通过压缩成型回收连续玻璃纤维增强聚胺6层复合材料
Aditya Prakash Shembekar1, Jason Yu2, Mingfu Zhang2
1School of Engineering, Institute for Materials and Processes, The University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, UK.
Polymers
|August 14, 2025
概括
压缩成型有效回收连续玻璃纤维增强聚胺6 (cGF/PA6) 复合材料. 这种方法可以保持纤维长度,增强矩阵结晶性,并保持或改善机械性能,以实现可持续的材料再利用.
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
- 可持续的制造业 可持续的制造业
背景情况:
- 废弃的连续玻璃纤维增强聚胺6 (cGF/PA6) 复合材料在常规回收过程中 (碎碎,磨削,注塑) 经常因纤维长度减少而降解.
- 这导致回收材料的机械性能下降,限制了它们的应用.
研究的目的:
- 通过压缩成型来研究cGF/PA6层材的热力学再加工.
- 评估压缩成型对纤维长度保存,矩阵晶度,热力学性能和性能的影响.
- 为了比较在低于和高于PA6点的温度下再加工的有效性,考虑不同的尺寸剂.
主要方法:
- 两种类型的cGF/APA6层材 (含有反应性 (RS) 和非反应性 (nRS) 尺寸剂) 通过压缩成型在180°C和230°C重新加工.
- 分析包括矩阵结晶性,热力学特性 (Tg),微观结构和性能测试.
- 微结构分析的重点是纤维矩阵粘附后再加工.
主要成果:
- 在180°C和230°C的再加工改善了矩阵晶度,并保留了理想的α-晶相,提高了玻璃过渡温度 (Tg).
- 对于两种类型的板材来说,柔性性能在180°C下保持不变.
- 在230°C进行再加工,RS层材的屈曲强度提高了20%左右,通过显微镜观察到保留的纤维-矩阵粘合力.
结论:
- 压缩成型是cGF/APA6层材的可行回收方法,可保存纤维长度并增强材料性能.
- 重加工温度显著影响机械结果,较高的温度可能会提高性能,特别是对于具有反应性尺寸剂的层状材料.
- 这种方法为传统回收提供了一个可持续的替代方案,在回收复合材料中保持高性能.
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