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Plasma-modified PTFE for biological applications: Correlation between protein-resistant properties and surface characteristics

par Vandencasteele, Nicolas ;Nisol, Bernard ;Viville, Pascal;Lazzaroni, Roberto;Castner, David D.G.;Reniers, François
Référence Plasma processes and polymers, 5, 7, page (661-671)
Publication Publié, 2008-09

Article révisé par les pairs

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Résumé :

PTFE samples were treated by low-pressure O2 RF plasmas. The adsorption of BSA was used as a probe for the protein-resistant properties. Exposure of PTFE to an O2 plasma leads to an increase in chamber pressure. OES reveals the presence of CO, CO2 and F in the gas phase, indicating a strong etching of the PTFE surface by the plasma. Furthermore, the high-resolution C1s spectra show CF3, CF and C-CF components. WCA as high as 160° were observed, indicating a super-hydrophobic behavior. AFM images of surfaces treated at high plasma power showed an increase in roughness. Lower amounts of BSA adsorption were detected on high power, O2 plasma-modified PTFE samples compared to low power, oxygen plasma-modified ones. A graph is presented. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.