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Improvement of hydrophilicity of polymer surface by surface‐wave excited Ar plasma with acetic acid
Author(s) -
Anzawa Eiki,
Kral Martin,
Ogino Akihisa,
Nagatsu Masaaki
Publication year - 2011
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.21137
Subject(s) - x ray photoelectron spectroscopy , contact angle , surface roughness , polymer , polycarbonate , materials science , surface modification , acetic acid , argon , plasma , analytical chemistry (journal) , chemical engineering , molecule , plasma cleaning , chemistry , composite material , organic chemistry , physics , quantum mechanics , engineering
Plasma surface treatment has many advantages over other wet techniques. In this work, we focused on surface modification by introducing ‐COOH groups onto the polymer surface by means of surface‐wave plasma. To introduce ‐COOH groups onto the surface, we added a small amount of acetic acid (CH 3 COOH) vapor to the argon plasma. The water contact angle on the polycarbonate surface decreased from 70° to 0° after plasma treatment. Atomic force microscopy (AFM) and X‐ray photoelectron spectroscopy (XPS) measurements revealed that the surface roughness increased and oxygen molecules were introduced. These results suggest that functional groups on the polymer surface were replaced by highly hydrophilic groups as a result of Ar + CH 3 COOH plasma treatment. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 176(4): 1–6, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21137