This paper presents an effective technology that could simultaneously enhance the interfacial shear strength (IFSS) and monitor the interfacial stress state between glass fiber and epoxy vinyl ester resin (GF/epoxy). Muiti-walled carbon nanotube (MWCNT) was added to aqueous surfactant solution and dispersed by ultrasonic. Subsequently, MWCNT was deposited on GF surface by physical vapor deposition. The results show that the sensing performance of the developed sensor was dependence on MWCNT solution concentration, interface length, ultrasonic dispersion duration, and immersion cycles. Fiber-bundle pull-out tests show that IFSS of GF/epoxy was enhanced by incorporating MWCNT into the interphase. By measuring resistance change of the MWCNT sensor, the interfacial evolution behaviour was monitored during the pull-out test. The results indicate that the presented technology can be successfully used for in-situ sensing the accumulated interfacial damage and simultaneously enhancing the IFSS of GF/epoxy composites.

本文提出了一种有效的技术，可以同时提高界面剪切强度（IFSS）并监视玻璃纤维与环氧乙烯基酯树脂（GF /环氧树脂）之间的界面应力状态。将多壁碳纳米管（MWCNT）添加到表面活性剂水溶液中并通过超声分散。随后，通过物理气相沉积将MWCNT沉积在GF表面上。结果表明，开发的传感器的传感性能取决于MWCNT溶液浓度，界面长度，超声分散持续时间和浸没循环。纤维束拉出试验表明，通过将MWCNT掺入相间，可以增强GF /环氧树脂的IFSS。通过测量MWCNT传感器的电阻变化，可以在拉拔测试过程中监控界面演变行为。