Research on the dielectric properties of flexible β-CD/PVDF all-organic films

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2024-11-10 DOI:10.1016/j.carbpol.2024.122968

Ming Wang , Hongwei Lu , Bengang Li , Shijia Yang , Weitao Su

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Abstract

All-organic dielectric polymers are currently a hot topic in the study of dielectric materials. However, it is still challenging to improve the dielectric constant, breakdown strength, and energy storage density of materials simultaneously. This study used PVDF as the matrix, and β-CD/PVDF all-organic composite dielectric films were prepared using a solution blending method. The research found that after the introduction of β-Cyclodextrin (β-CD), the β-phase content of the polymer and the crystallinity of the films were 40.9 % and 48.96 %, respectively, which are 1.1 and 1.4 times that of pure PVDF. Improved microstructure significantly enhanced the dielectric performance and energy density of the composite films with β-CD. The composite films with β-CD with dielectric constant (ε_r), breakdown strength (E_b), and energy density reaching 12.35, 401.7 MV/m, and 6.11 J/cm³, respectively, which are 1.38, 1.1, and 1.3 times that of pure PVDF. This method provides a new pathway for preparing all-organic dielectric films with high dielectric constant, high breakdown strength, and high energy density.

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柔性 β-CD/PVDF 全有机薄膜的介电性能研究

全有机介电聚合物是目前介电材料研究的热门话题。然而，如何同时提高材料的介电常数、击穿强度和储能密度仍是一项挑战。本研究以 PVDF 为基体，采用溶液共混法制备了 β-CD/PVDF 全有机复合介质薄膜。研究发现，引入β-环糊精（β-CD）后，聚合物的β相含量和薄膜的结晶度分别为 40.9 % 和 48.96 %，是纯 PVDF 的 1.1 倍和 1.4 倍。微观结构的改善大大提高了β-CD 复合薄膜的介电性能和能量密度。β-CD复合薄膜的介电常数（εr）、击穿强度（Eb）和能量密度分别达到了12.35、401.7 MV/m和6.11 J/cm3，是纯PVDF的1.38、1.1和1.3倍。该方法为制备具有高介电常数、高击穿强度和高能量密度的全有机介质薄膜提供了一条新途径。

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.