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SynopsisNylon fabrics were treated by low temperature fluorocarbon plasmas. All of the fluorocarbon plasmas applied altered the surface of nylon fabrics to be hydrophobic and water-repellent. The durability of hydrophobicity and water repellency was examined by measurements of the water contact angle, the water droplet rolling-off angle, and the breakthrough water pressure after plasma-treated fabrics were washed. I t was found that the structure of starting fluorocarbon and the plasma energy input were important factors in the durability. After washing, surface dynamics were investigated on different drying conditions. It was found that chemical composition and water repellency were dependent on drying conditions because of rotation of hydrophobic segments on the surface of fabrics.

SYNOPSISThe glow discharge of a series of saturated fluorocarbons, CnF2n+2 ( n = 1, 2, 4, 6, and 8), was studied with glass substrates which do not contain any hydrogen. It was found that the deposition rate was a function of the F/C ratio of the starting fluorocarbons. That is, fluorocarbons with higher F/C ratio, such as CF, and C2Fs, hardly polymerized, while fluorocarbons with lower F / C ratio, such as C8FI8, polymerized as well as C2F4. After plasma exposure, the surface of glass substrate was characterized by measurements of water contact angle, water droplet rolling-off angle, and ESCA. Although all saturated fluorocarbon plasmas could alter the surface more hydrophobic than before, the deposited materials from fluorocarbons with higher F/C were not stable. Also, in plasmas with high F/C fluorocarbons, i.e., CF4 and C2Fs, sputtering of the electrode material was observed. 0 1992

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