Zeta Potential of fibrous substances is known to be closely related to the surface state of fibers and adsorption phenomena associated with various substances on the surface. The zeta potential of fibers has been evaluated by the flow potential method in research related to moisture absorption, swelling, dyeing, cleaning, and other applications. Previously, measurements of fibrous or filamentous samples by the electro-osmotic flow method posed difficulties because the samples tend to absorb water.
We mounted silk and cotton thread on a dedicated spacer and measured the zeta potential of each fiber in the acidic region from pH 2.5 to pH 5.8
