Pickering emulsions of epoxy oligomer stabilized by modified talc microparticles and their properties

Abstract

Lamellar microparticles of talc modified with surfactants of anionic (LEUKONOL LBA-2) and cationic (al- kyldimethylamine N-oxide) types were used as a solid stabilizer of the Pickering emulsion of the 2nd kind (water/oil) of the epoxy oligomer. The microstructure of this emulsion, in contrast to that obtained using an unmodified mineral as a stabilizer, is characterized by significant polydispersity, the presence of a higher concentration of drops of 0.08–1 microns in size, as well as the presence of a larger number of colloidosomes with a diameter of 4–30 microns. The good stability of this emulsion is due to the simultaneous formation of a dispersed phase from droplets with a diameter of 0.02–0.04 microns, which have an additional stabilizing effect on it. Such structural differences led to a higher degree of chemical hardening of the emulsion and the formation of coatings with homogeneous morphology and increased physical and mechanical characteristics, which opens up prospects for its use as film-forming agents in the creation of flame-retardant paint materials.