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Interfacial Modification and Tribological Properties of Carbon Fiber Grafted by TiO2 Nanorods Reinforced Novel Depolymerized Thermosetting Composites
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2020-03-03 , DOI: 10.1016/j.compositesa.2020.105860
Zhe Lin , Xiaohua Jia , Jin Yang , Yong Li , Haojie Song

In this study, homogeneous and dense TiO2 nanorods (TiO2 NRs) were grafted onto carbon fiber (CF) simply by hydrothermal method to enhance the interfacial bonding between CF and poly(hexahydrotriazine)s (PHTs) matrix and improve the tribological properties of CF reinforced polymer composites (CFRPs). The oriented TiO2 NRs impacted the mechanical properties by supplying mechanical interlock. As growth of TiO2 NRs increased, the tensile strength and modulus enhanced by about 31.8% and 15.1% when compared to neat CF. Most importantly, the wear rate of PHT/TiO2@CFC reduced by 55.1% when compared to PHT/CFC, leading to stable friction profile. The wet friction test in seawater and sunflower oil also demonstrated satisfied wear resistance of PHT/TiO2@CFC, where wear rate decreased by 46.6%. On the other hand, mild degradation solution might effectively recycle CF from PHT/TiO2@CFC composite without damage to properties. In sum, the proposed alternative method for multiscale modification of CF surfaces looks promising for manufacturing of advanced recyclable CFRPs for tribological applications.



中文翻译:

TiO 2纳米棒增强新型解聚热固性复合材料接枝碳纤维的界面改性和摩擦学性能

在这项研究中,通过水热法将均匀且致密的TiO 2纳米棒(TiO 2 NRs)接枝到碳纤维(CF)上,以增强CF与聚(六氢三嗪)(PHTs)基质之间的界面键合并改善其摩擦学性能。 CF增强聚合物复合材料(CFRP)。取向的TiO 2 NRs通过提供机械联锁而影响了机械性能。随着TiO 2 NRs的增长,与纯CF相比,拉伸强度和模量提高了约31.8%和15.1%。最重要的是,PHT / TiO 2的磨损率与PHT / CFC相比,@ CFC降低了55.1%,从而实现了稳定的摩擦特性。在海水和葵花籽油中的湿摩擦试验也表明,PHT / TiO 2 @CFC具有令人满意的耐磨性,磨损率降低了46.6%。另一方面,温和的降解溶液可以有效地从PHT / TiO 2 @CFC复合材料中回收CF,而不会损害性能。总而言之,提出的用于CF表面的多尺度修饰的替代方法对于制造用于摩擦学应用的高级可回收CFRP很有希望。

更新日期:2020-03-04
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