ISSN   1004-0595

CN  62-1095/O4

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王娜, 王宏刚, 任俊芳, 高贵, 陈生圣, 赵更锐, 杨亚文, 王金清. PTFE@SiO2核壳型添加剂在不同实验条件下的的水润滑性能[J]. 摩擦学学报, 2021, 41(4): 522-531. DOI: 10.16078/j.tribology.2020193
引用本文: 王娜, 王宏刚, 任俊芳, 高贵, 陈生圣, 赵更锐, 杨亚文, 王金清. PTFE@SiO2核壳型添加剂在不同实验条件下的的水润滑性能[J]. 摩擦学学报, 2021, 41(4): 522-531. DOI: 10.16078/j.tribology.2020193
WANG Na, WANG Honggang, REN Junfang, GAO Gui, CHEN Shengsheng, ZHAO Gengrui, YANG Yawen, WANG Jinqing. Water Lubrication Properties of PTFE@SiO2 Particles as Novel Additive under Different Testing Conditions[J]. TRIBOLOGY, 2021, 41(4): 522-531. DOI: 10.16078/j.tribology.2020193
Citation: WANG Na, WANG Honggang, REN Junfang, GAO Gui, CHEN Shengsheng, ZHAO Gengrui, YANG Yawen, WANG Jinqing. Water Lubrication Properties of PTFE@SiO2 Particles as Novel Additive under Different Testing Conditions[J]. TRIBOLOGY, 2021, 41(4): 522-531. DOI: 10.16078/j.tribology.2020193

PTFE@SiO2核壳型添加剂在不同实验条件下的的水润滑性能

Water Lubrication Properties of PTFE@SiO2 Particles as Novel Additive under Different Testing Conditions

  • 摘要: 采用原位聚合法制备了聚四氟乙烯@二氧化硅(PTFE@SiO2)复合粒子. 利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、粒径分布仪以及傅立叶红外光谱仪(FTIR)对复合粒子的形貌、粒径分布和组成结构进行了分析. 结果表明:所制备的复合粒子呈核壳型复合结构,粒子尺寸处于亚微米级别. 分散性试验表明:该粒子在水中具有良好的分散性和稳定性. 利用LSR-2M往复式摩擦磨损试验机测试了不同试验条件下复合粒子在水环境中的摩擦学性能,结果表明:在常温、0.019 m/s滑动速率以及0.2 μm的钢盘粗糙度下,PTFE@SiO2润滑剂具有最佳的摩擦学性能;相比于纯水和添加了PTFE/SiO2的润滑剂,其摩擦系数降低了近80%,磨损体积减小了1~2个数量级. 分析表明:PTFE@SiO2复合粒子优异的水润滑性能主要与核壳结构的存在以及在摩擦过程中形成的高质量转移膜密切相关.

     

    Abstract: Novel water lubricating additive of polytetrafluoroethylene@silica (PTFE@SiO2) core-shell composite particles with submicron size was prepared by in-situ polymerization. The core-shell structure, composition and size distribution of the composite particles were determined by scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectrum (FTIR) and particle size distribution, respectively. The water dispersion test indicated that the as-synthesized particles had good water dispersibility and stability. The tribological properties of the particles as water lubricating additive at different testing conditions was investigated by LSR-2M reciprocating friction and wear testing machine. The results illustrated that the PTFE@SiO2 lubricant had the best water lubricating properties under the speed of 0.019 m/s and the steel surface roughness of 0.2 μm as well as the ambient temperature. The friction coefficient was decreased nearly by 80% and the wear volume was reduced by 1~2 order of magnitude when compared with the lubricants of pure water and water with physically mixed PTFE and SiO2 (PTFE/SiO2). SEM observation demonstrated that the existence of core-shell structure and the formation of high-quality transfer film during the friction all contributed to the excellent water lubrication performances of PTFE@SiO2 lubricant, and then a possible lubrication mechanism on this basis was also proposed.

     

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