The high gas barrier property of a rubber composite is of great significance for reducing the exhaust gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the gas barrier property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and gas barrier properties. When filling 5 phr fillers, the tensile strength and gas barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.

橡胶复合材料的高阻气性对于减少轮胎滚动阻力所产生的废气排放具有重要意义，因此该因素对环境保护的贡献很大。增强的共价界面和交联网络对橡胶复合材料的阻气性至关重要。本研究采用乳胶配合法和硫醇-烯点击反应的协同策略制备了γ-巯基丙基三乙氧基硅烷（MPS）改性GO（MGO）/苯乙烯-丁二烯橡胶（SBR）复合材料。发现在150°C的交联过程中，MGO中的巯基与SBR分子中的乙烯基通过硫醇-烯点击反应发生反应，从而在界面上形成了强烈的化学相互作用，形式为GO-MPS-橡胶和增强的交联网络。与此同时，强大的界面促进了MGO在SBR中的分散。MGO的均匀分散，MGO和SBR分子之间的牢固界面以及增强的交联网络可改善机械和气体阻隔性能。当填充5 phr填料时，与GO / SBR复合材料相比，MGO / SBR复合材料的拉伸强度和阻气性分别提高了19.0％和37.5％。