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Exfoliation approach for preparing high conductive reduced graphite oxide and its application in natural rubber composites

机译：高导电性还原氧化石墨的剥离方法及其在天然橡胶复合材料中的应用

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High conductivity reduced graphite oxide (RGO) was prepared by exfoliation of graphite waste from the metal smelting industry. To improve the surface properties of the RGO, the graphite oxide obtained based on Hummers' method was reduced by L-ascorbic acid to give RGOV, which was then subjected to thermal reduction to obtain RGOT. The residual oxygen-containing groups in RGOV were almost completely removed by the thermal reduction and the conjugated graphene networks were restored in RGOT. The effect of the RGOT content in natural rubber (NR) on the cure, electrical and mechanical properties of the NR-RGOT (NG) composites was evaluated. The electrical conductivity of NR was increased by the inclusion of RGOT at a percolation threshold of 5 phr, with an electrical conductivity of 8.71 x 10~(-6) S/m. The mechanical properties, i.e., the modulus, tensile strength and hardness, of NG were comparable with those of conductive carbon black filled NR ones.
机译：通过剥落金属冶炼行业的石墨废料制备高电导率降低的氧化石墨（RGO）。为了改善RGO的表面性能，将基于Hummers方法获得的氧化石墨用L-抗坏血酸还原成RGOV，然后对其进行热还原以获得RGOT。 RGOV中残留的含氧基团通过热还原几乎被完全去除，共轭石墨烯网络在RGOT中得以恢复。评估了天然橡胶（NR）中RGOT含量对NR-RGOT（NG）复合材料的固化，电气和机械性能的影响。通过在渗透阈值为5 phr时加入RGOT可以提高NR的电导率，电导率为8.71 x 10〜（-6）S / m。 NG的机械性能，即模量，拉伸强度和硬度，可与导电炭黑填充NR的机械性能相媲美。

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