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连续纤维复合材料的3D打印使用双阶段紫外线可固化树脂
Huan Jiang1, Arif M Abdullah1, Yuchen Ding1
1Department of Mechanical Engineering, University of Colorado Denver, Denver, CO 80217, USA. martin.dunn@ucdenver.edu.
Materials horizons
|October 4, 2023
概括
这项研究引入了一种新的两级紫外线可固化树脂,用于3D打印连续碳纤维复合材料. 新的树脂增强了机械性能,并使其可修复,解决了复合材料制造的关键挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 添加剂制造 添加剂制造 添加剂制造
- 聚合物化学 聚合物化学
背景情况:
- 3D打印为连续纤维复合材料提供了设计自由,但UV可固化树脂的机械强度低,可修复性差.
- 现有的耐热复合材料缺乏再加工能力,阻碍了快速的原型设计和产品开发.
- 高性能应用需要改进3D打印复合材料的机械性能和接口粘合.
研究的目的:
- 为了研究两级紫外线可固化树脂的潜力,用于3D打印连续碳纤维复合材料.
- 解决当前紫外线可固化的树脂的局限性,包括机械强度低和无法再加工.
- 为了提高3D打印热复合材料的机械性能,耐用性和可修复性.
主要方法:
- 采用了由烯酸单体和具有可交换共价键的交叉连接剂组成的两级紫外线可固化树脂.
- 开发了高达30.9%连续碳纤维的复合纤维,用于3D打印.
- 应用紫外线照射以快速沉积和固化,然后进行后加热以诱导键交换反应.
主要成果:
- 在印刷复合材料中的机械刚性,强度和线程间粘合方面取得了显著的改进.
- 证明了3D打印热固复合材料的修复,重塑和回收的能力.
- 通过使用新型树脂系统,成功打印了高纤维含量 (高达30.9%) 的复合材料.
结论:
- 双阶段紫外线可固化树脂对于克服3D打印连续纤维复合材料的局限性非常有希望.
- 开发的材料系统显著改善了机械性能,并通过维修和回收利用实现了可持续的复合材料制造.
- 这项研究为将两级可固化树脂技术扩展到先进的复合材料应用提供了基础的理解.
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