Abstract Encouraged by results of theoretical simulations, we used non-covalently functionalized reduced graphene oxide (NFRGO) nanoplatelets as a substance to grow in situ SiO2 nanoparticles. A series of hierarchical-structured NFRGO-SiO2 nanocomposites were prepared and applied to reinforce hydrogenated nitrile butadiene rubber (HNBR). Ultra-small SiO2 nanoparticles were obtained and highly dispersed on the NFRGO due to the non-covalent functionalization of cetyltrimethylammonium bromide (CTAB). A small amount (1 wt%) of NFRGO incorporated into the SiO2 improves both the static and the dynamic mechanical properties as well as the viscoelastic behavior of NFRGO-SiO2/HNBR composites due to the weak hybrid filler network and the strong filler-rubber interfacial interaction. Significantly, the reinforcement index (RI) of 1%-NFRGO-SiO2/HNBR is 150.7% and 53.9% higher than those of SiO2/HNBR and the HNBR composites filled by a mixture of 1 wt% of RGO and SiO2 (1%-RGO-SiO2/HNBR), respectively. Our work highlights the rational design of hierarchical nanocomposites for reinforcing high-performing HNBR composites.

中文翻译：

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高度分散在非共价官能化还原氧化石墨烯纳米片上的超小 SiO2 纳米颗粒，用于高性能弹性体应用

摘要 受理论模拟结果的鼓舞，我们使用非共价功能化的还原氧化石墨烯 (NFRGO) 纳米片作为原位生长 SiO2 纳米颗粒的物质。制备了一系列分层结构的 NFRGO-SiO2 纳米复合材料并应用于增强氢化丁腈橡胶 (HNBR)。由于十六烷基三甲基溴化铵 (CTAB) 的非共价官能化，获得了超小 SiO2 纳米粒子并高度分散在 NFRGO 上。由于弱混合填料网络和强填料-橡胶界面，少量 (1 wt%) NFRGO 掺入 SiO2 可改善 NFRGO-SiO2/HNBR 复合材料的静态和动态机械性能以及粘弹性行为相互作用。值得注意的是，1%-NFRGO-SiO2/HNBR 的增强指数 (RI) 为 150。分别比 SiO2/HNBR 和填充有 1 wt% RGO 和 SiO2 混合物（1%-RGO-SiO2/HNBR）的 HNBR 复合材料高 7% 和 53.9%。我们的工作突出了用于增强高性能 HNBR 复合材料的分层纳米复合材料的合理设计。