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采用石墨烯(TrG)和碳纳米管(MWNTs)增强改性硅橡胶和顺丁橡胶。3%(wt)石墨烯填充橡胶后硅橡胶的拉伸强度提高了近14倍,邵氏硬度由20提高到了47,导电逾渗值为2%(wt),此时复合材料的电导率为1×10-5S/cm;碳纳米管对硅橡胶的补强效果和导电性也都有提高,但是不如石墨烯的效果明显。在顺丁橡胶石墨烯或者碳纳米管复合体系中出现了同样的现象。尽管TrG和MWNTs的化学结构相似,由于TrG和MWNTs的形貌和拓扑结构不同,导致填料与聚合物基体的相互作用有很大差异,石墨烯比碳纳米管在橡胶基体中更易分散。这主要是由于石墨烯与聚合物基底材料之间有更大的接触面积,使得石墨烯与橡胶之间的相互作用更加强烈,即使在石墨烯顺丁橡胶这种弱相互作用体系中,石墨烯也能实现良好的分散。
Graphene (TrG) and carbon nanotubes (MWNTs) are used to enhance the modified silicone and butadiene rubber. The tensile strength of 3% (wt) graphene filled rubber increased by nearly 14 times, the Shore hardness increased from 20 to 47, and the conductive percolation value was 2% (wt). The conductivity of the composites was 1 × 10-5S / cm; carbon nanotubes on silicone rubber reinforcement and conductivity have also increased, but not as good as graphene effect. The same phenomenon occurs in a butadiene rubber graphene or carbon nanotube composite system. Although the chemical structures of TrG and MWNTs are similar, the interaction between filler and polymer matrix is very different due to the different morphologies and topologies of TrG and MWNTs. Graphene is easier to disperse than carbon nanotubes in rubber matrix. This is mainly due to the larger contact area between the graphene and the polymer base material, which makes the interaction between graphene and rubber stronger, even in the weak interaction system of graphene, butadiene rubber, graphene Good dispersion can also be achieved.