Abstract
The zeta-potential of fluorinated, chlorinated, brominated and untreated polypropylene fibers (PP) in buffer solutions [at pH 7.0 and 4.1] and in Methylene Blue aqueous solutions [at pH 4.1 and various dye concentrations] was measured at 25°C by the streaming potential method. In the buffer solutions, the fluorinated PP showed much more negative zeta-potential than those of chlorinated, brominated and untreated PP. In the basic dye aqueous solutions, the zeta-potential of the fluorinated PP has a tendency to increase positive zeta-potential than the others. Consequently, it was suggested that the fluorinated PP has a large affinity for organic cations, such as Methylene Blue, having the ability to interact with the fiber surface by van der waals and higher negative charge.
