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HERO ID
3860683
Reference Type
Journal Article
Title
Film Conformation and Dynamic Properties of Atomistically Architectured Perfluoropolyethers on the Carbon Overcoated Surfaces
Author(s)
Chung, PilS; Jhon, MS
Year
2015
Is Peer Reviewed?
Yes
Journal
I E E E Transactions on Magnetics
ISSN:
0018-9464
Volume
51
Issue
11
DOI
10.1109/TMAG.2015.2436903
Web of Science Id
WOS:000364770500290
Abstract
To improve chemical and thermal stability under harsh conditions, conventional linear perfluoropolyether (PFPE) lubricants with chain-like structures need to be molecularly modified. We investigated the molecular conformations and dynamic properties of star-like PFPEs (i.e., TA-30 and QA-40) chosen as a candidate lubricant material for the heat-assisted magnetic recording system and compared those results to the other molecularly architectured PFPEs (i.e., Zdol, Ztetraol, and ZTMD) via multiscale modeling methodology. Due to the improved adhesion of the extra arms to the surface, star-like PFPEs exhibit excellent thermal stability, while additional functional groups cause agglomeration by drastically decreasing mobility on the carbon overcoat. The effect of PFPE molecular structures on the static and dynamic responses examined here could provide the molecular design criteria for the advanced head-disk interface design.
Keywords
Head-disk interface (HDI); lubricant film; molecular dynamics (MD); perfluoropolyether (PFPE); star-like PFPE
Tags
PFAS
•
Expanded PFAS SEM (formerly PFAS 430)
Perfluoropentanesulfonate
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFPeS (2706-91-4)
Literature Search
WOS
•
PFPeS
Literature Search
WOS
Screening Results
Excluded/Not on Topic
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