NDLI: Poly(lactic acid)/Cellulose Films Produced from Composite Spheres Prepared by Emulsion-Solvent Evaporation Method

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Poly(lactic acid)/Cellulose Films Produced from Composite Spheres Prepared by Emulsion-Solvent Evaporation Method

Content Provider	Semantic Scholar
Author	Sousa, Sónia Costa, Ana Silva, Abílio Simões, Rogério M. S.
Copyright Year	2019
Abstract	The compound of poly(lactic acid) (PLA) and cellulose was made by the emulsion-solvent evaporation technique in order to obtain spheres which are then compression molded to produce a biocomposite film. The effect of the dispersant (poly(vinyl alcohol)-PVA)/PLA ratio on the spheres yield was studied. Moreover, to evaluate the effect of cellulose particle size and surface chemistry on the process yield, unbleached eucalypt kraft pulp and microcrystalline cellulose (MCC), both unmodified and physically or chemically modified were used. PLA/cellulose spheres were characterized regarding its physical properties. It was found that the spheres yield is essentially determined by the PVA/PLA ratio and the percentage of cellulose incorporation is greatly affected by the surface chemistry of cellulose. Regarding the films, DSC runs showed a significant effect of the cellulose type incorporated into PLA matrix on the cold crystallization temperature and on the degree of crystallinity of the biocomposite films. The measurement of tensile properties of the biocomposite films revealed that the strength, elongation at break and toughness (tensile energy absorption at break) of the films incorporating unmodified and chemically modified MCC were substantially improved.
File Format	PDF HTM / HTML
DOI	10.3390/polym11010066
PubMed reference number	30960050
Journal	Medline
Volume Number	11
Alternate Webpage(s)	https://res.mdpi.com/polymers/polymers-11-00066/article_deploy/polymers-11-00066.pdf?attachment=1&filename=
Alternate Webpage(s)	https://doi.org/10.3390/polym11010066
Journal	Polymers
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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