Zuo Pei, Liu Tongfeng, Li Fang, Wang Guoyan, Zhang Kaihu, Li Xin, Han Weina, Tian Hong, Hu Lifei, Huang Helang, Zhu Di, Jiang Lan
School of Mechanical and Electrical Engineering, Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety, School of Optical Information and Energy Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Beijing Institute of Space Mechanics & Electricity, China Academy of Space Technology, Beijing 100094, China.
ACS Omega. 2024 May 3;9(19):20988-20996. doi: 10.1021/acsomega.4c00148. eCollection 2024 May 14.
Carbon fiber reinforced polymer (CFRP), a highly engineered lightweight material with superior properties, is widely used in industrial fields, such as aerospace, automobile, and railway transportation, as well as medical implants and supercapacitor. This work presents an effective surface treatment method for the controllable fabrication of hydrophilic surface micro/nanostructures of CFRP through femtosecond laser processing. Selective removal of the epoxy resin and leaving the carbon fibers exposed are achieved when CFRP is weakly ablated by a femtosecond laser. The diameters and structures of the carbon fibers can be controlled by adjusting the laser processing parameters. Three-dimensional surface micro/nanostructures are processed when CFRP is strongly ablated by a femtosecond laser. Meanwhile, the transformation of the orbitals to orbitals of graphitic carbons of carbon fibers is induced by a femtosecond laser. Moreover, the investigation of surface roughness and wettability of femtosecond laser-processed CFRP indicates increased roughness and excellent hydrophilicity (a contact angle of 28.1°). This work reveals the effect of femtosecond laser processing on the regulation of the physicochemical properties of CFRP, which can be applicable to surface treatment and performance control of other fiber-resin composites. The excellent hydrophilicity will be conducive to the combination of CFRP with other materials or to reducing the friction resistance of CFRP used in medical implants.
碳纤维增强聚合物（CFRP）是一种经过高度工程化的轻质材料，具有卓越性能，广泛应用于航空航天、汽车和铁路运输等工业领域，以及医疗植入物和超级电容器。本文提出了一种有效的表面处理方法，通过飞秒激光加工可控地制备CFRP亲水性表面微/纳米结构。当用飞秒激光对CFRP进行弱烧蚀时，可实现环氧树脂的选择性去除并使碳纤维暴露出来。通过调整激光加工参数，可以控制碳纤维的直径和结构。当用飞秒激光对CFRP进行强烧蚀时，可加工出三维表面微/纳米结构。同时，飞秒激光可诱导碳纤维的石墨化碳的轨道向 轨道转变。此外，对飞秒激光加工后的CFRP表面粗糙度和润湿性的研究表明，粗糙度增加且具有优异的亲水性（接触角为28.1°）。这项工作揭示了飞秒激光加工对CFRP物理化学性能调控的影响，可应用于其他纤维 - 树脂复合材料的表面处理和性能控制。优异的亲水性将有利于CFRP与其他材料的结合，或降低其在医疗植入物中使用时的摩擦阻力。
