Fig. 2. pH-responsive emulsions stabilized by NaCas. (a) Appearance and optical micrographs of successive pH-responsive NaCas-stabilized emulsion (0.1 wt%) conversion cycles using ethyl acetate as the oil phase (1st, 30th and 99th cycle). (b) Appearance and optical micrographs of emulsions stabilized by NaCas using a saturated salt solution as the solvent. (c) Appearance and optical micrographs of emulsions stabilized by NaCas using seawater as the solvent. Scale bar, 30 μm.
