提高3D打印CF/TPU复合材料的能量吸收性能,通过多层次的协同作用引入"刚性-弹性"结构
Xuanyu Zhou1, He Ouyang2, Yuan Zhang2
1Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China.
Polymers
|July 12, 2025
概括
新型碳纤维增强热塑性聚氨 (CF/TPU) 复合材料被开发用于3D打印. 这些增强的CF/TPU材料实现了刚性和弹性的平衡,大大提高了结构应用的强度和能量吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物工程 聚合物工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 热塑性聚氨 (TPU) 提供了弹性和热塑性质的组合.
- 然而,TPU缺乏足够的刚性和强度,以适应苛刻的结构应用.
- 开发能够平衡弹性与增强机械性能的混合材料至关重要.
研究的目的:
- 开发用于3D打印的新型碳纤维增强TPU (CF/TPU) 复合纤维.
- 通过加入碳纤维来实现TPU的刚性-弹性平衡.
- 优化材料组成和3D打印参数,以提高机械性能和能量吸收.
主要方法:
- 制造具有不同碳纤维 (CF) 含量 (0-25%) 的CF/TPU复合纤维.
- 利用融挤出和3D打印过程.
- 系统评估CF含量和打印参数 (温度,速度) 以确定最佳性能.
主要成果:
- 在220-230°C和40mm/s的最佳印刷条件下,以防止聚合物降解并确保纤维湿.
- 20%的CF/TPU表现出显著的改善:拉伸强度为63.65%,压力强度为105.51%,冲击强度为93.69%.
- 在能量吸收方面有显著的改进:压缩时70.88%,冲击时72.92%.
结论:
- 开发的CF/TPU复合材料为创建刚性弹性混合材料提供了可行的解决方案.
- 合理的材料设计和优化的增材制造使量身定制的能量吸收能力成为可能.
- 该框架支持用于结构应用的先进材料的开发,这些材料需要灵活性和强度.
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