Functionalized graphene as an effective antioxidant in natural rubber

Functionalized graphene as an effective antioxidant in natural rubber
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功能化石墨烯作为天然橡胶中的有效抗氧化剂

DOI:
10.1016/j.compositesa.2017.12.028
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发表时间:
2018-04
期刊:
Composites Part A: Applied Science and Manufacturing
影响因子:
--
通讯作者:
Zeng Xingrong
Zeng Xingrong
中科院分区:
其他
文献类型:
--
作者:
Zhang Lin;Li Hongqiang;Lai Xuejun;Liao Xiaofeng;Wang Jing;Su Xiaojing;Liu Heng;Wu Wenjian;Zeng Xingrong

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为了提高天然橡胶的热氧化老化性能,以(3-巯基丙基)三甲氧基硅烷为桥联剂,将2-叔丁基-6-(3-叔丁基-2-羟基-5-甲基苯基)甲基-4-甲基对苯基丙烯酸酯(GM)接枝到氧化石墨烯(GO)上,制备了一种功能化石墨烯(FGE)。与GO相比,FGE出现了更多的卷曲表面并达到了134°的更高水接触角。通过乳胶混合的方法,均匀分散的FGE使NR硫化胶的热稳定性明显提高。重要的是,NR/FGE纳米复合材料表现出优异的热氧化老化性能,这不仅归因于受阻酚基团和硫醚键的协同抗氧化作用,还归因于石墨烯片对氧的阻隔作用。我们的研究结果为制备功能化石墨烯作为橡胶和其他聚合物材料的有效抗氧化剂提供了一种新策略。
To improve the thermo-oxidative aging resistance of natural rubber, a kind of functionalized graphene (FGE) was prepared by grafting 2-tert-butyl-6-(3-tertbutyl-2-hydroxy-5-methylphenyl) methyl-4-methylp-henyl acrylate (GM) onto graphene oxide (GO) using (3-mercaptopropyl) trimethoxysilane as bridging agent. In comparison to GO, FGE appeared more curled surface and reached the higher water contact angle of 134°. By latex-mixing method, the uniformly dispersed FGE endowed NR vulcanizates with obviously improved thermal stability. Importantly, the NR/FGE nanocomposites exhibitd excellent thermo-oxidative aging resistance, which was attributed to not only the synergistic antioxidative effect of hindered phenol groups and thioether bonds, but also the barrier role of graphene sheets to oxygen. Our findings provide a new strategy to prepare functionalized graphene as effective antioxidant for rubber and other polymer materials.
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