纳米Al_(2)O_(3)与CaSO_(4)晶须协同填充PTFE复合材料的性能研究  

Study on Properties of PTFE Composites Filled With Nano-Al_(2)O_(3) and CaSO_(4) Whiskers

作　　者：张伟 ZHANG Wei(Jiangxi Xinyu Guoke Technology Co.,Ltd.,Xinyu Jiangxi 338000,China)

机构地区：[1]江西新余国科科技股份有限公司,江西新余338000

出　　处：《当代化工》2023年第8期1869-1872,1885,共5页Contemporary Chemical Industry

摘　　要：通过机械混合、冷压和烧结成型制备了不同质量分数的纳米Al_(2)O_(3)和CaSO_(4)晶须(CSW)协同填充PTFE复合材料,考察了PTFE复合材料的摩擦学性能,使用SEM观测了复合材料磨损表面的微观状况,并探讨了其磨损的机理。结果表明:PTFE复合材料的硬度随着纳米Al_(2)O_(3)质量分数的增加而增大;对于改性与未改性填充的两个PTFE复合材料系列,纳米Al_(2)O_(3)质量分数在5%~25%范围内与CSW共混填充PTFE均具有较好的协同效应,并都可以显著降低CSW单一填充PTFE复合材料摩擦系数和磨损率;PTFE复合材料的磨损机理随着纳米Al_(2)O_(3)质量分数的增加逐渐由黏着磨损变为轻微的磨粒磨损。PTFE composites with different mass fraction of nano-Al_(2)O_(3) and calcium sulfate whisker(CSW)were prepared by mechanical mixing,cold pressing and sintering.The tribological properties of PTFE composites were investigated.The wear surface of the composites was observed by SEM,and the wear mechanism was discussed.The results showed that the hardness of PTFE composites increased with the increase of nano-Al_(2)O_(3) mass fraction;For the two PTFE composite series of modified and unmodified filling,the PTFEfilledby 5%~25% mass fraction of nano-Al_(2)O_(3) and CSW blending had good synergistic effect,and both could significantly reduce the friction coefficient and wear rate of CSW single filled PTFE composite;The wear mechanism of PTFE composites gradually changed from adhesive wear to slight abrasive wear with the increase of nano-Al_(2)O_(3) mass fraction.

关 键 词：纳米Al_(2)O_(3) CSW 协同效应 PTFE 摩擦学性能 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]