Surface modification of polytetrafluoroethylene film using single liquid electrode atmospheric- pressure glow discharge

doi:10.1088/1674-1056/20/6/065206

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.

Keywords: single liquid electrode atmospheric pressure glow discharge wettability ageing effect

Received: 15 October 2010
Revised: 18 February 2011
Accepted manuscript online:

PACS:	52.77.Bn	(Etching and cleaning)
	68.08.Bc	(Wetting)
	82.35.Gh	(Polymers on surfaces; adhesion)

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).

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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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Surface modification of polytetrafluoroethylene film using single liquid electrode atmospheric- pressure glow discharge

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