Tribological behavior of PEEK composites filled with various surface modified whiskers
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摘要: 利用溶膠-凝膠(sol-gel)、氟表面活性劑(FSO)和鈦酸酯偶聯劑(NDZ-102)等對鈦酸鉀晶須(PTW)進行了表面改性,對比了改性后水接觸角的變化,考察了干摩擦條件下PTW改性對聚醚醚酮(PEEK)復合材料摩擦磨損性能的影響.利用SEM和光學顯微鏡觀察了磨損面和對偶面轉移膜形貌,并分析了其磨損機理.實驗結果表明:改性后PTW的水接觸角均有不同程度的提高,FSO改性得最高;改性后PEEK復合材料的摩擦因數均降低,在各載荷下FSO和溶膠-凝膠改性PTW后PEEK復合材料耐磨性明顯優于未改性的,300N載荷下較未改性的分別提高2.64和2.11倍;但是NDZ-102改性卻降低了復合材料的耐磨性.Abstract: Modification of potassium titanate whiskers (PTW) by sol-gel, FSO and NDZ-102 methods was studied. The water contact angle of modified PTW and the friction and wear properties of PEEK composites filled with various modified PTW were investigated. The worn surfaces and transfer films were observed by SEM and optical microscope, and the abrasion mechanism of PEEK composites filled with modified PTW was discussed. The results show that the water contact angle of PTW is improved after surface modification, and the highest is FSO modification. The friction coefficient of PEEK composites filled with modified PTW decreases, and the wear resistances of PEEK composites filled with FSO and sol-gel modified PTW are better than that without modification, which increases the wear resistance 2.64 and 2.11 times respectively under 300 N. But NDZ-102 decreases the wear resistance of PEEK composites.
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Key words:
- PEEK /
- potassium titanate whisker /
- surface modification /
- friction and wear /
- sol-gel
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