Polyimide/mesoporous silica nanocomposites: Characterization of mechanical and thermal properties and tribochemistry in dry sliding condition
Access Status
Authors
Date
2016Type
Metadata
Show full item recordCitation
Source Title
ISSN
School
Collection
Abstract
Mesoporous silica (MPS) with tunable mesopore channels can be used to reinforce polymers and has great potential in tribological applications, which is rarely investigated by research community. In this study, comprehensive properties of polyimide (PI)/MPS nanocomposites were investigated. The results demonstrated a slightly decreased tensile strength but increased modulus, microhardness and thermal stability of the PI/MPS nanocomposites. In particular, tribological properties of PI/MPS nanocomposites as functions of MPS content, applied load and sliding speed were systematically investigated. The incorporation of 1.5 wt.% MPS increased the anti-wear resistance of PI by more than 14-fold while the coefficient of friction decreased by 27%. This was highly associated with the formation of high-quality transfer film on the bearing steel counterpart surface.Relevant tribochemistry was thoroughly revealed by X-ray photoelectron spectroscopy (XPS) analysis on the transfer film and Raman analysis on the worn surfaces. This study confirmed the high efficiency of using MPS to reinforce PI polymer for tribological applications and elaborated tribochemistry to further understand the tribochemical process in polymer-metal rubbing systems.
Related items
Showing items related by title, author, creator and subject.
-
Sharma, R.; Mahto, V.; Vuthaluru, Hari (2019)Application of Polymeric nanocomposites as pour point depressant (PPD) for crude oil has opened the doors for a new area of research in the petroleum industry. In this research work, a polymer nanocomposite Poly(methyl ...
-
Alamri, Hatem Rashed (2012)In recent years, cellulose fibre-reinforced polymer composites have been gaining a great attention in several engineering applications due to their desirable properties, which include low density, low cost, renewability ...
-
Ren, Y.; Zhao, Q.; Li, Xin Yong; Xiong, W.; Tade, Moses; Liu, Lihong (2014)A novel visible-light-activated photocatalyst consisting of porous graphitic C3N4 nanosheets and Ag3PO4 nanoparticles were synthesized through a tunable in situ deposition method. The morphology and microstructure of the ...