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The surface modification of BaTiO 3 and its effects on the microstructure and electrical properties of BaTiO 3 /silicone rubber composites
Author(s) -
Guan Shanshan,
Li Hai,
Zhao Shugao,
Guo Laina
Publication year - 2018
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21590
Subject(s) - materials science , nanocomposite , composite material , dielectric , silicone rubber , microstructure , dielectric loss , natural rubber , ceramic , polymer , nanoparticle , surface modification , composite number , chemical engineering , nanotechnology , optoelectronics , engineering
Interfacial interaction and compatibility between the ceramic dielectric and polymer matrix have strong impact on the dielectric constant and dielectric loss of their composites. In this work, the BaTiO 3 (BT) nanoparticles were modified by (1) stearic acid (SA); (2) aluminate coupling agent (ACA); (3) the combination of SA and coupling agent aluminate, and then incorporated them with silicone rubber (SR) matrix to prepare BT/SR nanocomposites. The effects of the surface modification methods of BT on the microstructure and electrical properties of BT/SR nanocomposite films were studied. The results showed that SA and ACA were beneficial to the dispersion of BT and resulted in the strong interfacial interaction. The composite of BT modified by SA not only had high dielectric constant of 10.5, 2 times higher than that of the unmodified BT/SR nanocomposite (4.7), at the same time showed lower dielectric loss. J. VINYL ADDIT. TECHNOL., 24:288–294, 2018. © 2017 Society of Plastics Engineers