Friction between filler/filler and filler/matrix in rubber composites is the main factor affecting the heat build-up. In this study, we used dodecanol and silane coupling agent KH-592 to co-modify silica to prepare silica/natural rubber (NR) composites. When dodecanol and KH-592 are grafted onto the surface of silica at the same time, dodecanol can also shield part of the hydroxyl groups by its molecular chain length, which further improves the dispersibility of silica particles. The silane coupling agent KH-592 can form a bridge structure between the silica and the NR matrix under the action of a mercapto group, and improve the interaction between the filler and the matrix. By controlling the use ratio of dodecanol and KH-592, the dispersion of the filler and the interaction between the filler and the matrix can be adjusted. Thereby, the friction between the filler/filler and the filler/matrix is reduced, and a low heat build-up rubber composite material is prepared. Through co-modification, we prepared a series of low-heat build-up silica/NR composites, where the minimum heat generation reached 13∘C. The co-modified silica/NR composite material not only meets the requirements of green tires, but also has low heat build-up characteristics, providing a new strategy for preparing green and energy-saving tires.

中文翻译：

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十二烷醇和 KH-592 共改性二氧化硅制备低发热和高性能天然橡胶复合材料

橡胶复合材料中填料/填料和填料/基体之间的摩擦是影响热量积聚的主要因素。在本研究中，我们使用十二烷醇和硅烷偶联剂 KH-592 对二氧化硅进行共改性，制备二氧化硅/天然橡胶 (NR) 复合材料。当十二烷醇和KH-592同时接枝到二氧化硅表面时，十二烷醇还可以通过其分子链长度屏蔽部分羟基，进一步提高二氧化硅颗粒的分散性。硅烷偶联剂KH-592可以在巯基的作用下，在二氧化硅与NR基体之间形成桥接结构，改善填料与基体的相互作用。通过控制十二烷醇与KH-592的使用比例，可以调节填料的分散性以及填料与基体的相互作用。从而，降低了填料/填料与填料/基体之间的摩擦，制备了低发热橡胶复合材料。通过共改性，我们制备了一系列低发热二氧化硅/NR复合材料，其最小发热达到13∘C、共改性二氧化硅/NR复合材料不仅满足绿色轮胎的要求，而且具有低生热特性，为制备绿色节能轮胎提供了新的策略。