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Article type: Research Article
Authors: Khang, Gilson | Lee, Hai Bang | Park, Joon B.;
Affiliations: Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA | Biomaterials Lahoratory, Korea Research Institutes of Chemical Technology, P.O. Box 107, Yusung, Taejon, 305-606, Korea
Note: [] Author to whom correspondence should be addressed.
Abstract: Surface treatments by nonionic surfactant (Brij®) coating and air-plasma glow discharge treatment onto polysulfone have been investigated to improve its surface properties. Surface treated samples were characterized by measurement of contact angle by a goniometer, Fourier transform infrared spectroscopy in the attenuated total reflectance mode (FTIR-ATR), and electron spectroscopy for chemical analysis (ESCA). The contact angles of the nonionic surfactant coated films decreased from 66.6 ± 2.1° to nearly 0° due to hydrophilic polyethylene oxide (PEO) chain segment of the nonionic surfactant, and those of air-plasma treated films also decreased from 66.6° to about 22° with a treatment time of less than 5 s. ESCA analysis of air-plasma treated films indicates the incorporation of oxygen molecules onto polysulfone surface lowers the water contact angle. These modified techniques can be used to prevent platelet adhesion onto polysulfone surfaces.
Keywords: surface modification, polysulfone, nonionic surfactant, air-plasma treatment, water contact angle, FTIR-ATR, ESCA
DOI: 10.3233/BME-1995-5405
Journal: Bio-Medical Materials and Engineering, vol. 5, no. 4, pp. 245-258, 1995
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