In an in-situ surface modification method, nano-silica (NS) underwent treatment with bis[3-(triethoxysilyl)propyl]tetrasulfide, often referred to as TESPT, a commercially available SCA (silane coupling agent). This produced surface-functionalized NS, also known as modified nanosilica (mNS). The influence of using this mNS as a filler in styrene-butadiene rubber/acrylonitrile-butadiene rubber (SBR/NBR) composites was examined in this study. The results show that the silanol groups in TESPT form chemical connections with the surface of the NS, which significantly increases the rubber-matrix nanocomposite's curing efficiency and improves its mechanical properties. The reason for this enhancement is the in-situ surface modification of the NS by the SCA, which significantly raises the filler's miscibility and compatibility with the rubber matrix. The SBR/NBR nanocomposites filled with NS and mNS exhibited notable enhancements in tensile and tear strength, demonstrating improvements of 161% and 70%, respectively, in comparison to SBR/NBR vulcanizates.

在原位表面改性方法中，纳米二氧化硅（NS）经过双[3-（三乙氧基甲硅烷基）丙基]四硫化物（通常称为TESPT，一种市售的SCA（硅烷偶联剂））处理。这产生了表面功能化的 NS，也称为改性纳米二氧化硅 (mNS)。本研究探讨了使用这种 mNS 作为苯乙烯-丁二烯橡胶/丙烯腈-丁二烯橡胶 (SBR/NBR) 复合材料填料的影响。结果表明，TESPT中的硅烷醇基团与NS表面形成化学连接，显着提高了橡胶基纳米复合材料的硫化效率并改善了其机械性能。这种增强的原因是 SCA 对 NS 进行了原位表面改性，显着提高了填料与橡胶基体的混溶性和相容性。填充 NS 和 mNS 的 SBR/NBR 纳米复合材料的拉伸强度和撕裂强度显着增强，与 SBR/NBR 硫化胶相比分别提高了 161% 和 70%。