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

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

1,* , 1
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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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) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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