Preparation and Electro Response of Gelatin/BaTiO3 Core-shell Composite Particles

doi:10.15541/jim20160144

Abstract

Abstract:

The Gelatin/BaTiO₃core-shell composite particles were prepared by directional sedimentary self-assembly on the gelatin microspheres with an average particle size about 0.7-0.9 mm. 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 BaTiO₃significantly can improve BaTiO₃ particles electro response.

Key words: core-shell composite particles, Gelatin/BaTiO3, electro response

CLC Number:

TB333

YANG Xiao-Lei, LU Ya-Ping, GAO Mei-Xiang, XIE Zun-Yuan, GAO Ling-Xiang. Preparation and Electro Response of Gelatin/BaTiO₃ Core-shell Composite Particles[J]. Journal of Inorganic Materials, 2016, 31(12): 1306-1310.

Figures/Tables 6

Fig. 1 TEM images of microspheres Gelatin (a), BaTiO3 (b) and Gelatin/BaTiO3 (c)

Fig. 2 XRD patterns of BaTiO3 , Gelatin/BaTiO3 and Gelatin particles

Fig. 3 FT-IR spectra of Gelatin and Gelatin/BaTiO3 particles

Fig. 4 TG curves of Gelatin/BaTiO3 composite particles

Fig. 5 Photographs of BaTiO3 and Gelatin/BaTiO3 particles dispersed in water, which settled for 5 min (a) and 3 h (b)

Fig. 6 The storage modulus/frequency curves of elastomers with a a': BaTiO3; b b': Gelatin/BaTiO3 composite particles^a, b: A-elastomers ; a', b : B-elastomers

References 29

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Preparation and Electro Response of Gelatin/BaTiO₃ Core-shell Composite Particles

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