为研究氧化石墨烯(GO)对共混橡胶的补强改性作用,首先,通过改进的H ummers方法制备了GO,并通过乳液共混法制备了GO/天然橡胶(NR)-丁腈橡胶(NBR)复合材料;然后,采用SEM、FTIR、XRD、溶胀测试和力学性能测试表征了GO、NR-NBR硫化胶和GO/NR-NBR复合材料的微观形态、结构和力学性能.结果表明:所得GO含有大量的含氧官能团,氧化效果较好;橡胶基体中GO分散均匀,且GO/NR-NBR复合材料的拉伸断面粗糙程度显著增加;GO的填充可以提高复合材料的表观交联密度;GO/NR-NBR复合材料的力学性能随着GO含量的增加而改善,当GO含量为3.0wt％时,GO/NR-NBR复合材料的拉伸强度、100％定伸应力和邵氏A硬度分别提高了53.3％、67.3％和10.5％,断裂伸长率降低了9.6％.
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