Department of Mechanical Engineering, National Institute of Technology, Agartala, Tripura, India.
Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Malaysia.
Environ Sci Pollut Res Int. 2023 Dec;30(60):124566-124584. doi: 10.1007/s11356-022-20915-6. Epub 2022 May 23.
The usage of waste for the development of sustainable building materials has received an increasing attention in socio-eco-environment spheres. The rice husk ash (RHA) produced during burning of rice husk and the ever-increasing plastic wastes are useless causing detrimental effects on the environment. This research supports the idea of sustainability and circular economy via utilization of waste to produce value-added products. This research explores the potential of waste plastics, RHA, and silica sand as thermoplastic composite materials. The different composite samples were prepared through waste plastics which includes low- and high-density polyethylene and polypropylene with incorporation of RHA and silica sand in proportions. The study investigates the effect of filler/polymer in 30/70, 20/80, and 10/90 (wt. %) on the workability of the developed composite materials. The workability of the composites was found to improve with filler reinforcement. The experimental results showed the maximum density of 1.676 g/cm and mechanical strength of 26.39, 4.89, and 3.25 MPa as compressive, flexural, and tensile strengths, respectively. The minimum percentage of water absorption was 0.052%. The wear tests resulted in a minimum abrasive and sliding wear rate of 0.03759 (cm) and 0.00692 × 10 kg/m. The correlations between wear mechanisms and responses were morphologically analyzed. The developed composites verify the feasibility of RHA and plastics waste as a cost effective and environmentally competent product. The results and discussions provided a direction for the future research on sustainable polymeric composite materials.
在社会-生态-环境领域，利用废物开发可持续建筑材料的做法受到了越来越多的关注。稻壳在燃烧过程中产生的稻壳灰（RHA）和日益增多的塑料废物是无用的，对环境造成了有害影响。本研究通过利用废物来生产增值产品，支持可持续性和循环经济的理念。本研究探索了废塑料、稻壳灰和硅砂作为热塑性复合材料的潜力。通过添加稻壳灰和硅砂，不同的复合样品由废塑料制备而成，其比例为 30/70、20/80 和 10/90（wt.%）。研究考察了填料/聚合物在 30/70、20/80 和 10/90（wt.%）比例下对所开发复合材料的可加工性的影响。结果表明，复合材料的可加工性随着填料的增强而提高。实验结果表明，复合材料的最大密度为 1.676 g/cm，压缩强度、弯曲强度和拉伸强度分别为 26.39、4.89 和 3.25 MPa。吸水率最低为 0.052%。磨损试验得出的最小磨料和滑动磨损率分别为 0.03759（cm）和 0.00692 × 10 kg/m。对磨损机制和响应之间的相关性进行了形态学分析。研究结果表明，稻壳灰和塑料废物作为一种具有成本效益和环境竞争力的产品是可行的。研究结果和讨论为可持续聚合物基复合材料的未来研究提供了方向。
