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.
| Original language | English |
|---|---|
| Pages (from-to) | 480-494 |
| Journal | Journal of applied polymer science |
| Volume | 75 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2000 |
Keywords
- METIS-106558
- IR-71630
- chemical composition
- treatment stability
- Surface modification
- PET nonwoven
- X-ray photoelectron spectroscopy
- Leukocyte filters
- Gas plasma treatment