Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO3 composite particles
| Autor: | Meixiang Gao, Zunyuan Xie, Lingxiang Gao, Weiqiang Zhang, Yaping Lu, Wen Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Polarized light microscopy
Materials science Scanning electron microscope General Chemical Engineering Composite number Nanoparticle 02 engineering and technology General Chemistry Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology Elastomer 01 natural sciences 0104 chemical sciences Contact angle Particle Composite material 0210 nano-technology |
| Zdroj: | RSC Advances. 9:12404-12414 |
| ISSN: | 2046-2069 |
| Popis: | A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature. The PMMA@BT composite particles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction, video-based optical contact angle measurement, thermogravimetric analysis, and impedance analysis. The electroresponses of the obtained PMMA@BT composite particles were all stronger than that of pure BT, and the electroresponse depended on the weight percentage of the BT shell. The PMMA@BT particles with the optimal core–shell structure contained 58.14 wt% of BT shell. The surface hydrophilicity of the optimal particles was close to that of pure BT, and the dielectric constant was the greatest among the series of synthesized PMMA@BT particles. Thus, the optimized PMMA@BT particles demonstrated the strongest electroresponsive behavior in gelatin hydrogel elastomer, as demonstrated by polarized microscopy and dynamic mechanical analysis. The excellent electroresponsive property of the optimal PMMA@BT particles is reflected by the large sensitivity of the increase in storage modulus for the gelatin hydrogel elastomer containing the composite particles (21% at E = 0.8 kV mm−1 and a particle loading of 1.0 wt%), far greater than that of pure BT particles (4.7%). Based on the sensitive electroresponsive properties, the PMMA@BT particles have potential applications as electroresponsive materials. |
| Databáze: | OpenAIRE |
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