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Reinforcing capability of cellulose nanocrystals obtained from pine cones in a biodegradable poly(3-hydroxybutyrate)/poly(ε-caprolactone) (PHB/PCL) thermoplastic blend
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0002-2139-7460
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2018 (engelsk)Inngår i: European Polymer Journal, ISSN 0014-3057, E-ISSN 1873-1945, Vol. 104, s. 10-18Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work, different loads (3, 5 and 7 wt%) of pine cone cellulose nanocrystals (CNCs) were added to films of poly(3-hydroxybutyrate)/poly(ε-caprolactone) (PHB/PCL) blends with a composition of 75 wt% PHB and 25 wt% PCL (PHB75/PCL25). The films were obtained after solvent casting followed by melt compounding in an extruder and finally subjected to a thermocompression process. The influence of different CNCs loadings on the mechanical, thermal, optical, wettability and disintegration in controlled compost properties of the PHB75/PCL25 blend was discussed. Field emission scanning electron microscopy (FESEM) revealed the best dispersion of CNCs on the polymeric matrix was at a load of 3 wt%. Over this loading, CNCs aggregates were formed enhancing the films fragilization due to stress concentration phenomena. However, the addition of CNCs improved the optical properties of the PHB75/PCL25 films by increasing their transparency and accelerated the film disintegration in controlled soil conditions. In general, the blend with 3 wt% CNCs offers the best balanced properties in terms of mechanical, thermal, optical and wettability.

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 104, s. 10-18
Emneord [en]
Biodegradability, Cellulose nanocrystals (CNCs), Poly(3-hydroxybutyrate), Poly(ε-caprolactone), Thermoplastic blends
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Identifikatorer
URN: urn:nbn:se:kth:diva-228727DOI: 10.1016/j.eurpolymj.2018.04.036ISI: 000436886800002Scopus ID: 2-s2.0-85046826505OAI: oai:DiVA.org:kth-228727DiVA, id: diva2:1210991
Merknad

QC 201800530

Tilgjengelig fra: 2018-05-30 Laget: 2018-05-30 Sist oppdatert: 2018-07-17bibliografisk kontrollert

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