Physico-chemical and tribological properties of commercial oil – bio-lubricant mixtures dispersed with graphene nanoplatelets

Banavathu, Koteswara Rao; Chebattina, Kodanda Rama Rao; Srinivas, V.; Moorthy, Ch V. K. N. S. N.; Pullagura, Gandhi

doi:10.1039/d3ra02689b

Cited by 3 publications

(1 citation statement)

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“…The introduction of liquid lubricants to the sliding interfaces has proven to be a simple and effective approach for minimizing frictional wear in the industrial fields [ 21 , 22 , 23 ]. Moreover, the addition of two-dimensional (2D) materials (e.g., graphene [ 24 , 25 ], molybdenum disulfide [ 26 ], and layered double hydroxide nanoplatelets [ 27 ]) to lubrication oils could enhance the load-bearing capacity and wear resistance to further mitigate the frictional wear [ 28 , 29 ]. Therefore, it can be assumed that the addition of lubrication oils in the TENGs not only could promote tribological behavior and mechanical durability but also could enhance the electrical output performance.…”

Section: Introductionmentioning

confidence: 99%

Super-Low Friction Electrification Achieved on Polytetrafluoroethylene Films-Based Triboelectric Nanogenerators Lubricated by Graphene-Doped Silicone Oil

Chen,

Zhao,

Wang

et al. 2023

Micromachines

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The novel proposal of Wang’s triboelectric nanogenerator (TENG) has inspired extensive efforts to explore energy harvesting devices from the living environment for the upcoming low-carbon society. The inevitable friction and wear problems of the tribolayer materials become one of the biggest obstacles for attaining high-performance TENGs. To achieve super-low friction electrification of the TENGs, the tribological and electrical behaviors of the sliding-mode TENGs based on polytetrafluoroethylene (PTFE) films and metallic balls under both dry friction and liquid lubrication conditions were investigated by using a customized testing platform with a ball-on-flat configuration. Most interestingly, a super-low friction coefficient of 0.008 was achieved under graphene-doped silicone oil lubrication. The corresponding wear rate of the PTFE film was drastically decreased to 8.19 × 10−5 mm3/Nm. Simultaneously, the output short-circuit current and open-circuit voltage were enhanced by 6.8 times and 3.0 times, respectively, compared to the dry friction condition. The outstanding triboelectrical performances of the PTFE film when sliding against a steel ball are attributed to the synergistic lubricating effects of the silicone oil and the graphene nanosheets. The current research provides valuable insights into achieving the macro-scale superlubricity of the TENGs in practical industrial applications.

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