical Science and Engineering, Fibre and Polymer Technology, Stockholm, Sweden / Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Thailand.
KTH/ School of Chemical Science and Engineering, Fibre and Polymer Technology, Stockholm.
Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV), Spain / Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, United States.
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2014 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 108, p. 166-174Article in journal (Refereed) Published
Abstract [en]

The performance of biocomposites of poly(hydroxybutyrate-co-valerate) (PHBV) and sisal fibre subjected to hydrothermal tests at different temperatures above the glass transition of PHBV (T-H = 26, 36 and 46 degrees C) was evaluated in this study. The influences of both the fibre content and presence of coupling agent were focused. The water absorption capability and water diffusion rate were considered for a statistical factorial analysis. Afterwards, the physico-chemical properties of water-saturated biocomposites were assessed by Fourier-Transform Infrared Analysis, Size Exclusion Chromatography, Differential Scanning Calorimetry and Scanning Electron Microscopy. It was found that the water diffusion rate increased with both temperature and percentage of fibre, whereas the amount of absorbed water was only influenced by fibre content. The use of coupling agent was only relevant at the initial stages of the hydrothermal test, giving an increase in the diffusion rate. Although the chemical structure and thermal properties of water-saturated biocomposites remained practically intact, the physical performance was considerably affected, due to the swelling of fibres, which internally blew-up the PHBV matrix, provoking cracks and fibre detachment. (C) 2014 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2014. Vol. 108, p. 166-174
Keywords [en]
Hydrothermal degradation, Biocomposites, Poly(hydroxybutyrate-co-valerate) (PHBV), Lignocellulosic fibres, Sisal, Statistical factorial analysis (SFA)
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:his:diva-16608DOI: 10.1016/j.polymdegradstab.2014.04.012ISI: 000343380800020Scopus ID: 2-s2.0-84956613223OAI: oai:DiVA.org:his-16608DiVA, id: diva2:1286960
Conference
4th International Conference on Biodegradable and Biobased Polymers (BIOPOL), OCT 01-03, 2013, Univ Perugia, Rome, ITALY
Available from: 2019-02-08 Created: 2019-02-08 Last updated: 2019-02-15Bibliographically approved

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Karlsson, Sigbritt

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