Characterisation of Nanoclay and Spelt Husk Microfiller-Modified Polypropylene Composites
Polymers 2022
Madara Žiganova, Remo Merijs-Meri, Jānis Zicāns, Tatjana Ivanova, Ivans Bočkovs, Mārtiņš Kalniņš, Andrzej K. Bledzki, Paulius P. Danilovas

Current research is devoted to the investigation of spelt husk (SH) and nanoclay-modified compatibilised polypropylene (PP) binary and ternary composites for injection-moulding applications. PP composites were obtained using twin-screw extrusion. The content of mechanically milled SH microfiller with aspect ratio within 2 and 6 was fixed at 40 wt.%, whereas the amount of nanoclay functional filler in the polypropylene matrix was changed in the range from 0.5 to 5 wt.%. Nanoclay filler was introduced in the polypropylene matrix either in the form of nanoclay powder (C) or as a masterbatch (M). Regular distribution of the clay nanofiller within the polymer matrix has been observed, disregarding its form and concentration. The effects of the individual or combined addition of SH microreinforcement and nanoclay fillers on the rheological, mechanical, calorimetric, and thermal properties of the developed PP composites were investigated. It is revealed that the addition of the nanoclay fillers insignificantly influences the viscosity of both PP nanocomposites and hybrid composites with SH. Additionally, for PP nanocomposites, remarkable increases in tensile and flexural modules and strength are observed by maintaining considerable ultimate deformations, mainly in the case of M-containing systems. Concomitantly, because of the addition of the nanoclay filler, the improvement in thermal stability of PP nanocomposites and PP hybrid composites with SH is observed. As a result of SH addition, considerable increases in tensile and flexural modules are also observed. Results of the research demonstrate the potential of the use of natural materials (agricultural residues and clay minerals) for the development of PP composites with increased stiffness and thermal properties.

Atslēgas vārdi
biobased polymer composites | mechanical properties | polymer modification | reinforcements | thermal properties

Žiganova, M., Merijs-Meri, R., Zicāns, J., Ivanova, T., Bočkovs, I., Kalniņš, M., Bledzki, A., Danilovas, P. Characterisation of Nanoclay and Spelt Husk Microfiller-Modified Polypropylene Composites. Polymers, 2022, Vol. 14, No. 20, Article number 4332. ISSN 2073-4360. Pieejams: doi:10.3390/polym14204332

Publikācijas valoda
English (en)
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