Polyimide-based composite coatings for simultaneously enhanced mechanical and tribological properties by polyhedral oligomeric silsesquioxane

被引：13

作者：

Yu, Chuanyong ^{[1
]}

Liao, Yuwen ^{[1
]}

Zhang, Peng ^{[1
,2
]}

Li, Bin ^{[3
]}

Li, Shuangjian ^{[1
,2
]}

Wang, Qiwei ^{[1
,2
]}

Li, Wei ^{[1
,2
]}

机构：

[1] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China

[2] Jinan Univ, Shaoguan Res Inst, Shaoguan 512027, Peoples R China

[3] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2022年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Polyimide; Polyhedral oligomeric silsesquioxane; Lubrication coating; Mechanical properties; Organic-inorganic hybrid; SURFACE-PROPERTIES; POSS; NANOCOMPOSITES; WEAR; FILM; TRIBOCHEMISTRY; PERFORMANCE; BEHAVIORS;

D O I：

10.1016/j.triboint.2022.107521

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The increasingly harsh service condition of lubricating coatings presents a more pressing demand for improving performance. Herein, octa-amino polyhedral oligomeric silsesquioxane (POSS) were covalently grafted onto polyimide (PI) matrix. The effect of POSS on the mechanical properties of the PI-based composite coatings and the tribological properties of PI/PTFE based lubricating coatings before and after modification were investigated. As expected, compared with the pure PI, the POSS-PI nano-materials exhibited 31.6% and 32.7% enhancements in tensile strength and nano-hardness without discernable decrease in breaking elongation. Additionally, the wear rate significantly decreased by 54.9% with the addition of OPOSS. The enhancement of wear resistance could be attributed to the improved cohesion strength and load-bearing capacity of the PI/PTFE composite coating reinforced by POSS.

引用

页数：13

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