Li Wei, Feng Tao, Lu Tongyuan, Zhao Feng, Zhao Jialong, Guo Wei, Hua Lin
Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China.
Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China.
Polymers (Basel). 2024 Dec 6;16(23):3435. doi: 10.3390/polym16233435.
Driven by global carbon neutrality goals, bamboo fiber-reinforced PP composites have shown significant potential for automotive applications due to their renewability, low carbon emissions, and superior mechanical properties. However, the environmental complexities associated with compression molding process parameters, which impact material properties and carbon emissions, pose challenges for large-scale adoption. This study systematically optimized the compression molding process of bamboo fiber-reinforced PP composites through a three-factor, five-level experimental design, focusing on preheating temperature, preheating time, and holding time. Additionally, an innovative life cycle assessment (LCA) was conducted to evaluate the environmental impact. The results indicated that at a preheating temperature of 220 °C, preheating time of 210-240 s, and holding time of 40-50 s, the material achieved a tensile strength of 35 MPa and a flexural strength of 45 MPa, with a 15% reduction in water absorption. The LCA further highlighted energy consumption, the compression molding process, and material composition as the primary contributors to carbon emissions and environmental impacts, identifying key areas for future optimization. This study provides an optimized framework for compression molding bamboo fiber-reinforced PP composites and establishes a theoretical foundation for their low-carbon application in the automotive industry. Future work will explore the optimization of bamboo fiber content and process parameters to further enhance material performance and reduce environmental impact.
在全球碳中和目标的推动下，竹纤维增强聚丙烯复合材料因其可再生性、低碳排放和优异的机械性能，在汽车应用中显示出巨大潜力。然而，与压缩成型工艺参数相关的环境复杂性会影响材料性能和碳排放，这对大规模应用构成了挑战。本研究通过三因素、五水平实验设计，系统地优化了竹纤维增强聚丙烯复合材料的压缩成型工艺，重点关注预热温度、预热时间和保压时间。此外，还进行了创新的生命周期评估（LCA）以评估环境影响。结果表明，在预热温度为220℃、预热时间为210 - 240秒、保压时间为40 - 50秒时，该材料的拉伸强度达到35MPa，弯曲强度达到45MPa，吸水率降低了15%。生命周期评估进一步强调了能源消耗、压缩成型工艺和材料成分是碳排放和环境影响的主要贡献因素，确定了未来优化的关键领域。本研究为竹纤维增强聚丙烯复合材料的压缩成型提供了优化框架，并为其在汽车行业的低碳应用奠定了理论基础。未来的工作将探索竹纤维含量和工艺参数的优化，以进一步提高材料性能并减少环境影响。
