再生碳纤维回收利用及其增材制造复合材料性能评价

doi:10.3901/JME.2023.07.375

机械工程学报 ›› 2023, Vol. 59 ›› Issue (7): 375-388.doi: 10.3901/JME.2023.07.375

• 资源化与再制造技术及装备 • 上一篇下一篇

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再生碳纤维回收利用及其增材制造复合材料性能评价

成焕波^1,2,3, 郭立军¹, 周金虎¹, 王华锋¹, 汤明喜¹

1. 南京工程学院机械工程学院南京 211167;
2. 南京工程学院江苏省复合材料精密加工与再制造工程研究中心南京 211167;
3. 南京工程学院绿色生产与再制造工程研究所南京 211167

收稿日期:2022-05-24 修回日期:2022-12-08 出版日期:2023-04-20 发布日期:2023-06-16
作者简介:成焕波,男,1987年出生,博士,副教授,硕士研究生导师。主要研究方向为可持续设计与制造、绿色制造与再制造、回收与再资源化。E-mail:chenghuanbo@njit.edu.cn
基金资助:
国家自然科学基金(51705237)、江苏省重点研发计划(BE2021709)、江苏省重点实验室开放基金(RRME201806)和江苏省研究生科研与实践创新计划(SJCX210926)

Recycling of Carbon Fiber and Performance Evaluation for Its Reinforced Composites Made of Additive Manufacturing

CHENG Huanbo^1,2,3, GUO Lijun¹, ZHOU Jinhu¹, WANG Huafeng¹, TANG Mingxi¹

1. School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167;
2. Jiangsu Province Composite Materials Precision Machining and Remanufacturing EngineeringResearch Center, Nanjing Institute of Technology, Nanjing 211167;
3. Institute of Green Production and Remanufacturing Engineering, Nanjing Institute of Technology, Nanjing 211167

Received:2022-05-24 Revised:2022-12-08 Online:2023-04-20 Published:2023-06-16

摘要/Abstract

摘要： 为实现碳纤维增强树脂基复合材料废弃物高效、高质、环境友好型回收与再生碳纤维高值再利用，提出了热活化氧化物半导体回收碳纤维与再生碳纤维增强复合材料(rCFRP)增材再制造的工艺方法。通过电磁顺磁共振与红外光谱测试分析了回收原理，基于单因素实验研究了树脂基体分解率的影响因素以及显著因素对再生碳纤维结构、性能的作用规律，探究了再生碳纤维增强聚乳酸复合材料(rCF/PLA)的力学性能及其产品应用。结果表明，回收过程无液相产物，气相产物主要为CO₂、H₂O；树脂基体分解率与温度、时间呈正相关，O₂浓度及流量作用不显著，树脂基体分解率可达97.1%且再生碳纤维表面无积碳产生。再生碳纤维表面氧化与石墨结构刻蚀程度随温度升高而增加，在一定温度下，合理的处理时间可减小其表面氧化与石墨结构刻蚀程度。再生碳纤维的单丝拉伸性能与温度、时间呈正相关，其单丝拉伸性能可保持原碳纤维的99%以上。与聚乳酸相比，rCF/PLA的抗拉强度提高了7.47%，抗弯强度与模量分别提高了12.29%与52.4%；与原碳纤维增强聚乳酸复合材料相比，rCF/PLA的抗拉强度保持了95.1%，抗弯强度与模量分别保持了96.23%与103.25%。rCFRP增材再制造产品在体育、医疗、汽车等领域具有良好的应用。

关键词: 碳纤维增强树脂基复合材料, 回收, 热活化氧化物半导体, 再制造, 增材制造

Abstract: In order to realize the high-efficiency, high-quality and environment-friendly recycling of carbon fiber reinforced polymer waste and the high-value reuse of recycled carbon fiber, carbon fiber recycling by thermally activated of oxide semiconductors method and the additive remanufacturing process of recycled carbon fiber reinforced polymer(rCFRP) are proposed. The principle of recycling is analyzed by electron paramagnetic resonance and infrared spectroscopy. Based on complete randomized design, the factors affecting the decomposition rate of resin matrix and the effect of significant factors on the structure and mechanical properties of recycled carbon fiber are investigated. The mechanical properties of recycled carbon fiber reinforced polylactic acid composites (rCF/PLA) and their product applications are explored. The results show that there is no liquid phase product in the recycling process and the gas phase products are mainly CO₂ and H₂O.The resin matrix decomposition rate is positively correlated with temperature and time, and the O₂ concentration and that flow rate have no significant effect on the decomposition rate of resin matrix. The resin matrix decomposition rate can reach 97.1%, and no carbon deposits are produced on the surface of recycled carbon fiber. The increase of temperature will aggravate the degree of oxidation and graphite structure etching for recycled carbon fiber surface, while under certain temperature conditions, reasonable treatment time can reduce that. The monofilament tensile properties of recycled carbon fiber are positively correlated with temperature and time, and the monofilament tensile properties of recycled carbon fiber can maintain more than 99% of the original carbon fiber. Compared with polylactic acid, the tensile strength, flexural strength and modulus of rCF/PLA are respectively increased by 7.47%, 12.29% and 52.4%. Compared with the original carbon fiber reinforced polylactic acid composites, the tensile strength, flexural strength and modulus of rCF/PLA are respectively remained 95.1%, 96.23% and 103.25%. The products of additive remanufactured of rCFRP have good applications in sports, medical, automotive and other fields.

Key words: carbon fiber reinforced polymer, recycling, thermally activated of oxide semiconductors, remanufacturing, additive manufacturing

中图分类号:

TB332
X705

成焕波, 郭立军, 周金虎, 王华锋, 汤明喜. 再生碳纤维回收利用及其增材制造复合材料性能评价[J]. 机械工程学报, 2023, 59(7): 375-388.

CHENG Huanbo, GUO Lijun, ZHOU Jinhu, WANG Huafeng, TANG Mingxi. Recycling of Carbon Fiber and Performance Evaluation for Its Reinforced Composites Made of Additive Manufacturing[J]. Journal of Mechanical Engineering, 2023, 59(7): 375-388.

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再生碳纤维回收利用及其增材制造复合材料性能评价

Recycling of Carbon Fiber and Performance Evaluation for Its Reinforced Composites Made of Additive Manufacturing

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