Sodium caseinate as a particulate emulsifier for making indefinitely recycled pH-responsive emulsions

Abstract

particles were coated with a layer of NaCas, the resulting formulated emulsions could be switched on and off over 10 cycles. The unique properties of NaCas thus enable the engineering of conventional Pickering emulsions to pH-responsive Pickering emulsions. Finally, we have integrated catalytically active gold (Au) nanoclusters (NCs) into the NaCas protein and then utilized them to produce emulsions. Remarkably, these NaCas-Au NCs assembled at the oil-water interface exhibited excellent catalytic activity and cyclability, not only in aqueous solution, but also in complicated seawater environments.