Carbon black (CB) is a principal filler in rubber industry due to its excellent reinforcing effect and low-cost. It is of significant importance but challenging to modify the inert CB for addressing the dilemma of increased energy loss raised by the addition of CB. In this work, we reported the functionalization of CB through redox polymerization of rhodanine on its surface, and utilized the modified CB as a novel reinforcement for natural rubber (NR). Polyrhodanine coated on CB can covalently couple with NR chains by capturing macroradicals and serve as an intelligent interfacial bridge between CB and NR, which greatly improves CB dispersion and strengthens interfacial adhesion in the composites. As a consequence, the energy loss of the resultant composites is remarkably decreased, showing great advantages in reducing the rolling resistance and heat build-up for tire applications.

炭黑（CB）因其优异的补强效果和低成本而成为橡胶工业的主要填料。修改惰性 CB 以解决由添加 CB 引起的能量损失增加的困境非常重要但具有挑战性。在这项工作中，我们报道了通过罗丹宁在其表面氧化还原聚合对 CB 的功能化，并利用改性的 CB 作为天然橡胶 (NR) 的新型增强剂。包覆在 CB 上的聚罗丹宁可以通过捕获大自由基与 NR 链共价偶联，并作为 CB 和 NR 之间的智能界面桥梁，极大地改善了 CB 的分散性并增强了复合材料中的界面粘合力。因此，所得复合材料的能量损失显着降低，