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Moisture uptake and resulting mechanical response of biobased composites: II. Composites
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-8050-2294
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-5210-4341
2015 (engelsk)Inngår i: Polymer Composites, ISSN 0272-8397, E-ISSN 1548-0569, Vol. 36, nr 8, s. 1510-1519Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The durability of entirely bio-based composites with respect to the exposure to elevated humidity was evaluated. Different combinations of bio-based resins (Tribest, EpoBioX, Envirez) and cellulosic fibers (flax and regenerated cellulose fiber rovings and fabrics) were used to manufacture unidirectional and cross-ply composite laminates. Water absorption experiments were performed at various humidity levels (41%, 70%, and 98%) to measure apparent diffusion coefficient and moisture content at saturation. Effect of chemical treatment (alkali and silane) of fibers as protection against moisture was also studied. However, fiber treatment did not show any significant improvement and in some cases the performance of the composites with treated fibers was lower than those with untreated reinforcement. The comparison of results for neat resins and composites showed that moisture uptake in the studied composites is primarily due to cellulosic reinforcement. Tensile properties of composites as received (RH = 24%) and conditioned (RH = 41%, 70%, and 98%) were measured in order to estimate the influence of humidity on behavior of these materials. Results were compared with data for glass fiber reinforced composite, as a reference material. Previous results from study of unreinforced polymers showed that resins were resistant to moisture uptake. Knowing that moisture sorption is primarily dominated by natural fibers, the results showed that some of the composites with bio-based resins performed very well and have comparable properties with composites of synthetic epoxy, even at elevated humidity.

sted, utgiver, år, opplag, sider
2015. Vol. 36, nr 8, s. 1510-1519
HSV kategori
Forskningsprogram
Polymera konstruktionsmaterial
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URN: urn:nbn:se:ltu:diva-14121DOI: 10.1002/pc.23058ISI: 000358173200017Scopus ID: 2-s2.0-84937162276Lokal ID: d739a4cd-c8d9-4ca3-83d3-9634916c22a1OAI: oai:DiVA.org:ltu-14121DiVA, id: diva2:987075
Merknad

Validerad; 2015; Nivå 2; 20131217 (newdor)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2019-03-04bibliografisk kontrollert

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