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Controllable preparation of CaCu3Ti4O12 nanowires and its strengthening effect on high dielectric polymer composites

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Abstract

CaCu3Ti4O12 nanowires (CCTO-NWs) with different aspect ratios were synthesized by two-step hydrothermal method. CCTO-NWs/PVDF composites were prepared using CCTO-NWs as filler and polyvinylidene fluoride (PVDF) as matrix. The effects of CCTO-NWs content and its aspect ratio on dielectric properties of composites were investigated. Results showed that aspect ratios of CCTO-NWs were obtained as 11.84, 14.47, 17.11, and 19.74 by controlling the first hydrothermal reaction temperature to be 180 °C, 200 °C, 220 °C, and 240 °C. At 102 Hz, the dielectric constant of 70-wt% CCTO-NWs/PVDF composite can reach 62.94, which is 3.7 times higher than that of 10-wt% CCTO-NWs/PVDF composite (13.47). Adding CCTO-NWs with high aspect ratio into matrix can effectively improve dielectric constant. When CCTO-NWs content is 60-wt%, compared with fillers with an aspect ratio of 11.84, fillers with an aspect ratio of 19.74 can make the dielectric constant of composites increase about 64%.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Funding

This work was financially supported by the Shanghai Science and Technology Commission Capacity Building plan project for local institutions (No. 21010500500) and the National Foreign Experts Program of the Ministry of Science and Technology (G2022013070L).

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Authors and Affiliations

  1. School of Energy and Materials, Shanghai Polytechnic University, Shanghai, 201209, China

    Min Zhu, Guan Li, Haiping Xu & Yangke Liao

  2. Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai Polytechnic University, Shanghai, 201209, People’s Republic of China

    Haiping Xu & Huaqing Xie

  3. Shanghai Thermal Property Big Data Professional Technical Service Platform, Shanghai Polytechnic University, Shanghai, 201209, China

    Haiping Xu & Huaqing Xie

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  1. Min Zhu
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  2. Guan Li
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MZ contributed to writing, reviewing, and editing of the manuscript. GL contributed to writing of the original draft. HaX contributed to writing, reviewing, and editing of the manuscript and supervision. HuX contributed to resources and supervision. YL contributed to data curation.

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Correspondence to Haiping Xu.

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Zhu, M., Li, G., Xu, H. et al. Controllable preparation of CaCu3Ti4O12 nanowires and its strengthening effect on high dielectric polymer composites. J Mater Sci: Mater Electron 34, 226 (2023). https://doi.org/10.1007/s10854-022-09417-w

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