Akademik Veri Yönetim Sistemi
APPLIED CLAY SCIENCE, cilt.282, 2026 (SCI-Expanded, Scopus)
Developing bio-based and high-performance lubricants for sustainable metal forming processes is an increasing necessity in the industry. This study systematically investigated the cold rolling performance of palm nano-lubricant doped with oleic acid-modified kaolin nanoparticles. The nanolubricants were prepared at different particle sizes (350 nm and 650 nm) and concentrations (0.125, 0.25, and 0.5 wt%). Cold-rolling experiments were then performed on AISI 304 stainless steel strips using reduction ratios of 1.5 % and 7.5 %. The results indicate that, at a 1.5 % reduction ratio, the doping of 0.5 wt% kaolin nanoparticles with a size of 350 nm to the lubricant reduced the rolling force by 28 % compared to pure palm oil and by 40 % under dry conditions. Furthermore, surface roughness values showed significant improvement, with enhancements of 35 % and 51 %, respectively. Small particles (350 nm) were found to effectively fill surface micro-voids to form a protective tribofilm layer, reducing friction and wear and significantly improving surface quality. Two-dimensional (2D) roughness measurements, three-dimensional (3D) area scanning analyses, and material ratio curves (MRC) support each other, confirming this mechanism. The study demonstrates that doping surface-modified kaolin nanoparticles suitable for vegetable-based lubricants is a promising approach for developing new-generation nanolubricants. Under the tested laboratory-scale conditions, these nanolubricants showed potential to reduce friction and wear in cold rolling applications, which may contribute to lower energy consumption and longer roll life, while supporting sustainable manufacturing objectives.