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Surface Modification of the Polyimide Films by Electrical Discharges in Water
Author(s) -
Miron Camelia,
Sava Ion,
Jepu Ionut,
Osiceanu Petre,
Lungu Cristian Petrica,
Sacarescu Liviu,
Harabagiu Valeria
Publication year - 2013
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201300015
Subject(s) - polyimide , contact angle , x ray photoelectron spectroscopy , materials science , dissociation (chemistry) , polymer , surface modification , distilled water , fourier transform infrared spectroscopy , plasma , analytical chemistry (journal) , self ionization of water , chemical engineering , polymer chemistry , composite material , chemistry , organic chemistry , chromatography , physics , layer (electronics) , quantum mechanics , engineering
Pulsed electrical discharges in distilled water were used for the surface modifications of the aromatic polyimides. Optical emission spectroscopy has shown the formation of excited species in the plasma due to water dissociation and ionization. The reactive species have induced surface modifications of the polymer films which were investigated by FTIR, AFM, XPS, and static contact angle measurements. The surface hydrophobicity of the polyimide films increased with the plasma treatment time due to the segregation of the CF 3 groups at the polymer surface and the imidization of the polyimides during the plasma discharge.