Enhancement on electric responses of BaTiO3 particles with polymer‐coating
Source abstract
Abstract
To enhance electric response by polymer coating, BaTiO3/polymer shell–core composite particles were prepared by emulsion polymerization with polyimide, chitosan, polystyrene, polyacrylic acid, and polyacrylamide. Their micro structure was characterized by transmission electron microscopy, Fourier transform infrared, and automatic X‐ray diffraction, their properties were investigated using optical contact angle and dielectric constant, and their electric responses were studied indirectly by dynamic viscoelasticity analyzer. The results showed that BaTiO3 cores remained in cubic, the surface hydrophilic of the particles changed as follows: BaTiO3 > BaTiO3/PI > BaTiO3/PAM > BaTiO3/Chitosan > BaTiO3/PAA > BaTiO3/PS, and the dielectric constants of the particles varied with the order of that BaTiO3 > BaTiO3/PI > BaTiO3/PAM > BaTiO3/Chitosan > BaTiO3/PAA > BaTiO3/PS. Eventually, the particles' electric response activities exhibited the order of BaTiO3/PI > BaTiO3/PAM > BaTiO3/Chitosan > BaTiO3/PAA > BaTiO3/PS > BaTiO3. Furthermore, the electric response of the particles showed a chief dependence on polymer‐coating, surface hydrophilic, and dielectric constant. As a result, BaTiO3 particles' electric response was much enhanced by polymer‐coating, and their compatibility to aqueous continuous phase was ameliorated. For the BaTiO3/polymer particles, fine surface hydrophile and high dielectric constant dominated the strong response to electric field. Ultimately, BaTiO3/PI and BaTiO3/PAM particles possessed the strongest electric response in the five composite particles. The conclusion suggests an effective approach to prepare excellent hydrous electrorheological elastomers. POLYM. COMPOS., 34:897–903, 2013. © 2013 Society of Plastics Engineers
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Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Dielectric materials and actuators · Electrowetting and Microfluidic Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University), Ministry of Education Xi'an 710062 People's Republic of China
School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 People's Republic of China
College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 People's Republic of China
Funding
Natural Science Foundation of China
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