Fabrication of high-performance polytetrafluoroethylene microporous membranes filled with nano-alumina. (September 2019)

• Record Type: Journal Article
• Authors: Sun, Lewen; Zhu, Jufang; Che, Yanchao; Li, Qiuying; Guo, Weihong; Wu, Chifei
• Is Part Of: High performance polymers. Volume 31:Number 7(2019)
• Page Start: 843
• Page End: 851
• Publication Date: 2019-09
• Subjects: Polytetrafluoroethylene -- nano-alumina -- microporous membranes -- wear; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008318804034
• Languages: English
• ISSNs: 0954-0083

Abstract

In this article, polytetrafluoroethylene (PTFE) microporous membranes with excellent tensile strength and good wear durability were successfully fabricated by the addition of nano-alumina (Al2 O3 ). The friction and mechanical behavior of PTFE microporous membranes with different nano-Al2 O3 contents were investigated by Martindale abrasion tester, dynamic mechanical analysis, and universal testing machine. Scanning electron microscopy was applied to analyze the surface, longitudinal section, and worn surface of the microporous membranes. Results demonstrated that nano-Al2 O3 particles were dispersed into the "node" structures of PTFE microporous membranes and acted as the skeleton, leading to the increasing of the tensile strength remarkably. The wear rate reduced significantly with the addition of nano-Al2 O3 and was affected by nano-Al2 O3 content. Additionally, the wear mechanism of the microporous membranes was also discussed based on the study results.