Electrokinetic Characterization of Poly(N-isopropylacrylamide) Microgel Particles: Effect of Electrolyte Concentration and Temperature

Use of Environmental Scanning Electron Microscopy to image poly(N-isopropylacrylamide) microgel particles

“…This paper continues a previous work made in our group [33][34][35] regarding the synthesis, characterization, swelling, stability, etc. studies on ionic poly-NIPAM microgels.…”

Theory of electrostatics and electrokinetics of soft particles

“…The above electrophoresis theory of soft particles has been applied to analyze the electrophoretic mobility data of biological colloids such as cells and their model particles [24][25][26][27][28][29][30][31][32][33][34][35]. Ohshima [36,37] proposed a theory of electrophoresis of soft particles in concentrated suspensions.…”

Colloidal Stability of a Temperature-Sensitive Poly(N-isopropylacrylamide/2-acrylamido-2-methylpropanesulphonic acid) Microgel

“…No pH dependence was detected (9). The dependence with the other variables was theoretically justified by using Ohshima's theory for soft particles (11), taking into account a variable charge density and a step function for the drag coefficient (10).…”

“…Before the stability studies, a complete characterization regarding size changes and electrophoretic behavior was carried out (9,10). Here we give a summary of the main findings.…”

“…From this result, if the total charge is assumed to be uniformly distributed in the shell, the particle charge density can be calculated for each particle size (9).…”