Surface modification induced on poly(ethylene terephthalate) (PET) fibers by cold SF6 plasma treatment has been investigated systematically as a function of plasma device parameters. The observed wettability modifications of fibers plasma-treated under different operating conditions were correlated to their dyeability modifications and to the changes in surface chemical composition, determined by X-ray Photoelectron Spectroscopy (XPS), and topography, investigated by atomic force microscopy (AFM). Optical emission spectra from the SF6 plasma at different pressures gave information on its content of fluorine atoms. A striking transition was observed between the increased hydrophilicity and high dyeability, imparted by plasma treatment at low pressure (<0.2 mbar), mainly as a consequence of surface etching and surface activation, and the increased hydrophobicity, imparted by plasma treatment in the higher pressure regime (0.2-0.4 mbar), consequent to extended surface fluorination.
Wettability and dyeability modulation of poly(ethylene terephthalate) fibers through cold SF6 plasma treatment / R. Barni, C. Riccardi, E. Selli, M.R. Massafra, B. Marcandalli, F. Orsini, G. Poletti, L. Meda. - In: PLASMA PROCESSES AND POLYMERS. - ISSN 1612-8850. - 2:1(2005), pp. 64-72.
Wettability and dyeability modulation of poly(ethylene terephthalate) fibers through cold SF6 plasma treatment
E. Selli;F. Orsini;G. PolettiPenultimo
;
2005
Abstract
Surface modification induced on poly(ethylene terephthalate) (PET) fibers by cold SF6 plasma treatment has been investigated systematically as a function of plasma device parameters. The observed wettability modifications of fibers plasma-treated under different operating conditions were correlated to their dyeability modifications and to the changes in surface chemical composition, determined by X-ray Photoelectron Spectroscopy (XPS), and topography, investigated by atomic force microscopy (AFM). Optical emission spectra from the SF6 plasma at different pressures gave information on its content of fluorine atoms. A striking transition was observed between the increased hydrophilicity and high dyeability, imparted by plasma treatment at low pressure (<0.2 mbar), mainly as a consequence of surface etching and surface activation, and the increased hydrophobicity, imparted by plasma treatment in the higher pressure regime (0.2-0.4 mbar), consequent to extended surface fluorination.Pubblicazioni consigliate
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