Preparation and electro response of gelatin/BaTiO3 core-shell composite particles

Abstract

The Gelatin/BaTiO3 core-shell composite particles were prepared by directional sedimentary self-assembly on the gelatin microspheres with an average particle size about 0.7-0.9 μm. Morphology, structure, composition, and surface hydrophile of the particle were characterized by TEM, XRD, FT-IR, TG, and optical contact angle measuring instrument. The results show that the composite particles are spherical with hydrophilic surface and good dispersion, of which cubic BaTiO3 shell accounts for about 18.8% of the total weight. After BaTiO3 and Gelatin/BaTiO3 particles being dispersed into gelatin hydrous elastomers cured with/without an electric field, the difference of storage modulus of the elastomers suggests that Gelatin/BaTiO3 composite particles have stronger electro response than pure BaTiO3 particles. These data demonstrate that coating polymer with BaTiO3 significantly can improve BaTiO3 particles electro response.