Dynamic Covalent Polymer–Nanoparticle Networks as High-Performance Green Lubricants: Synergetic Effect in Load-Bearing Capacity

• DOI: 10.1021/acs.macromol.4c01397
• Publication Date: 2024-08-22T05:40:38Z
• Authors: Hua Xue; Changhao Wang; Fengchun Liang; Jiapeng He; Qun He; Meirong Cai; Qiang Tian; Guanjun Chang; Qing Huang; Muhammad Siddiq; Feng Zhou; Weifeng Bu
• Keywords: Dry lubricant

Although conventional lubricant additives containing sulfur and phosphorus elements have been widely utilized to lower friction wear, harmful emissions caused by the lubrication processes resulted in serious environmental concerns. In this work, a series of polymer–nanoparticle networks situ constructed base oil coupling phenylboronic ester-containing telechelic polymers silica or titania nanoparticles via dynamic B–O covalent bonds. These sulfur- phosphorus-free composites appear as form oleogels, wherein show long-time dispersible stability. Ball-on-disc reciprocating sliding tribological tests display that give rise remarkable reductions coefficient (up 52%) wear volume 93%). Moreover, high bearing loads are readily realized at 1100 N, which is higher than those (900 N) (600 alone. Such positive cooperativity load-bearing capacity originates from nanometric thick tribofilms both B2O3 β-SiC TiC formed rubbing interfaces. The present concept combining with chemistry provides promising approach create high-performance green lubricants.