Manufacture and properties of graphite oxide/natural rubber- nitrile-butadiene rubber composites
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摘要: 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Hummers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%。Abstract: In order to investigate the reinforcement and modification effects of graphite oxide (GO) on blending rubber, GO was synthesized by modified Hummers method, and GO/natural rubber (NR)-nitrile-butadiene rubber (NBR) composites were fabricated by latex co-coagulation technology firstly. Then, SEM, FTIR, XRD, swelling tests and mechanical property tests were employed to characterize the morphologies, structures and mechanical properties of GO, NR-NBR vulcanized rubber and GO/NR-NBR composites. The results show that the GO obtained contains a large amount of oxygen-containing functional groups, the oxidation effect is good; GO is homogeneously dispersed in rubber matrix, and the roughness of stretching section for GO/NR-NBR composites improves obviously. The apparent cross-linking density of the composites increases for the filling of GO. The mechanical properties of GO/NR-NBR composites improve with GO content increasing. When GO content is 3.0wt%, the tensile strength, tensile stress at 100% and Shore A hardness of GO/NR-NBR composites increase by 53.3%, 67.3% and 10.5%, respectively, and the elongation at break decreases by 9.6%.
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期刊类型引用(8)
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