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Tribology Letters
Published in: Tribology Letters 3/2014

01-12-2014 | Original Paper

The Role of Functional End Groups of Perfluoropolyether (Z-dol and Z-03) Lubricants in Augmenting the Tribology of SU-8 Composites

Authors: Saravanan Prabakaran, Sundaramurthy Jayaraman, Duong Hai Minh, Sujeet K. Sinha

Published in: Tribology Letters | Issue 3/2014

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Abstract

In an earlier work, we demonstrated the development of SU-8 composites using perfluoropolyether (PFPE) as lubricant filler which reduced friction coefficient by ~7 times and enhanced wear life of SU-8 by more than four orders of magnitude. In this work, we have investigated the role of chemical bonding between SU-8 and PFPE molecules using two types of PFPE lubricants (i.e., Fomblin® Z-dol and Z-03) in improving the tribological properties of the composite. Z-dol has polar (–OH) end groups whereas Z-03 has non-polar (CF3) end groups. SU-8 with Z-dol (SU-8 + Z-dol) films yielded ~8 times greater wear life than SU-8 with Z-03 (SU-8 + Z-03) films and more by four orders of magnitude than pure SU-8. The nature of the films was analyzed in detail by chemical and physical characterization techniques like X-ray photoelectron spectroscopy, water contact angle and thermo-gravimetric analysis. The results validated the role of polar end functional group of Z-dol in covalent binding with SU-8 upon UV plasma treatment that resulted in improved tribological properties.
previous article Optimization of Surface Texturing for Contact Between Steel and Ultrahigh Molecular Weight Polyethylene Under Boundary Lubrication
next article Friction and Wear Behavior of AlMgB14–TiB2 Composite at Elevated Temperature

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Appendix
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Metadata
Title
The Role of Functional End Groups of Perfluoropolyether (Z-dol and Z-03) Lubricants in Augmenting the Tribology of SU-8 Composites
Authors
Saravanan Prabakaran
Sundaramurthy Jayaraman
Duong Hai Minh
Sujeet K. Sinha
Publication date
01-12-2014
Publisher
Springer US
Published in
Tribology Letters / Issue 3/2014
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-014-0419-8

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