Ostwald ripening of comb polymer stabilised Ag salt nanoparticles
Rory Anderson, Richard Buscall, Robert Eldridge, Paul Mulvaney, Peter J Scales
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | ELSEVIER SCIENCE BV | Published : 2014
Ag salt nanoparticles were manufactured at high concentration in water in the presence of a series of copolymers of poly(ethylene glycol) and maleic anhydride (PEG-MA). The Ostwald ripening behaviour was then examined using the PEG chain length of the copolymer as a variable. The ripening rate was observed to be very slow compared to previous literature studies of bare or surfactant stabilised particles in dilute solution. Despite the hindrance to ripening caused by the presence of the adsorbed copolymer, the predicted rate was shown to fit closely to Lifshitz-Slyozov-Wagner (LSW) theory. Particle ripening decreased with increasing PEG chain length. The data highlight the important role of s..View full abstract
The financial support of this work through the ICI Strategic Research Fund and infrastructure support through the Particulate and Fluids Processing Centre, a Special Research Centre of the Australian Research Council is gratefully acknowledged.