In this work, a novel hybrid additive for water-based lubrication combining graphene oxide (GO) and brush-like chitosan-based copolymer (chitosan-graft-poly (N-isopropylacrylamide), Chitosan-g-PNIPAM) was developed. The GO/Chitosan-g-PNIPAM nanohybrids were fabricated by a facile in-situ non-covalent assembly strategy. The tribological performance of nanohybrids with different mass ratios of GO and copolymer was investigated. The results demonstrated superior friction-reducing and anti-wear properties at high contact load condition. It could reduce the mean coefficient of friction (COF) by 40% compared with pristine GO and by 84% compared with individual copolymer. Meanwhile, the wear rate was also decreased by 15% and 47%, respectively. Furthermore, this work provides a novel approach to develop green nanoadditives for water-based lubrication through rational combination of 2D materials and brush-like copolymer.

在这项工作中，开发了一种新型的水基润滑混合添加剂，将氧化石墨烯（GO）和刷状壳聚糖基共聚物（壳聚糖接枝聚（N-异丙基丙烯酰胺），壳聚糖g -PNIPAM）结合在一起。GO /壳聚糖-g-PNIPAM纳米杂化物是通过方便的原位制备的非共价组装策略。研究了不同质量比的GO和共聚物的纳米复合材料的摩擦学性能。结果表明，在高接触载荷条件下，具有优异的减摩和抗磨性能。与原始GO相比，它可以将平均摩擦系数（COF）降低40％，与单个共聚物相比，可以降低84％。同时，磨损率也分别降低了15％和47％。此外，这项工作提供了一种通过合理组合2D材料和刷状共聚物来开发用于水基润滑的绿色纳米添加剂的新颖方法。