Performance of Bacteria <i>Lysinibacillus</i> and <i>Enterococcus Faecalis</i> to Degrade PA6 Composites

Abstract

The current research focuses on applying bio-reinforced composite materials, specifically emphasizing polyamide 6 (PA6), a widely used thermoplastic polymer known for its mechanical strength and versatility. To enhance the environmental sustainability of PA6, various natural reinforcements, including olive pomace powder (OPP), peanut shell powder (PSP), and plaster (PL), have been incorporated. This comprehensive study investigates the biodegradation of PA6 composites reinforced with these materials in the presence of specific bacteria such as Lysinibacillus sp. and Enterococcus faecalis. These bacteria were chosen for their known ability to degrade synthetic polymers. A range of analytical methods were employed to assess the biodegradation process thoroughly. Mass loss measurements provided quantitative data on the extent of polymer degradation. Scanning electron microscopy (SEM) was used to observe the surface morphology and structural changes in the composites, while infrared spectroscopy (IR) offered insights into the chemical modifications occurring during biodegradation. The results of this study reveal significant insights into the biodegradability of PA6 when reinforced with OPP, PSP, and PL. Notably, adding these bio-reinforcements enhanced the degradation rate of PA6, demonstrating their potential as effective agents for reducing the environmental impact of plastic waste. These findings are crucial in addressing the pressing challenges of ecological pollution caused by polymer waste, emphasizing the importance of developing sustainable materials. By providing a deeper understanding of the biodegradation mechanisms of PA6 composites, this research contributes to the advancement of environmentally friendly approaches in the design and utilization of plastic materials, paving the way for innovative solutions in waste management and pollution reduction.