Effect of charge on the stabilization of water-in-water emulsions by thermosensitive bis-hydrophilic microgels
Résumé
Hypothesis Molecular surfactants are not able to stabilize water-in-water (W/W) emulsions, unlike nano or micro-particles, which can achieve this in some cases. However, the effect of electrostatic interactions between particles on the emulsion stability has rarely been investigated. We hypothesize that introducing charges modifies the stabilization capacity of particles and renders it both pH-and ionic strength-dependent. Experiments Charge was introduced into bis-hydrophilic and thermoresponsive dextran/polyNisopropylacrylamide microgels by replacing a small fraction of polyN-isopropylacrylamide with acrylic acid groups. The size of the microgels was obtained by dynamic light scattering. The stability and microstructure of dextran/poly(ethyleneoxide)-based W/W emulsions, was
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