Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer
The fluorination of the polymer polyethylene terephthalate in plasma created from SF6 or CF4 gas at various pressures was investigated. The surface was analysed by X-ray photoelectron spectroscopy and water contact angle measurements, whereas the plasma was characterized by optical emission spectros...
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doaj-d41f9eab2f704db08797556ff9f6e1362020-11-24T23:16:17ZengMDPI AGMaterials1996-19442018-02-0111231110.3390/ma11020311ma11020311Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET PolymerMatic Resnik0Rok Zaplotnik1Miran Mozetic2Alenka Vesel3Jozef Stefan International Postgraduate School, Jamova 39, Ljubljana 1000, SloveniaJozef Stefan Institute, Jamova 39, Ljubljana 1000, SloveniaJozef Stefan Institute, Jamova 39, Ljubljana 1000, SloveniaJozef Stefan Institute, Jamova 39, Ljubljana 1000, SloveniaThe fluorination of the polymer polyethylene terephthalate in plasma created from SF6 or CF4 gas at various pressures was investigated. The surface was analysed by X-ray photoelectron spectroscopy and water contact angle measurements, whereas the plasma was characterized by optical emission spectroscopy. The extent of the polymer surface fluorination was dependent on the pressure. Up to a threshold pressure, the amount of fluorine on the polymer surface and the surface hydrophobicity were similar, which was explained by the full dissociation of the SF6 and CF4 gases, leading to high concentrations of fluorine radicals in the plasma and thus causing the saturation of the polymer surface with fluorine functional groups. Above the threshold pressure, the amount of fluorine on the polymer surface significantly decreased, whereas the oxygen concentration increased, leading to the formation of the hydrophilic surface. This effect, which was more pronounced for the SF6 plasma, was explained by the electronegativity of both gases.http://www.mdpi.com/1996-1944/11/2/311sulphur hexafluoride (SF6) plasmatetrafluoromethane (CF4) plasmapolymer polyethylene terephthalate (PET)surface modificationfunctionalization and wettabilityoptical emission spectroscopy (OES)electronegativity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Matic Resnik Rok Zaplotnik Miran Mozetic Alenka Vesel |
spellingShingle |
Matic Resnik Rok Zaplotnik Miran Mozetic Alenka Vesel Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer Materials sulphur hexafluoride (SF6) plasma tetrafluoromethane (CF4) plasma polymer polyethylene terephthalate (PET) surface modification functionalization and wettability optical emission spectroscopy (OES) electronegativity |
author_facet |
Matic Resnik Rok Zaplotnik Miran Mozetic Alenka Vesel |
author_sort |
Matic Resnik |
title |
Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer |
title_short |
Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer |
title_full |
Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer |
title_fullStr |
Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer |
title_full_unstemmed |
Comparison of SF6 and CF4 Plasma Treatment for Surface Hydrophobization of PET Polymer |
title_sort |
comparison of sf6 and cf4 plasma treatment for surface hydrophobization of pet polymer |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-02-01 |
description |
The fluorination of the polymer polyethylene terephthalate in plasma created from SF6 or CF4 gas at various pressures was investigated. The surface was analysed by X-ray photoelectron spectroscopy and water contact angle measurements, whereas the plasma was characterized by optical emission spectroscopy. The extent of the polymer surface fluorination was dependent on the pressure. Up to a threshold pressure, the amount of fluorine on the polymer surface and the surface hydrophobicity were similar, which was explained by the full dissociation of the SF6 and CF4 gases, leading to high concentrations of fluorine radicals in the plasma and thus causing the saturation of the polymer surface with fluorine functional groups. Above the threshold pressure, the amount of fluorine on the polymer surface significantly decreased, whereas the oxygen concentration increased, leading to the formation of the hydrophilic surface. This effect, which was more pronounced for the SF6 plasma, was explained by the electronegativity of both gases. |
topic |
sulphur hexafluoride (SF6) plasma tetrafluoromethane (CF4) plasma polymer polyethylene terephthalate (PET) surface modification functionalization and wettability optical emission spectroscopy (OES) electronegativity |
url |
http://www.mdpi.com/1996-1944/11/2/311 |
work_keys_str_mv |
AT maticresnik comparisonofsf6andcf4plasmatreatmentforsurfacehydrophobizationofpetpolymer AT rokzaplotnik comparisonofsf6andcf4plasmatreatmentforsurfacehydrophobizationofpetpolymer AT miranmozetic comparisonofsf6andcf4plasmatreatmentforsurfacehydrophobizationofpetpolymer AT alenkavesel comparisonofsf6andcf4plasmatreatmentforsurfacehydrophobizationofpetpolymer |
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1725587768360304640 |