Journal
PLASMA PROCESSES AND POLYMERS
Volume 12, Issue 10, Pages 1075-1084Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.201400216
Keywords
fluorination; hydrophilicity; plasma treatments; styrene-acrylonitrile copolymers; surface modifications
Funding
- Operational Program Research and Development for Innovations
- European Regional Development Fund (ERDF)
- national budget of Czech Republic, within the framework of project Centre of Polymer Systems [CZ.1.05/2.1.00/03.0111]
- Advanced Theoretical and Experimental Studies of Polymer Systems [CZ.1.07/2.3.00/20.0104]
- Slovenian Research Agency (ARRS) [P2-0082]
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A commercial formulation of styrene-acrylonitrile copolymer (SAN) sheets were surface-modified by using non-thermal radiofrequency and microwave plasma treatments. In order to evaluate the possible improvement of SAN surface properties, the modification was performed using oxygen and tetraflouromethane (CF4) discharges under different treatment durations and output powers. The untreated and treated samples were chemically and morphologically characterised by X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM), and surface charge was evaluated by zeta potential (zeta) measurements. In addition, water contact angle measurements were employed for evaluating the extent of hydrophilicity and hydrophobicity on the treated specimens. The overall outcome indicated drastic chemical and physical surface changes, which vary according to the carrier gas. Surface became noticeably hydrophilic after few seconds of oxygen plasma treatments, whilst the surface became hydrophobic after the CF4 treatments. The present approach might serve as a feasible and promising method to alter the surface properties of styrene-acrylonitrile copolymers.
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