[Table of Contents]

Plasma and Fusion Research

Volume 6, 2406043 (2011)

Regular Articles

Anti-bacterial Property of Hydrogen-ion and Oxygen-ion Treated Polytetrafluoroethylene (PTFE) Materials
Hernando S. SALAPARE III, Gene Q. BLANTOCAS1), Windell L. RIVERA2,3), Vanissa A. ONG2,3), Ralph S. HIPOLITO2,3) and Henry J. RAMOS
Plasma Physics Laboratory, National Institute of Physics, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines
1)
Department of Electrical Engineering, College of Engineering, Qassim University, Buraydah 51452, Kingdom of Saudi Arabia
2)
Molecular Protozoology Laboratory, Natural Sciences Research Institute, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines
3)
Institute of Biology, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines
(Received 19 November 2010 / Accepted 15 March 2011 / Published 12 July 2011)

Abstract

The anti-bacterial property of hydrogen-ion and oxygen-ion treated polytetrafluoroethylene (PTFE) materials is determined using contact angle measurements, scanning electron microscopy (SEM), and Escherichia coli (E. coli) adhesion tests. PTFE samples are irradiated using a gas discharge ion source (GDIS). Ion energies are varied by changing the plasma discharge current (Id). Results show that both the hydrogen and oxygen plasma treatments modify the PTFE surface in morphology. Both treatments exhibited changes in the wettability of the samples at different Id, Hydrogen treatment shows that lower Id improved material hydrophobicity and higher Id resulted in enhanced hydrophilicity, while oxygen treatment shows that as the Id increases, PTFE becomes more hydrophilic. The hydrogen and the oxygen treated PTFE exhibited a reduced E. coli attachment on the samples. Oxygen treatment exhibited a lower E. coli adhesion as compared to using hydrogen.

Keywords

polytetrafluoroethylene, gas discharge ion source, oxygen plasma, hydrogen plasma, Escherichia coli, bacterial adhesion

DOI: 10.1585/pfr.6.2406043

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This paper may be cited as follows:

Hernando S. SALAPARE III, Gene Q. BLANTOCAS, Windell L. RIVERA, Vanissa A. ONG, Ralph S. HIPOLITO and Henry J. RAMOS, Plasma Fusion Res. 6, 2406043 (2011).