Abstract Electrophoretic deposition (EPD) has been used to deposit carbon nanotubes (CNTs) onto glass fibers to strengthen the fiber/matrix interphase of glass/epoxy composites. CNTs were functionalized using an ultrasonicated-ozonolysis followed by polyethyleneimine (PEI) treatment, creating a stable, aqueous dispersion suitable for EPD. Single E-glass fiber filaments were successfully coated with the functionalized CNTs using EPD. Single fiber tensile and microdroplet debond tests were conducted to investigate the tensile properties of the CNT modified E-glass fibers and their interfacial structure and properties in an epoxy matrix, respectively. Weibull analysis of the fiber testing revealed no detrimental effects resulted from the CNT coating, with some evidence to suggest slightly improved strength. Microdroplet tests revealed changes in the fracture modes due to the application of the CNT coating. The interfacial shear-sliding shifted from the fiber/resin interface to the CNT/resin interphase for the CNT modified fibers. Higher effective interfacial shear strength corresponded to the results where fracture propagated deeper into the CNT-rich interphase layer, confirming the trends observed in previous model interphase studies.

中文翻译：

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通过碳纳米管的电泳沉积定制玻璃纤维界面：纤维和界面表征

摘要 电泳沉积 (EPD) 已被用于将碳纳米管 (CNT) 沉积到玻璃纤维上，以增强玻璃/环氧树脂复合材料的纤维/基质界面。使用超声波臭氧分解和聚乙烯亚胺 (PEI) 处理对 CNT 进行功能化，形成适用于 EPD 的稳定水分散体。使用 EPD 成功地用功能化的碳纳米管涂覆单根无碱玻璃纤维长丝。进行了单纤维拉伸和微滴脱粘试验，分别研究了 CNT 改性 E-玻璃纤维的拉伸性能及其在环氧树脂基体中的界面结构和性能。纤维测试的威布尔分析表明，CNT 涂层没有造成不利影响，一些证据表明强度略有提高。微滴测试揭示了由于 CNT 涂层的应用，断裂模式发生了变化。对于碳纳米管改性纤维，界面剪切滑动从纤维/树脂界面转移到碳纳米管/树脂界面。更高的有效界面剪切强度对应于断裂扩展到富含 CNT 的界面层更深的结果，证实了之前模型界面研究中观察到的趋势。