Improving the tribological performance of a biodegradable lubricant adding graphene nanoplatelets as additives

نویسندگان

چکیده

• Eight nanolubricants based on two different pristine graphene nanoplatelets were tribologically studied. Graphene with larger lateral size showed better stability in the base oil. 0.055 wt% nanolubricant concentration revealed highest friction and wear reduction for GnP40 GnP7, respectively. Tribofilm formation surface repairing lubrication mechanisms due to nanoadditives detected worn steel disks. This research is investigation of tribological properties a biodegradable polymeric ester lubricant (BIOE) additivated (GnPs), named as GnP7 GnP40. These GnPs have sizes 7 40 ?m, thickness 3 10 nm, Four nanoadditive loadings: 0.015, 0.035, 0.075 been used. Stability has investigated using visual control refractive index evolution during time, revealing slightly formulated largest (GnP40). The influence these carbon-based antifriction antiwear capabilities BIOE analysed. For this purpose, rotational tests taken eight under 20 N working load 340 m sliding distance. All coefficients area lower than those previously reported unadditivated BIOE. As regards friction, ideal loading both was GnP, being best anti-friction behaviour obtained additive (up 26% reduction), whereas GnP7/BIOE leads anti-wear capability reductions up 56%. Finally, from Raman microscopy roughness assessments surfaces, it can be determined that good performance owing protective film mechanism.

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ژورنال

عنوان ژورنال: Journal of Molecular Liquids

سال: 2022

ISSN: ['0167-7322', '1873-3166']

DOI: https://doi.org/10.1016/j.molliq.2021.117797