Hydrophobic–Hydrophilic Properties and Characterization of PIM-1 Films Treated by Elemental Fluorine in Liquid Perfluorodecalin; Polymers; Vol. 14, iss. 23

Hydrophobic–Hydrophilic Properties and Characterization of PIM-1 Films Treated by Elemental Fluorine in Liquid Perfluorodecalin; Polymers; Vol. 14, iss. 23

Bibliografiske detaljer
Parent link:Polymers.— .— Basel: MDPI
Vol. 14, iss. 23.— 2022.— Article number 5152, 14 p.
Institution som forfatter: Томский политехнический университет
Andre forfattere: Belov N. A. Nikolay Alexandrovich, Alentjev (Alentiev) A. Yu. Aleksandr Yurjevich, Pashkevich D. S. Dmitry Stanislavovich, Voroshilov F. A. Fedor Anatolievich, Dvilis E. S. Edgar Sergeevich, Nikiforov R. Y. Roman, Chirkov S. V. Sergey, Syrtsova D. A. Daria, Kostina Ju. V. Julia, Asanov I. P. Igor, Bogdanova Yu. G. Yulia
Summary:Title screen
A direct fluorination technique was applied for the surface treatment of PIM-1 films in a liquid phase (perfluorodecalin). The fluorinated samples were analyzed by various instrumental techniques. ATR-IR spectroscopy showed that the fluorination predominantly takes place in methylene- and methyl-groups. Cyano-groups, aromatic hydrogens and the aromatic structure of the PIM-1 repeat unit were shown to be relatively stable at the fluorination conditions. XPS confirmed that the concentration of fluorine, as well as oxygen, in the near surface layer (~1 nm) increases with fluorination time. C1s and O1s surface spectra of the fluorinated PIM-1 samples indicated an appearance of newly-formed C-F and C-O functional groups. Scanning electron microscopy and X-ray energy-dispersive spectroscopy of the fluorinated PIM-1 samples showed an increase of the fluorine concentration at the surface (~0.1–1 µm) with the treatment duration. Analysis of the slices of the PIM-1 films demonstrated a decline of the fluorine content within several microns of the film depth. The decline increased with the fluorination time. A model of fluorine concentration dependence on the film depth and treatment duration was suggested. A change in the specific free surface energy as a result of PIM-1 fluorination was revealed. The fluorination time was shown to affect the surface energy (γSV), providing its shift from a low value (25 mJ·m−2 ), corresponding to tetrafluoroethylene, up to a relatively high value, corresponding to a hydrophilic surface
Текстовый файл
Sprog:engelsk
Udgivet: 2022
Fag:
электронный ресурс
труды учёных ТПУ
direct surface liquid-phase fluorination
PIM-1
SEM
XEDS
XPS
ATR-IR
contact angle; surface energy
Online adgang:https://doi.org/10.3390/polym14235152
Format: Electronisk Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=671882

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