Owing to its remarkable electrical, mechanical and thermal properties, graphene has been considered the most promising reinforcing filler for the development of rubber nanocomposites. In this work, a novel interfacial structure consisting of reduced graphene oxide (rGO)/N-tert-butyl-2-benzothiazole sulfonamide (NS)/natural rubber (NR) (NR/NS-rGO) with covalent bond connections was fabricated using one-step modification and coprecipitation methods. When the filler loading of NS-rGO is 0.42 vol.%, not only the thermal conductivity of the rubber composite increases to 0.237 Wm−1 K−1, which is 21.5% higher than that of pure NR; meanwhile, the internal heat generation decreases to 2.6 °C, which is 45.8% lower than that of reduced graphene oxide (rGO)/ascorbic acid (VC)/natural rubber (NR) (NR/VC-rGO), and the mechanical properties have been greatly improved. The results demonstrated that the covalent bond connections greatly reduced interfacial thermal resistance at the filler/matrix interface. Furthermore, the enhanced interfacial interaction reduced frictional heat generation at the filler/matrix interface. More importantly, this strategy provided creative insights into the high application potential of graphene in the rubber industry.

中文翻译：

---

NS改性氧化石墨烯制备高导热、低发热、强界面相互作用的天然橡胶

由于其卓越的电学、机械和热学性能，石墨烯被认为是开发橡胶纳米复合材料最有前途的补强填料。在这项工作中，使用共价键连接由还原氧化石墨烯 (rGO)/N-叔丁基-2-苯并噻唑磺酰胺 (NS)/天然橡胶 (NR) (NR/NS-rGO) 组成的新型界面结构一步修饰和共沉淀法。当 NS-rGO 的填料负载量为 0.42 vol.% 时，不仅橡胶复合材料的热导率增加到 0.237 Wm-1 K-1，比纯 NR 高 21.5%；同时，内部发热降低至2.6°C，比还原氧化石墨烯（rGO）/抗坏血酸（VC）/天然橡胶（NR）（NR/VC-rGO）低45.8%，并且机械性能有了很大的提高。结果表明共价键连接大大降低了填料/基体界面处的界面热阻。此外，增强的界面相互作用减少了填料/基体界面处的摩擦生热。更重要的是，该策略为石墨烯在橡胶行业的高应用潜力提供了创造性的见解。