PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Surface modification of polytetrafluoroethylene film using single liquid electrode atmospheric- pressure glow discharge |
Zhou Lan(周澜)a)†, Lü Guo-Hua(吕国华)a), Chen Wei(陈维) a), Pang Hua(庞华)a), Zhang Gu-Ling(张谷令) b), and Yang Si-Ze(杨思泽)a)c) |
a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; b College of Science, Minzu University of China, Beijing 100191, China; c Fujian Key Laboratory for Plasma and Magnetic Resonance, Department of Aeronautics, School of Physics and Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China
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Abstract Polytetrafluoroethylene films are treated by room temperature helium atmospheric pressure plasma plumes, which are generated with a home-made single liquid electrode plasma device. After plasma treatment, the water contact angle of polytetrafluoroethylene film drops from 114° to 46° and the surface free energy increases from 22.0 mJ/m2 to 59.1 mJ/m2. The optical emission spectrum indicates that there are reactive species such as O2+, O and He in the plasma plume. After plasma treatment, a highly crosslinking structure is formed on the film surface and the oxygen element is incorporated into the film surface in the forms of -C-O-C-, -C=O, and -O-C=O groups. Over a period of 10 days, the contact angle of the treated film is recovered by only about 10°, which indicates that the plasma surface modification is stable with time.
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Received: 15 October 2010
Revised: 18 February 2011
Accepted manuscript online:
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PACS:
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52.77.Bn
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(Etching and cleaning)
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68.08.Bc
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(Wetting)
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82.35.Gh
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(Polymers on surfaces; adhesion)
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Fund: Project supported by the State Key Program of National Natural Science Foundation of China (Grant No. 10735090) and the
Young Scientist Fund of the National Natural Science Foundation of China (Grant No. 11005151). |
Cite this article:
Zhou Lan(周澜), Lü Guo-Hua(吕国华), Chen Wei(陈维), Pang Hua(庞华), Zhang Gu-Ling(张谷令), and Yang Si-Ze(杨思泽) Surface modification of polytetrafluoroethylene film using single liquid electrode atmospheric- pressure glow discharge 2011 Chin. Phys. B 20 065206
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