@article{ART003274545},
author={So Youn Mun and Jinuk Hwang and Da Hyun Yu and So Jung Baek and Dho Hyun Um and Dong Gi Seong and Kwang Youn Cho},
title={Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment},
journal={Carbon Letters},
issn={1976-4251},
year={2025},
volume={35},
number={6},
pages={2917-2930},
doi={10.1007/s42823-025-00966-8}
TY - JOUR
AU - So Youn Mun
AU - Jinuk Hwang
AU - Da Hyun Yu
AU - So Jung Baek
AU - Dho Hyun Um
AU - Dong Gi Seong
AU - Kwang Youn Cho
TI - Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment
JO - Carbon Letters
PY - 2025
VL - 35
IS - 6
PB - Korean Carbon Society
SP - 2917
EP - 2930
SN - 1976-4251
AB - Graphite crystals consist of a layered structure with stacked graphene sheets, and exhibit self-lubricating properties due to the facile sliding of graphene layers in the horizontal direction, facilitated by weak Van der Waals bonds along the c-axis. When this graphite material is impregnated with a lubricating liquid, it forms a solid and stable lubricating layer, and effectively reduces damage to the counter material from friction-induced wear under conditions of high-load reciprocating motion. This study investigates how oxidation-induced pore expansion and the silane treatment of graphite affect lubricating oil impregnation behavior, the friction coefficient of impregnated graphite, frictional stability, and microstructural changes at the friction surface. It was found that graphite oxidation within the chemical reaction temperature range enhanced porosity and increased the rate of lubricating oil impregnation. The functionalization of the graphite surface with hydrophobic silane coupling agents also significantly enhanced oil uptake, with a pronounced observed improvement when utilizing hydrophobic oils. Under a vertical load of 360 kgf and a surface pressure of 3 MPa, the graphite surface treated with hydrophobic silane and impregnated with oil exhibited the lowest average friction coefficient of 0.192 over 600 cycles. During the friction and wear process, a lubricating layer formed on the graphite surface, which contributes to stable wear performance. This surface modification strategy offers high applicability in industries such as automotive, aerospace, and heavy machinery, with the potential to significantly enhance component performance and extend service life under high-load, low-speed reciprocating conditions.
KW - Oil-impregnated graphite;Surface modification;Tribological performance;Friction behavior
DO - 10.1007/s42823-025-00966-8
ER -
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong and Kwang Youn Cho. (2025). Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment. Carbon Letters, 35(6), 2917-2930.
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong and Kwang Youn Cho. 2025, "Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment", Carbon Letters, vol.35, no.6 pp.2917-2930. Available from: doi:10.1007/s42823-025-00966-8
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong, Kwang Youn Cho "Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment" Carbon Letters 35.6 pp.2917-2930 (2025) : 2917.
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong, Kwang Youn Cho. Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment. 2025; 35(6), 2917-2930. Available from: doi:10.1007/s42823-025-00966-8
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong and Kwang Youn Cho. "Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment" Carbon Letters 35, no.6 (2025) : 2917-2930.doi: 10.1007/s42823-025-00966-8
So Youn Mun; Jinuk Hwang; Da Hyun Yu; So Jung Baek; Dho Hyun Um; Dong Gi Seong; Kwang Youn Cho. Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment. Carbon Letters, 35(6), 2917-2930. doi: 10.1007/s42823-025-00966-8
So Youn Mun; Jinuk Hwang; Da Hyun Yu; So Jung Baek; Dho Hyun Um; Dong Gi Seong; Kwang Youn Cho. Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment. Carbon Letters. 2025; 35(6) 2917-2930. doi: 10.1007/s42823-025-00966-8
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong, Kwang Youn Cho. Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment. 2025; 35(6), 2917-2930. Available from: doi:10.1007/s42823-025-00966-8
So Youn Mun, Jinuk Hwang, Da Hyun Yu, So Jung Baek, Dho Hyun Um, Dong Gi Seong and Kwang Youn Cho. "Enhancing the frictional performance of lubricant oil-impregnated graphite via oxidation-induced pore expansion and hydrophobic silane treatment" Carbon Letters 35, no.6 (2025) : 2917-2930.doi: 10.1007/s42823-025-00966-8
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Kwang Youn Cho
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