Enhancing functional properties of PVDF-HFP/BZT-BCT polymer-ceramic composites by surface hydroxylation of ceramic fillers
| Autor: | Smaranika Dash, Vikas N. Thakur, R.N. Mahaling, Ashok Kumar, Reji Thomas, Balaram Sahoo, Dillip K. Pradhan, Sitendu Kumar Patel |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Filler (packaging) Materials science Process Chemistry and Technology Composite number Polymer Dielectric Microstructure Ferroelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Copolymer Ceramic Composite material |
| Zdroj: | Ceramics International. 47:33563-33576 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2021.08.265 |
| Popis: | We report the mechanism to enhance the dielectric and ferroelectric behavior of polymer-ceramic composites through surface hydroxylation of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-BCT) ceramic filler-particles embedded in PVDF-HFP copolymer matrix. Varying the hydroxylated h-(BZT-BCT) filler particle-content (φ = 0–40 wt%) in PVDF-HFP copolymer matrix, composite films (of ~75 μm thickness) were prepared. We observed that, with an increase in filler content up to an optimum concentration of 15 wt%, a microstructure with gradually denser particle-arrangement and enhanced particles-polymer surface interaction is exhibited, which leads to improved dielectric and ferroelectric behavior. The energy storage density (728 mJ/cm3 at an electric field of 750 kV/cm) of the composite with 15 wt% of h-(BZT-BCT) is found to be much higher than those of the pure BZT-BCT sample, pure PVDF-HFP copolymer and their composites. Our work demonstrates the method of enhancing the functional properties through a suitable microstructure of composite materials with surface-hydroxylation of filler particles. |
| Databáze: | OpenAIRE |
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