With the emerging of sustainability, the fabrication of effective and eco-friendly agents for rubber industry has attracted extensive attention. In this study, a novel and nontoxic titanium dioxide-based vulcanization accelerator (xanthate-modified nanotitanium dioxide (TDSX)) with excellent antibacterial performance, for the first time, was synthesized under the catalyst of ceric ammonium nitrate. Notably, the thermal stability of xanthate was greatly enhanced after being grafted on titanium dioxide (TiO 2 ) nanoparticles, in which the activation energy was increased from 6.4 to 92.5 kJ/mol, enabling the obtained TDSX with multiple functions, mainly consisting of fabulous vulcanization-promoting effects, reinforcing effects, antibacterial properties, and anti-ultraviolet aging effects for natural rubber (NR). Simultaneously, the TDSX can be effectively and uniformly dispersed in the rubber matrix along with the developed interface interaction between TDSX particles and rubber matrix. Compared to the traditional accelerators 2-mercaptobenzothiazole (M) system, the tensile strength and the tearing strength of NR/TDSX was improved by 26.3 and 40.4%, respectively. Potentially, our work for preparing green vulcanization accelerator can provide a new design strategy for multifunctional high performance elastomer materials. Graphical abstract

中文翻译：

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黄原酸酯改性纳米二氧化钛作为一种新型硫化促进剂，增强天然橡胶的机械和抗菌性能

随着可持续性的出现，橡胶工业高效环保剂的制备受到了广泛关注。本研究首次在硝酸铈铵的催化下合成了一种新型、无毒、具有优异抗菌性能的二氧化钛基硫化促进剂（黄原酸酯改性纳米二氧化钛（TDSX））。值得注意的是，黄药接枝在二氧化钛（TiO 2 ）纳米颗粒上后的热稳定性大大增强，其中活化能从6.4增加到92.5 kJ/mol，使获得的TDSX具有多种功能，主要包括出色的硫化-天然橡胶（NR）的促进作用、补强作用、抗菌性能和抗紫外线老化作用。同时地，随着TDSX颗粒与橡胶基体之间的界面相互作用的发展，TDSX可以有效且均匀地分散在橡胶基体中。与传统促进剂2-巯基苯并噻唑(M)体系相比，NR/TDSX的拉伸强度和撕裂强度分别提高了26.3%和40.4%。潜在地，我们制备绿色硫化促进剂的工作可以为多功能高性能弹性体材料提供新的设计策略。图形概要 我们制备绿色硫化促进剂的工作可以为多功能高性能弹性体材料提供新的设计策略。图形概要 我们制备绿色硫化促进剂的工作可以为多功能高性能弹性体材料提供新的设计策略。图形概要