Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10^–5) mm³/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

将不同的离子液体改性的石墨烯纳米片（IG）引入聚酰亚胺（PI）中，以改善形状记忆IG / PI复合材料的摩擦学，热学和机械性能。结果表明，使用1-氨基乙基-3-甲基咪唑溴化物改性石墨烯纳米片（IG-1）时，IG-1 / PI复合材料（IGPI-1）的激光驱动形状恢复率为73.02％，为49.36。比纯PI高％。此外，IGPI-1复合材料在15 s内达到了最大的形状恢复率。此外，在干式滑动条件下，添加IG可以显着改善复合材料的摩擦学性能。IGPI-1具有最佳的自润滑性能。与纯PI相比，摩擦系数（0.19）和磨损率（2.62×10 ^–5）mm ³/ Nm）分别降低了44.1％和24.2％，IGPI-1的T10％提高了32.2°C。IGPI-1的Tg达到256.5°C，比纯PI的Tg高8.4°C。此外，IGPI-1的拉伸强度和模量分别达到82.3 MPa和1.18 GPa，与纯PI相比分别显着提高了33.6％和29.8％。我们希望这项工作将有助于制备具有优异的摩擦，热和机械性能的形状记忆材料。