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Investigations on the Stability of Plasma Modified Silicone Surfaces
RANGEL, Elidiane C. - Personal Name
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 poly- mer. 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. Ac-cording to our results such recovery can be attributed to the decrease of polar species at the interface water–polymer surface.
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Elidiane C.Rangel ...[et all]
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