Effects of talc, kaolin and calcium carbonate as fillers in biopolymer packaging materials

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
13
746-758
Series
JOURNAL OF POLYMER ENGINEERING, Volume 41, issue 9
Abstract
We compared the performance of bio-based and biodegradable polymers for packaging applications. Cost-effective inorganic fillers (talc, kaolin and calcium carbonate) were first melt-compounded with polylactic acid (PLA), poly(butylene adipate-co-terephthalate) (PBAT) and poly(hydroxy butyrate-co-valerate) (PHBV). Following this, injection- and compression-molded specimens were produced to test the effect of filler loading (0-30 wt%) in relation to the morphological, thermal, mechanical and barrier properties of the composites. All the fillers were homogeneously dispersed in the polymer matrices and suitable polymer-filler adhesion was observed for talc and kaolin. The elastic modulus increased at the expense of a reduced tensile and elongation. The most significant improvements in water vapor and oxygen barrier properties were achieved with talc in PLA, PBAT and PHBV films. Overall, the results point to the promise of the introduced compositions for food packaging materials.
Description
We wish to thank the assistance of Sai Li with the sample preparation, Päivi Kauppinen with the SEM imaging, Tuula Rautiainen with the WVTR analyzes and Säde Mäki (Tampere University) for conducting the oxygen barrier measurements. Research funding: None declared.
Keywords
barrier, biopolymer, composite, filler, packaging
Other note
Citation
Helanto, K, Talja, R & Rojas, O J 2021, ' Effects of talc, kaolin and calcium carbonate as fillers in biopolymer packaging materials ', JOURNAL OF POLYMER ENGINEERING, vol. 41, no. 9, pp. 746-758 . https://doi.org/10.1515/polyeng-2021-0076