Defluorination of polytetrafluoroethylene surface by hydrogen plasma

Vesel, Alenka (avtor), Lojen, Dane (avtor), Zaplotnik, Rok (avtor), Primc, Gregor (avtor), Mozetič, Miran (avtor), Ekar, Jernej (avtor), Kovač, Janez (avtor), Gorjanc, Marija (avtor), Kurečič, Manja (avtor), Stana-Kleinschek, Karin (avtor)

Defluorination of polytetrafluoroethylene (PTFE) surface film is a suitable technique for tailoring its surface properties. The influence of discharge parameters on the surface chemistry was investigated systematically using radio-frequency inductively coupled H$_2$ plasma sustained in the E- and H-modes at various powers, pressures and treatment times. The surface finish was probed by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The measurements of water contact angles (WCA) showed increased wettability of the pristine PTFE; however, they did not reveal remarkable modification in the surface chemistry of the samples treated at various discharge parameters. By contrast, the combination of XPS and ToF-SIMS, however, revealed important differences in the surface chemistry between the E- and H-modes. A well-expressed minimum in the fluorine to carbon ratio F/C as low as 0.2 was observed at the treatment time as short as 1 s when plasma was in the H-mode. More gradual surface chemistry was observed when plasma was in the E-mode, and the minimal achievable F/C ratio was about 0.6. The results were explained by the synergistic effects of hydrogen atoms and vacuum ultraviolet radiation.

• Jezik: Angleški jezik
• Ključne besede: polytetrafluoroethylene, fluorine depletion, hydrogen plasma, VUV radiation, surface modification, hydrophilic
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 14 str.
• Številčenje: Vol. 12, iss. 12, art. 2855
• PID: 20.500.12556/RUL-134842
• UDK: 53
• ISSN pri članku: 2073-4360
• DOI: 10.3390/polym12122855
• COBISS.SI-ID: 39928579
• Datum objave v RUL: 04.02.2022

Gradivo je del revije

• Naslov: Polymers
• Skrajšan naslov: Polymers
• Založnik: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.12.2020

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J2-1728
• Naslov: Začetne stopnje površinske funkcionalizacije polimerov s plazemskimi radikali

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0082
• Naslov: Tankoplastne strukture in plazemsko inženirstvo površin