▎ 摘　　要

We enhanced tribological and mechanical properties of styrene-butadiene rubber (SBR) by designing double layer aligned-graphene nanosheets (aligned-GNSs)/SBR composites with one-step emulsion polymerization preparation method. The composites consisted of two layers, one is the SBR layer and the other is aligned-GNSs/SBR layer, in which the graphene nanosheets (GNSs) regularly aligned. The resulted composites exhibited mega increase of tribological property as well as mechanical property. With the increase of GNSs contents from 0.5 to 5 wt %, both the friction coefficient and volume wear rate steadily declined, and the mechanics dramatically increased. Such as 59% decrease of friction coefficient and 1778% increase of the initial tensile modulus when the addition of GNSs is 5 wt %. The above results are mainly due to the well aligned-GNSs in SBR, which can take full advantage of the unique properties of GNSs two-dimensional materials. The detailed mechanisms of improving tribological and mechanical properties were discussed in the study. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46939.