Journal
APPLIED SURFACE SCIENCE
Volume 353, Issue -, Pages 873-881Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.07.025
Keywords
Surface modifications; Composites; Dynamic mechanical properties; Tribological properties
Categories
Funding
- National Natural Science Foundation of China [21176169]
- Shanxi Provincial Key Innovative Research Team in Science and Technology [2012041011]
- International Science & Technology Cooperation Program of China [2012DFR50460]
- Research Project Supported by Shanxi Scholarship Council of China [2012-038]
- Changjiang Scholar and Innovative Research Team in University [IRT0972]
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The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on the morphology, dynamic mechanical and tribological properties of multi-walled carbon nanotube/poly( ether ether ketone) (MWCNT/PEEK) composites have been investigated. MWCNTs were treated with mixed acids to obtain acid-functionalized MWCNTs. Then the acid-functionalized MWCNTs were modified with ethanolamine (named e-MWCNTs). The MWCNT/PEEK composites were prepared by a solution-blending method. A more homogeneous distribution of e-MWCNTs within the composites was found with scanning electron microscopy. Dynamic mechanical analysis demonstrated a clear increase in the storage modulus of e-MWCNT/PEEK composites because of the improved interfacial adhesion strength between e-MWCNTs and PEEK. Furthermore, the presence of e-MWCNTs caused an enhancement in the glass transition temperature of the composites. Wear tests have shown that the friction coefficient of eMWCNT/PEEK composites decreased significantly during the test after the running-in period. This suggests that there is an obvious improvement in tribological properties of e-MWCNT/PEEK composites. Overall, the e-MWCNT/PEEK composites have exhibited improved properties and are promising for their applications in industry. (C) 2015 Elsevier B.V. All rights reserved.
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