Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites
A novel calcium copper titanate (CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>)–polyvinylidene fluoride composite (CCTO@PVDF) with Cu-deficiency was successfully prepared through the molten salt-assisted method. The morphology and structure of polymer composites un...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/20/4328 |
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| author | Jinfa Ou Yonghui Chen Jiafu Zhao Shaojuan Luo Ka Wai Wong Ka Ming Ng |
| author_facet | Jinfa Ou Yonghui Chen Jiafu Zhao Shaojuan Luo Ka Wai Wong Ka Ming Ng |
| author_sort | Jinfa Ou |
| collection | DOAJ |
| description | A novel calcium copper titanate (CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>)–polyvinylidene fluoride composite (CCTO@PVDF) with Cu-deficiency was successfully prepared through the molten salt-assisted method. The morphology and structure of polymer composites uniformly incorporated with CCTO nanocrystals were characterized. At the same volume fraction, the CCTOs with Cu-deficiency displayed higher dielectric constants than those without post-treatment. A relatively high dielectric constant of 939 was obtained at 64% vol% CCTO@PVDF content, 78 times that of pure PVDF. The high dielectric constants of these composites were attributed to the homogeneous dispersion and interfacial polarization of the CCTO into the PVDF matrix. These composites also have prospective applications in high-frequency regions (10<sup>6</sup> Hz). The enhancement of the dielectric constant was predicted in several theoretical models, among which the EMT and Yamada models agreed well with the experimental results, indicating the excellent distribution in the polymer matrix. |
| first_indexed | 2024-03-09T19:32:34Z |
| format | Article |
| id | doaj.art-57165447dd6e4c56a51a63792bf88290 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T19:32:34Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-57165447dd6e4c56a51a63792bf882902023-11-24T02:07:19ZengMDPI AGPolymers2073-43602022-10-011420432810.3390/polym14204328Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer CompositesJinfa Ou0Yonghui Chen1Jiafu Zhao2Shaojuan Luo3Ka Wai Wong4Ka Ming Ng5School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, ChinaDepartment of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong KongDepartment of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong KongA novel calcium copper titanate (CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>)–polyvinylidene fluoride composite (CCTO@PVDF) with Cu-deficiency was successfully prepared through the molten salt-assisted method. The morphology and structure of polymer composites uniformly incorporated with CCTO nanocrystals were characterized. At the same volume fraction, the CCTOs with Cu-deficiency displayed higher dielectric constants than those without post-treatment. A relatively high dielectric constant of 939 was obtained at 64% vol% CCTO@PVDF content, 78 times that of pure PVDF. The high dielectric constants of these composites were attributed to the homogeneous dispersion and interfacial polarization of the CCTO into the PVDF matrix. These composites also have prospective applications in high-frequency regions (10<sup>6</sup> Hz). The enhancement of the dielectric constant was predicted in several theoretical models, among which the EMT and Yamada models agreed well with the experimental results, indicating the excellent distribution in the polymer matrix.https://www.mdpi.com/2073-4360/14/20/4328CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>Cu-deficiencyPVDF matrixdielectric propertypost-treatment |
| spellingShingle | Jinfa Ou Yonghui Chen Jiafu Zhao Shaojuan Luo Ka Wai Wong Ka Ming Ng Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites Polymers CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> Cu-deficiency PVDF matrix dielectric property post-treatment |
| title | Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites |
| title_full | Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites |
| title_fullStr | Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites |
| title_full_unstemmed | Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites |
| title_short | Nano-Sized Calcium Copper Titanate for the Fabrication of High Dielectric Constant Functional Ceramic–Polymer Composites |
| title_sort | nano sized calcium copper titanate for the fabrication of high dielectric constant functional ceramic polymer composites |
| topic | CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> Cu-deficiency PVDF matrix dielectric property post-treatment |
| url | https://www.mdpi.com/2073-4360/14/20/4328 |
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