干摩擦条件下聚四氟乙烯材料的耐磨改进研究OA
Boosting Wear Resistance of Polytetrafluoroethylene Materials Under Dry Friction Conditions
将白云石(dolomite,简写为 Dol)微粉和不同质量分数(5％、15％和25％)的微米石墨片(graphite,简写为 Gr)混入聚四氟乙烯(PTFE)悬浮树脂中制备了一系列复合材料,在干摩擦条件下对比其与轴承钢对磨时的摩擦学行为.结果表明:纯 PTFE 的摩擦系数为0.15,填充质量分数为20％的 Dol 微粉后其耐磨性能显著提高,磨损率由纯PTFE 的1.2×10-4 mm3/(N·m)下降至1.6×10-5 mm3/(N·m),磨损率降低了86.7％.在此基础上加入 Gr,复合材料的磨损率和摩擦系数进一步降低.尤其当添加的 Gr 质量分数为15％时,复合材料的磨损率降至1.1×10-5 mm3/(N·m),其耐磨性能相比纯 PTFE 提高了1 个数量级,当 Gr 的添加量为25％时,配副的摩擦系数降至0.09,其润滑性能相比纯 PTFE 提高了40％.
A series of polytetrafluoroethylene(PTFE)based composites were prepared by incorporating dolomite(Dol)and micron graphite(Gr)flakes with different mass fractions,i.e.,5％,15％and 25％,and their tribological properties when slid against bearing steel undel dry friction were examined.The results showed that the friction coef-ficient of pure PTFE was 0.15.After filling with 20 wt％Dol,its wear resistance was significantly improved.The wear rate decreased from 1.2×10-4 mm3/(N·m)of pure PTFE to 1.6×10-5 mm3/(N·m),reduced by 86.7％.On this basis,adding Gr further reduced the wear rate and friction coefficient of the composite material.Es-pecially when the filling mass fraction was 15 wt％,the wear rate decreased to 1.1×10-5 mm3/(N·m),indicating that its wear resistance was improved by approximately one order of magnitude(i.e.,the wear rate was reduced to a-bout one-tenth of that of pure PTFE).When the Gr content was 25 wt％,the friction coefficient of the tribo-pair de-creased to 0.09,representing a reduction of 40％compared with that of pure PTFE.
张利刚
宿州学院化学化工学院,安徽 宿州,234000
通用工业技术
聚四氟乙烯改性干摩擦耐磨性能
polytetrafluoroethylenemodificationdry frictionwear resistance
《宿州学院学报》 2026 (6)
11-15,5
安徽省高校杰出青年科研项目(2022AH020083)宿州学院博士(后)科研启动基金项目(2022BSK004).
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