Kuzmin Anton, Ashori Alireza, Pantyukhov Petr, Zhou Yonghui, Guan Litao, Hu Chuanshuang
Department of Mechanization of Agricultural Products Processing, National Research Mordovian State University, Saransk, 430005, Russia.
Scientific Laboratory of Advanced Composite Materials and Technologies, Plekhanov Russian University of Economics, Moscow, 117997, Russia.
Sci Rep. 2024 Oct 24;14(1):25232. doi: 10.1038/s41598-024-76337-6.
This study investigates the mechanical, thermal, and water absorption properties of high-density polyethylene (HDPE) composites filled with barley straw and varying amounts of waste rubber. The research aims to develop sustainable materials that repurpose agricultural and industrial waste while addressing resource scarcity and waste management challenges. Composites were prepared using a twin-rotor mixer and hydraulic press, with waste rubber content varying from 0 to 20 wt%. Mechanical properties were evaluated through tensile testing, thermal behavior was analyzed using TGA, DTG, and DSC, and long-term water absorption was measured. Results show that increasing waste rubber content from 0 to 20% led to a decrease in tensile strength (11.3 to 8.9 MPa) and tensile modulus (1760 to 790 MPa), while relative extension increased (2.4-5.9%). Thermal analysis revealed a slight reduction in onset degradation temperature (270 °C to 240 °C) and increased char residue (8-18%) with higher rubber content. Water absorption decreased significantly, from 12 to 13% to 6-7% after 600 h of immersion, as waste rubber content increased. These findings demonstrate that incorporating waste rubber into HDPE/barley straw composites results in materials with enhanced flexibility and water resistance at the cost of some strength and stiffness. In conclusion, the results of this study offer a clear pathway for the development of sustainable polymer composites that have broad potential applications across industries like construction, marine infrastructure, automotive, and packaging. By replacing traditional, resource-intensive materials with eco-friendly alternatives, these composites not only provide functional benefits but also support global efforts toward sustainable development and environmental conservation.
本研究调查了填充大麦秸秆和不同含量废橡胶的高密度聚乙烯（HDPE）复合材料的力学、热学和吸水性性能。该研究旨在开发可持续材料，将农业和工业废弃物重新利用，同时应对资源稀缺和废物管理挑战。使用双转子混合器和液压机制备复合材料，废橡胶含量从0到20 wt%不等。通过拉伸试验评估力学性能，使用热重分析（TGA）、微商热重分析（DTG）和差示扫描量热法（DSC）分析热行为，并测量长期吸水性。结果表明，废橡胶含量从0%增加到20%导致拉伸强度（从11.3 MPa降至8.9 MPa）和拉伸模量（从1760 MPa降至790 MPa）降低，而相对伸长率增加（从2.4%增至5.9%）。热分析显示，起始降解温度略有降低（从270℃降至240℃），且橡胶含量较高时残炭增加（从8%增至18%）。随着废橡胶含量增加，吸水性显著降低，浸泡600小时后从12%至13%降至6%至7%。这些发现表明，将废橡胶掺入HDPE/大麦秸秆复合材料中会使材料的柔韧性和耐水性增强，但会牺牲一些强度和刚度。总之，本研究结果为开发可持续聚合物复合材料提供了一条清晰的途径，这类复合材料在建筑、海洋基础设施、汽车和包装等行业具有广泛的潜在应用。通过用环保替代品取代传统的资源密集型材料，这些复合材料不仅具有功能优势，还支持全球可持续发展和环境保护的努力。
