在CFRP的碳纤维回收过程中通过热解对氧化行为的研究
Yiyao Ren1, Lei Xu2, Yongfen Sun1
1Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.
Journal of environmental management
|October 1, 2023
概括
使用热解和氧化方法从复合材料中回收碳纤维,有效地恢复它们的机械性能. 这种清洁的回收方法保护了纤维的完整性,并提高了树脂的兼容性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 碳纤维增强聚合物 (CFRP) 是具有出色性能的先进材料.
- 回收CFRP对于可持续性和资源管理至关重要.
- 热解是一种常见的CFRP回收方法,但剩余的碳可以影响纤维质量.
研究的目的:
- 开发一种高效和清洁的方法来回收CFRP的碳纤维.
- 通过氧化来研究热解碳的去除.
- 分析热解氧化碳氧化的机制及其对回收碳纤维特性的影响.
主要方法:
- 碳纤维从CFRP中使用热解回收.
- 氧化被用来去除剩余的热解碳.
- 分析了回收纤维的机械性能 (抗拉强度) 和化学结构.
- 密度函数理论 (DFT) 的计算被用来研究氧化机制.
主要成果:
- 在最佳条件下,再生碳纤维保留了96.2%的原始纤维抗拉强度.
- 回收纤维显示出与原始纤维相似的化学结构和石墨化.
- 经过环氧树脂循环碳纤维的可湿性得到改善.
- DFT的计算证实,热溶性碳比碳纤维更容易氧化,因此可以进行选择性去除.
结论:
- 联合热解和氧化方法有效地回收CFRP的碳纤维.
- 该工艺保持了机械完整性,并增强了回收碳纤维的接口特性.
- 了解氧化机制为清洁和高效的碳纤维回收提供了技术支持.
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