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Cross-linked polyvinyl alcohol (PVA) foams reinforced with cellulose nanocrystals (CNCs)
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. University of Oulu.ORCID iD: 0000-0003-4762-2854
2016 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 23, no 3, p. 1925-1938Article in journal (Refereed) Published
Abstract [en]

Poly(vinyl alcohol) (PVA) foams reinforced with cellulose nanocrystals (CNCs) were prepared with formaldehyde as a crosslinking agent. Two initial reaction times (10, 120 s) and the addition of CNCs (0–2 wt% based on total reaction suspension) were found to affect the foam density, water uptake, morphology and mechanical properties. A longer initial reaction time resulted in higher mechanical properties and density, due to the small pore size. The addition of CNCs induced a progressive decrease in the pore diameter and an increase in the foam density, as well as improved mechanical properties. With 1.5 wt% CNC content, the compressive strength of the PVA foams was significantly improved from 7 to 58 kPa for 10 s-initial reaction time and from 65 to 115 kPa for 120 s-initial reaction time. Results showed that the cross-linked PVA foams with CNC had promising properties for use in biomedical applications.

Place, publisher, year, edition, pages
2016. Vol. 23, no 3, p. 1925-1938
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-5524DOI: 10.1007/s10570-016-0925-yISI: 000376086900034Scopus ID: 2-s2.0-84962160928Local ID: 3a67d773-9512-46c4-ba41-18b5d09dc042OAI: oai:DiVA.org:ltu-5524DiVA, id: diva2:978398
Note

Validerad; 2016; Nivå 2; 20160418 (andbra)

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

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Song, TaoTanpichai, SupachokOksman, Kristiina

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