“…The most relevant properties of graphene are its high conductive capacity, hardness, and strength as a very thin layered structure. Regarding the tribological behaviour, it has been dispersed on an oil lubricant to reduce the wear and friction of mechanical elements immersed in the lubricant [40] and applied to silicon dioxide (SiO2) substrates [41]. Literature concerning the tribological behaviour of graphene applied to polymers is limited to the study of PEEK [42], acrylonitrile butadiene rubbers (NBRs) [43], PTFE [44], and polyphenylene sulphide (PPS) [45], with graphene used for coating purposes.…”