Haque Mohammad Salman, Islam M A
Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh.
Department of Materials Science and Engineering, Khulna University of Engineering & Technology (KUET), Khulna, 9203, Bangladesh.
Heliyon. 2024 Oct 16;10(20):e39397. doi: 10.1016/j.heliyon.2024.e39397. eCollection 2024 Oct 30.
The non-biodegradable nature of polymers presents a considerable environmental hazard, mainly when they accumulate in drainage systems and pollute the water. The application of natural fiber composites has the potential to offer a feasible resolution to address this problem, as natural fibers possess inherent biodegradability. This study examined the degradation ability of epoxy composites made with 5 wt% waste jute fiber and 5 wt% waste sawdust fiber when subjected to drainage water for one year. The composites comprising jute fiber and sawdust demonstrated a reduction in tensile strength by 57 % and 40 %, respectively, because of biodegradation caused by microorganisms. The microorganism consumed the fiber for energy, resulting in significant weight and flexural strength loss. The weathered waste jute and sawdust fiber composite samples displayed an additional peak at a wavenumber of 1700 cm for FTIR analysis, indicating the presence of the C=O group and reflecting CO production. The SEM image reveals the presence of clusters, biofilms, and colonies of microorganisms on the surface of the composites, indicating that the microbes were utilizing the fibers and matrix as a substrate for growth and multiplication. This research contributes to the understanding of the degradation mechanisms of sustainable composites and provides insight into the advancement of eco-friendly materials to reduce water pollution.
聚合物的不可生物降解性对环境构成了相当大的危害，主要是当它们在排水系统中积累并污染水源时。天然纤维复合材料的应用有可能为解决这一问题提供可行的解决方案，因为天然纤维具有固有的生物降解性。本研究考察了由5 wt%废黄麻纤维和5 wt%废木屑纤维制成的环氧复合材料在排水水中放置一年后的降解能力。由于微生物引起的生物降解，包含黄麻纤维和木屑的复合材料的拉伸强度分别降低了57%和40%。微生物消耗纤维获取能量，导致重量和弯曲强度显著损失。经风化的废黄麻和木屑纤维复合材料样品在FTIR分析的1700 cm波数处显示出一个额外的峰，表明存在C=O基团并反映了CO的产生。扫描电子显微镜图像显示复合材料表面存在微生物簇、生物膜和菌落，表明微生物正在利用纤维和基体作为生长和繁殖的底物。本研究有助于理解可持续复合材料的降解机制，并为开发减少水污染的环保材料提供见解。
