The Effect of an Absorbed Polyelectrolyte Layer on the Dynamic Mobility of a Colloidal Particle

Comparative Study of the Solid–Liquid Interface Behavior of Amphiphilic Block and Block‐Like Copolymers

“…[9,[13][14][15][16][17][18][19] The desired information is derived from the dynamic mobility (m D ) of the dispersed particle. m D represents the electrophoretic mobility of a particle in an alternating electric field.…”

“…Electrokinetic sonic amplitude (ESA) measurements were shown to be a powerful method for studying polymer-particle interactions, since it provides insights into the process of polymer adsorption onto solid particles. [9,[13][14][15][16][17][18][19] The desired information is derived from the dynamic mobility (m D ) of the dispersed particle. m D represents the electrophoretic mobility of a particle in an alternating electric field.…”

Electrophoretic mobility of poly(acrylic acid)-coated alumina particles

“…The electrical properties of polymer-coated particles are critical to such processes [6], and their electrokinetic behavior has been studied extensively [7][8][9][10][11][12][13][14]. While non-ionic polymers adsorbed on charged particle surfaces simply shift the hydrodynamic slip plane outward, reducing the surface charge at the slip plane and correspondingly the electrophoretic mobility [7,8,10], the case of particles coated with polyelectrolytes is more complicated, as both the particle surfaces and the polyelectrolyte carry charge [9,15,16]. Experimental [13,14,17] and theoretical [9,15,18] studies have addressed the issue, particularly for the case of neutral polymers or of polyelectrolytes of charge opposite to that of the particle surface.…”

“…Electrophoretic mobility measurements, both dc and acoustic, provide convenient means of estimating the electrical properties of colloidal particles, and are used in the current study to assess the collective effects of the addition of poly (acrylic acid) to alumina dispersions. In the case of polymer-coated particles, such measurements can provide insights into many important colloidal properties, such as polymer adlayer thickness [8], the change in net surface charge by polyelectrolyte adsorption and the apparent shift in the slip plane by the polymer adlayer [10,12,16,22]. The objective of this study is to use both steady static (dc) and dynamic (acoustic) electrophoretic mobility measurements to probe the effects of poly (acrylic acid) adsorption on the electrical properties of colloidal alumina particles under a variety of conditions relevant to nuclear waste processing.…”

Surface Modification in Aqueous Dispersions with Thermo-Responsive Poly(methylvinylether) Copolymers in Combination with Ultrasonic Treatment

“…Detailed information about the interaction of copolymers with the pigment surface, e.g., adsorption/ desorption phenomena as reflected from the dynamic mobility µ D of the dispersed particle, can be obtained by applying the Electrokinetic Sonic Amplitude (ESA) technique [10][11][12][13][14][15][16][17]. With this method, a potential is measured from pressure waves generated by the movement of charged particles in an oscillating electric field.…”