Graphene oxide (GO)/hydrogenated carboxylated nitrile–butadiene rubber (HXNBR) composites were prepared by a solution-blending method. The GO monolayers with 0.9 nm in thickness, more than 2.5 μm in width and 3 μm in length were exfoliated from natural flake graphite by a modified Hummers method and could be further dispersed homogeneously in HXNBR matrix even for the GO contents up to 1.3 vol.%. The addition of 0.44 vol.% of GO nanosheets enhanced the tensile strength and modulus at 200% elongation of HXNBR by more than 50% and 100%. This is believed to be due to strong interfacial interactions between the oxygen-containing functional groups on the surfaces of GO nanosheets and the carboxyl groups in HXNBR. Moreover, this general observation is further supported by the increase of the glass transition temperature of HXNBR from −23.2 to −21.6 °C, at a GO content of 1.3 vol.%. The results indicated that GO efficiently reinforced HXNBR due to the good dispersion and strong interfacial interactions.

中文翻译：

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用剥离氧化石墨烯增强氢化羧基丁腈橡胶

通过溶液共混法制备了氧化石墨烯（GO）/氢化羧基丁腈橡胶（HXNBR）复合材料。通过改进的 Hummers 方法从天然鳞片石墨中剥离出厚度为 0.9 nm、宽度超过 2.5 μm、长度为 3 μm 的 GO 单层，即使 GO 含量高达 1.3 vol.，也可以进一步均匀分散在 HXNBR 基质中。 %。添加 0.44 vol.% GO 纳米片后，HXNBR 在 200% 伸长率下的拉伸强度和模量提高了 50% 和 100% 以上。这被认为是由于 GO 纳米片表面的含氧官能团与 HXNBR 中的羧基之间的强界面相互作用。此外，HXNBR 的玻璃化转变温度从 -23.2°C 增加到 -21.6°C 进一步支持了这一普遍观察，GO 含量为 1.3 vol.%。结果表明，由于良好的分散性和强的界面相互作用，GO 有效地增强了 HXNBR。