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Micromachines 2014, 5(2), 263-274; doi:10.3390/mi5020263
Article

SU-8 Composite Based “Lube-tape” for a Wide Range of Tribological Applications

1,* , 1
 and
2
1 Department of Mechanical Engineering, National University of Singapore, 117576 Singapore 2 Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016, U.P, India
* Author to whom correspondence should be addressed.
Received: 21 March 2014 / Revised: 1 May 2014 / Accepted: 8 May 2014 / Published: 19 May 2014
(This article belongs to the Special Issue 15 Years of SU8 as MEMS Material)
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Abstract

In a previous work, we have developed a perflouropolyether (PFPE) lubricant droplet-filled SU-8 composite which promotes bonding between the molecules of SU-8 and PFPE and provides excellent boundary lubrication. The SU-8 + PFPE composite has enhanced the wear durability of SU-8 by more than four orders of magnitude. In this work, the same SU-8 + PFPE composite was used to fabricate a stand-alone laminate film called “Lube-tape”. It has integrated two layers of approximately 90 microns thickness each; the top layer is made of SU-8 + PFPE composite and the bottom layer of pristine SU-8. Thus, a single tape can have drastically contrasting high friction and low friction properties on its two surfaces. The composite side has the initial coefficient of friction ~7 times lower and the wear life more than four orders of magnitude than those of the pristine SU-8 side. This lube tape can be used on any load bearing surface to improve the tribological performance by simply pasting the pristine SU-8 side onto the substrate.
Keywords: SU-8; PFPE; composite; polymer tribology; Lube-tape; chemical bonding SU-8; PFPE; composite; polymer tribology; Lube-tape; chemical bonding
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Saravanan, P.; Satyanarayana, N.; Sinha, S.K. SU-8 Composite Based “Lube-tape” for a Wide Range of Tribological Applications. Micromachines 2014, 5, 263-274.

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