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实现大尺寸增材制造模具和刀具的工业再利用
Matthew Korey1,2, Amber M Hubbard1, Gregory Haye3
1Oak Ridge National Laboratory, Manufacturing Science Division, 1 Bethel Valley Rd., Oak Ridge, TN 37830, USA.
Polymers
|November 27, 2025
概括
机械回收碳纤维 (CF) 填充的聚碳酸 (PC) 用于大尺寸增材制造 (LFAM) 是有前途的. 回收CF-PC保留了关键性质,降低了工业应用的成本和环境影响.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 可持续制造 可持续制造 可持续制造
背景情况:
- 大尺寸增材制造 (LFAM) 使用碳纤维 (CF) 填充的聚碳酸 (PC) 等先进的复合材料作为金属的经济有效替代品.
- 研究了CF-PC组件寿命终端 (EOL) 的机械回收,以减少原料成本和环境影响.
- 之前的研究表明,在实验室和试点尺度上回收CF-PC的性能影响最小.
研究的目的:
- 评估通过工业规模LFAM加工的机械循环CF-PC的性能和可打印性.
- 评估将回收CF-PC整合到工业增材制造应用中的可行性.
- 确定技术创新的领域,以提高回收材料的性能.
主要方法:
- EOL CF-PC组件经历了工业破碎和化复合.
- 回收材料使用LFAM设备进行处理.
- 分析了材料特性,包括纤维长度,分子量 (GPC),密度 (pycnometry),热性能 (DMA) 和拉伸性能 (X和Z方向).
主要成果:
- 回收CF-PC显示平均纤维长度减少了24.6%.
- 拉力强度在X方向下降了21%,而拉力模量下降了39%.
- Z方向拉伸模量增加了4%,密度增加了6.8%,热偏移温度 (HDT) 保持了97%以上的原始值.
结论:
- 机械回收的CF-PC可以集成到工业LFAM应用中,从而降低成本和环境效益.
- 尽管有些性能降解 (例如纤维长度,抗拉强度),但像模块和HTT这样的关键性能指标在很大程度上保持不变.
- 需要技术进步来缓解纤维退化,并进一步提高回收CF-PC的性能,以便在循环制造实践中更广泛地采用.
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