Silk samples treated in an appositely set-up radio frequency SF6 plasma reactor under different operation conditions, were characterized by XPS, EPR, DSC, XRD, and ATR analyses and water contact angle measurements, and also as a function of storage time after the treatment. Efficient attachment of F atoms on the polymer surface occurred during the plasma treatment, imparting water repellency to it. Also the percentage of surface oxygen increased after the treatment, partially as a consequence of radical scavenging by mol. oxygen and the formation of peroxides. An increase in silk crystallinity during the treatment seems to contribute to ensuring durable water repellency properties.
Surface modifications of silk by cold SF6 plasma treatment / E. Selli, C. Riccardi, M. Massafra, B. Marcandalli. - In: MACROMOLECULAR CHEMISTRY AND PHYSICS. - ISSN 1022-1352. - 202:9(2001), pp. 1672-1678.
Surface modifications of silk by cold SF6 plasma treatment
E. SelliPrimo
;
2001
Abstract
Silk samples treated in an appositely set-up radio frequency SF6 plasma reactor under different operation conditions, were characterized by XPS, EPR, DSC, XRD, and ATR analyses and water contact angle measurements, and also as a function of storage time after the treatment. Efficient attachment of F atoms on the polymer surface occurred during the plasma treatment, imparting water repellency to it. Also the percentage of surface oxygen increased after the treatment, partially as a consequence of radical scavenging by mol. oxygen and the formation of peroxides. An increase in silk crystallinity during the treatment seems to contribute to ensuring durable water repellency properties.
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