Investigations on the stability of plasma modified silicone surfaces
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Data
2004-03-01
Autores
Rangel, E. C.
Gadioli, G. Z.
Cruz, N. C.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Kluwer Academic/plenum Publ
Resumo
In this work it was investigated the effect of the exposure to different plasmas on the wettability of silicone samples. We have observed that oxygen. argon, and hydrogen glow discharges are quite effective in reducing the water contact angle of such polymer. However, indifferently to efficiency of the treatment, practically all the modified surfaces recovered great part of their original hydrophobicity. We have investigated this hydrophobic recovery using surface energy measurements and theoretical simulations based on the exponential decay of the population of polar groups on the surface. According to our results such recovery can be attributed to the decrease of polar species at the interface water-polymer surface.
Descrição
Palavras-chave
plasma treatment, surface modification, wettability, surface energy
Como citar
Plasmas and Polymers. New York: Kluwer Academic/plenum Publ, v. 9, n. 1, p. 35-48, 2004.