如何有效解决小分子抗氧剂在聚合物材料加工、贮存及使用过程中因挥发、迁移或抽提而造成的物理损失及环境污染，是当前高分子材料及其制品抗氧化亟待解决的重要科学问题。本项目拟以双酚单丙烯酸酯类化合物和含醇羟基（或氨基）功能硫醇为原料，通过巯基-丙烯酸酯Michael加成反应合成含有醇羟基（或氨基）和硫醚基团的受阻酚作为抗氧化因子（AF）。进而利用其与氧化石墨烯（GO）表面的羧基或环氧基团通过酯化或开环反应对GO表面进行共价键改性，得到表面具有硫醚和受阻酚基团的抗氧化因子功能化石墨烯（AF-GO）。优化AF、GO和AF-GO的制备条件；探讨AF-GO对天然橡胶（NR）的抗热氧老化作用及其耐迁移、耐抽提性能；构建AF-GO表面化学结构与其抗氧化性能及补强效能的构效关系；揭示AF-GO在NR中的分散及其抑制NR老化的作用机理。为兼具高抗氧化和补强效能的多功能助剂的构筑及应用提供新方法和理论支撑。

It is a critical issue for the antioxidation of polymer materials and their products that effectively solving the physical loss and environment pollution of low molecular weight antioxidant due to the volatilization, migration or extraction during processing, storage and long term service of polymer. This project aim to synthesize a compound with hindered phenol, hydroxyl (or amino) and thioether groups, namely antioxidant factor (AF), through thiol–acrylate Michael addition reaction between the functional thiol with hydroxyl (or amino) and the compound with hindered phenol and acrylate. Furthermore, the AF will be intergrated with graphene oxide (GO) through either an esterification or ring opening reaction, and the graphene which is functionalized with thioether and hindered phenol groups (AF-GO) will be obatined. In this study, the synthesis conditions of the AF, GO and AF-GO will be optimized systematically. The thermo-oxidative aging resistance, extraction and migration resistances of the AF-GO for natural rubber (NR) will be detailedly investigated. Moreover, the relationship between the surface chemical structure of AF-GO and the antioxidative and reinforcing effect will be established. Additionly, the mechanisms of dispersibility and antioxidation of the AF-GO will be revealed. Through this study, the new method and theory for the mutil-function additive with highly antioxidative and reinforcing properies will be developed.