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Semi-IPN of biopolyurethane, benzyl starch, and cellulose nanofibers: Structure, thermal and mechanical properties
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
Number of Authors: 22016 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 133, no 45, article id 43726Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to develop bionanocomposites of biopolyurethane (PU), benzyl starch (BS), and cellulose nanofibers (CNF) with semi-interpenetrating polymer network (S-IPN) structure of improved properties. Morphology, thermal and mechanical properties of S-IPN blends and nanocomposites were studied and compared with the neat polymers. Microscopy study showed that PU and BS were partially miscible as well as CNF were dispersed in both PU and BS phases in the nanocomposites. Dynamic mechanic thermal analysis demonstrated that BS decreased the tan δ peak of the PU while CNF increased it. The positive shifting of tan δ peak in the S-IPN nanocomposite also indicated the presence of CNF in the PU phase. It was also noticed that S-IPN nanocomposite displayed two tan δ peaks at higher temperature, indicating molecular interaction among BS, PU, and CNF. Furthermore, the S-IPN nanocomposites displayed significantly higher E-modulus and tensile strength compared with the neat PU

Place, publisher, year, edition, pages
2016. Vol. 133, no 45, article id 43726
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-6524DOI: 10.1002/app.43726ISI: 000383358500010Scopus ID: 2-s2.0-84983347858Local ID: 4bffcd7e-aa96-415d-99fc-8b3a6531000bOAI: oai:DiVA.org:ltu-6524DiVA, id: diva2:979410
Note

Validerad; 2016; Nivå 2; 20160429 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Haque, MD Minhaz UlOksman, Kristiina

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