Treatment of PET nonwoven with a water vapor or carbon dioxide plasma


Klomp, A.J.A. and Terlingen, J.G.A. and Takens, G.A.J. and Strikker, A. and Engbers, G.H.M. and Feijen, J. (2000) Treatment of PET nonwoven with a water vapor or carbon dioxide plasma. Journal of Applied Polymer Science, 75 (4). pp. 480-494. ISSN 0021-8995

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Abstract:Gas plasma treatment of poly(ethylene terephthalate) nonwoven (NW-PET) was used to increase the hydrophilicity of single- and multilayer NW-PET. NW-PET was treated with a pulsatile CO2 or with a pulsatile H2O glow discharge. X-ray photoelectron spectroscopy (XPS) showed significantly more oxygen with CO2 glow-discharge-treated NW-PET than with H2O glow-discharge-treated-NW-PET surfaces. Moreover, the introduction rate of oxygen at a single layer of NW-PET was higher for a CO2 than for a H2O glow-discharge treatment. Titration data revealed significantly higher surface concentrations of carboxylic groups for CO2 glow-discharge NW-PET than for H2O glow-discharge-treated NW-PET. Mass spectrometry analysis revealed that the entire internal surface of a single layer of NW-PET was modified. XPS and contact measurements confirmed the modification of the internal surface of multilayers of NW-PET. H2O and CO2 glow-discharge-treated substrates consisting of six layers of NW-PET had a nonuniform surface concentration of carboxylic acid groups as determined with titration experiments. The outside layers of the substrate contained a higher surface concentration of carboxylic acid groups than did the inside layers. XPS analysis and titration data showed that the rinsing of H2O and CO2 glow-discharge-treated NW-PET with water changed the surface composition considerably. Part of the carboxylic acid group-containing species were washed off.
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Copyright:© 2000 Wiley InterScience
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