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Surface structure and inert surface characteristics of perfluorodecanoic acid‐grafted polyurethane
Author(s) -
Han Dong Keun,
Jeong Seo Young,
Kim Young Ha,
Min Byoung Goo
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070470502
Subject(s) - attenuated total reflection , fourier transform infrared spectroscopy , polyurethane , surface energy , surface modification , chemistry , contact angle , materials science , surface tension , infrared spectroscopy , inert , spectroscopy , fluorocarbon , polymer chemistry , analytical chemistry (journal) , chemical engineering , organic chemistry , composite material , physics , quantum mechanics , engineering
The surface compositions and characteristics of perfluorodecanoic acid (PFDA)‐grafted polyurethane (PU) were investigated to understand its enhanced blood compatibility. The grafting of PFDA was identified by attenuated total reflectance–Fourier transform infrared (ATR–FTIR). The results from angular‐dependent electron spectroscopy for chemical analysis (ADESCA) demonstrated the fluorocarbon enrichment at the outermost layer in PFDA‐grafted PU. Static secondary ion mass spectroscopy (SIMS) experiments supported the results drawn from ATR–FTIR and ADESCA data about the surface compositions. Energy‐dispersive X‐ray analysis (EDXA) data by fluorine mapping also indicated a considerable coverage with fluoroalkyl groups on the PU–PFDA surface. The critical surface tension, γ c , of the highly hydrophobic PU–PFDA surface revealed an extremely low value of 6.9 dyn/cm due to the optimal orientation of CF 3 groups to the uppermost surface. Therefore, such an inert low‐energy surface may contribute to improve blood compatibility of PFDA‐grafted PU. © 1993 John Wiley & Sons, Inc.