Abstract Poor interfacial adhesion and inferior UV resistance severely inhibit the development of hybrid Meta-aramid/Polytetrafluoroethylene (Nomex/PTFE) fabric composites for distinguished solid self-lubrication materials, especially under high exterior load and long-term UV irradiation conditions. Herein, glycidyl polyhedral oligomeric silesquioxanes (POSS) nanoparticles are covalently grafted onto the hybrid Nomex/PTFE fabric with a polydopamine/polyethylenimine (PDA/PEI) intermediate layer. The microstructure and chemical characteristics of Nomex and PTFE fibers before and after modification are investigated and the results manifest an obvious increase in surface functional groups and roughness, as well as resin compatibility. Tensile and peeling testing results show that the obtained fabric composites, denoted as hybrid-fabric@PDA/PEI-POSS composites, exhibit 24.3% and 46.8% enhancements in tensile and interfacial bonding strength without discernable decrease in pristine hybrid-fabric strength. In addition, the PDA/PEI-POSS hierarchical coating imparts the hybrid-fabric with excellent UV-shielding properties. As a result, the tribological performance of hybrid-fabric@PDA/PEI-POSS composites presents an obvious improvement under high load and UV irradiation conditions.

中文翻译：

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具有仿生中间层的 POSS 接枝混合织物复合材料，可同时提高抗紫外线性能和摩擦学性能

摘要 界面附着力差和抗紫外线性能差严重阻碍了混合间位芳纶/聚四氟乙烯（Nomex/PTFE）织物复合材料的发展，用于卓越的固体自润滑材料，尤其是在高外部负载和长期紫外线照射条件下。在此，缩水甘油多面体低聚倍半硅氧烷 (POSS) 纳米颗粒共价接枝到具有聚多巴胺/聚乙烯亚胺 (PDA/PEI) 中间层的混合 Nomex/PTFE 织物上。研究了改性前后Nomex和PTFE纤维的微观结构和化学特性，结果表明表面官能团和粗糙度明显增加，树脂相容性也明显增加。拉伸和剥离测试结果表明，所得织物复合材料，表示为混合织物@PDA/PEI-POSS 复合材料，在拉伸和界面结合强度方面表现出 24.3% 和 46.8% 的增强，而原始混合织物强度没有明显降低。此外，PDA/PEI-POSS 分层涂层赋予混合织物优异的紫外线屏蔽性能。因此，混合织物@PDA/PEI-POSS 复合材料的摩擦学性能在高负载和紫外线照射条件下呈现出明显的改善。