Abstract In this study, cetyl trimethyl ammonium bromide (CTAB) modified montmorillonite (MMT) which is called as organoclay (OMMT) was mixed with natural rubber, and masterbatches were produced using the acid-free co-coagulation (AFCC) method in the presence of a combined gelling agent, a mixture of CTAB and sodium dodecyl sulfate. The OMMT was further modified by grafting of bis(triethoxysilylpropyl)tetrasulfide as to reduce the surface energy in silanated organoclay (OMMT-S). As expected, the nanocomposites prepared with OMMT-S compared to those with OMMT exhibited greater mechanical properties due to the development of rubber–clay interactions and due to proper dispersion of small clay layers in the rubber matrix combined with the gelling agent. The improvement of elongation at break, hardness and tear strength of the nanocomposites with OMMT/OMMT-S was an added advantage when the nanocomposites are prepared using the AFCC method without having any adverse effect from the combined gelling agent. Graphical abstract

中文翻译：

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通过将硅烷化有机粘土掺入天然橡胶胶乳增强天然橡胶-粘土纳米复合材料的机械性能

摘要 本研究将十六烷基三甲基溴化铵 (CTAB) 改性蒙脱石 (MMT) 称为有机粘土 (OMMT) 与天然橡胶混合，并在存在下使用无酸共凝 (AFCC) 法生产母料。一种组合胶凝剂，CTAB 和十二烷基硫酸钠的混合物。通过接枝双（三乙氧基甲硅烷基丙基）四硫化物进一步改性 OMMT，以降低硅烷化有机粘土 (OMMT-S) 的表面能。正如预期的那样，与使用 OMMT 制备的纳米复合材料相比，使用 OMMT-S 制备的纳米复合材料由于橡胶-粘土相互作用的发展以及橡胶基质中小粘土层与胶凝剂的适当分散而表现出更高的机械性能。断裂伸长率的提高，当使用 AFCC 方法制备纳米复合材料且组合胶凝剂没有任何不利影响时，具有 OMMT/OMMT-S 的纳米复合材料的硬度和撕裂强度是一个额外的优势。图形概要