Utilization of Waste Marble Dust in Poly(Lactic Acid)-Based Biocomposites: Mechanical, Thermal and Wear Properties

Abstract

The aim of this present work was to study the applicability of waste marble dust (MD) in poly(lactic acid) (PLA)-based composites. Samples containing up to 20 wt% waste MD were prepared via melt blending. The attention was focused on the investigation of mechanical, morphological, thermal properties and the wear resistance of the PLA/MD composites. Regarding the mechanical properties, both the tensile and the flexural modulus improved remarkably, however, a slight loss was observed in strength and deformability. The impact toughness showed an increasing tendency up to 10 wt% MD loading, which was followed by a marginal decrease at higher concentration. With respect to the sliding wear rate, the composite with the highest MD content showed the best wear resistance. According to the DSC measurements, the MD hampered the chain mobility of PLA, thereby reducing the crystalline ratio. Overall, composites with improved properties were developed, while the reuse of waste MD is expected to reduce the production costs as well.

Physical, mechanical, and thermal properties ofDalbergia sissoowood waste‐filled poly(lactic acid) composites

“…These worn surface morphologies can affect the mechanical properties of the manufactured composites as reported in the literature. [18,19,22,44] The morphology observed in Figure 8B for 2.5 wt% wood waste-filled composite did not show significant microstructural differences in comparison to Figure 8A of bare PLA. The fracture surface has some pores, microcracks with some gap between the wood waste particles and PLA matrix.…”

“…corn starch instead of natural gas or oil feedstocks. [18,19] It shows closely identical mechanical and physical properties compared to synthetic polymers; therefore adopted for various applications including biomedical, textile, and packaging. [18][19][20] Apart from beneficial attributes, low thermal stability and high cost are the main disadvantages, which may restrict its utilization for large-scale applications.…”

“…[18][19][20] Apart from beneficial attributes, low thermal stability and high cost are the main disadvantages, which may restrict its utilization for large-scale applications. [18][19][20] These downsides can be generally overcome by different methods including copolymerization, mixing with different biopolymers and by introducing some filler/reinforcement. [21] Andrzejewski et al [22] studied the influence of corkwood waste hybrid filler on the structure and mechanical performance of PLA-based composites.…”

“…[18,19] It shows closely identical mechanical and physical properties compared to synthetic polymers; therefore adopted for various applications including biomedical, textile, and packaging. [18][19][20] Apart from beneficial attributes, low thermal stability and high cost are the main disadvantages, which may restrict its utilization for large-scale applications. [18][19][20] These downsides can be generally overcome by different methods including copolymerization, mixing with different biopolymers and by introducing some filler/reinforcement.…”

Mechanical, dielectric, and hydrophobicity behavior of coconut shell biochar toughened Caryota urens natural fiber reinforced epoxy composite

“…Higher abrasion and adhesion wear loss were caused by the high specific wear rate and coefficient of friction. [29] The sticky molecular composition of epoxy resin adheres to the abrasion disc, removing a significant amount of material from the work piece. This material re-adhered to the abrasion disc, resulting in better three-body and two-body abrasion.…”