Hu Wenlong, Sun Zijie, Yang Lulu, Hu Chaojie, Zhang Shuzheng, Wang Fangxin, Yang Bin, Cang Yu
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China.
Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094, China.
Nanomaterials (Basel). 2022 Oct 22;12(21):3717. doi: 10.3390/nano12213717.
Carbon fiber-reinforced polymers are important constituents of aerospace materials. However, due to the inert surface of CFs, their interfacial property is relatively weak, which severely hinders their practical applications. Here, we deposited multi-walled carbon nanotubes (MWCNTs) along with a coupling agent on the surface of carbon fiber to improve the interfacial properties of the carbon fiber/resin. Via a simple dip-coating method, the MWCNTs were uniformly distributed on the CF surface with the assistance of the pre-coated coupling agent. The interfacial shear strength between the fiber and the matrix was significant enhanceed when the CF was loaded with the coupling agent and the MWCNTs. In addition, the MWCNTs were used as sensors to in-situ monitor the interfacial state in order to elucidate the interfacial strengthening mechanism. It revealed that the collaborative contribution of the coupling agent and the MWCNTs in the interphase region is the key to the high interfacial strength.
碳纤维增强聚合物是航空航天材料的重要组成部分。然而，由于碳纤维表面惰性，其界面性能相对较弱，这严重阻碍了它们的实际应用。在此，我们在碳纤维表面沉积了多壁碳纳米管（MWCNTs）以及一种偶联剂，以改善碳纤维/树脂的界面性能。通过一种简单的浸涂方法，多壁碳纳米管在预涂偶联剂的辅助下均匀分布在碳纤维表面。当碳纤维负载偶联剂和多壁碳纳米管时，纤维与基体之间的界面剪切强度显著提高。此外，多壁碳纳米管被用作传感器来原位监测界面状态，以阐明界面强化机制。结果表明，偶联剂和多壁碳纳米管在界面区域的协同作用是获得高界面强度的关键。
