NDLI: Effect of Basalt Powder Surface Treatments on Mechanical and Processing Properties of Polylactide-Based Composites

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Effect of Basalt Powder Surface Treatments on Mechanical and Processing Properties of Polylactide-Based Composites

Content Provider	MDPI
Author	Katarzyna, Skórczewska Barczewski, Mateusz Mysiukiewicz, Olga Lewandowski, Krzysztof Nowak, Daniel Matykiewicz, Danuta Andrzejewski, Jacek Piasecki, Adam
Copyright Year	2020
Description	Legislative restrictions and the needs of consumers have created a demand for sustainable materials. Polylactide (PLA) is a biodegradable polyester with advantageous mechanical properties, however, due to its low crystallization rate, it also has low thermomechanical stability. Its range of application temperatures can be widened using nucleating agents and fillers including basalt powder (BP), a waste product from the mining industry. This study analyzed the possibility of enhancing the properties of a PLA-BP composite by chemically treating the filler. Basalt powder was subjected to silanization with 3-aminopropyltriethoxysilane or γ-glycidoxypropyltrimethoxysilane and mixed with PLA at 5–20 wt%. The nucleating effect of a potassium salt of 3,5-bis(methoxycarbonyl) (LAK-301) in the silanized composite was also evaluated. The properties of the materials with silanized BP were compared with the unmodified basalt powder. The miscibility of the filler and the polymer was assessed by oscillatory rheometry. The structure of the composites was studied using scanning electron microscopy and their thermomechanical properties were analyzed using dynamic mechanical thermal analysis. Mechanical properties such as tensile strength, hardness and impact strength, and heat deflection temperature of the materials were also determined. It was concluded that BP-filled nucleated PLA composites presented satisfactory thermomechanical stability without silanization, but chemical treatment could improve the matrix–filler interactions.
Starting Page	5436
e-ISSN	19961944
DOI	10.3390/ma13235436
Journal	Materials
Issue Number	23
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2020-11-29
Access Restriction	Open
Subject Keyword	Materials Characterization and Testing of Materials Pla Poly(lactic Acid) Composite Basalt Surface Modification Mechanical Properties
Content Type	Text
Resource Type	Article

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