A Novel Nano C@BaTiO3 Fibers/ Polar Trans-cyclohexane Modified Polyimide Composite Films with Enhanced Dielectric Properties and Energy Storage Density

IF 12.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Central Science Pub Date : 2024-11-06 DOI:10.1039/d4ta06322h

xingwu jiang, Xiang Wang, Peifeng Liu, Jinzheng Huang

引用次数: 0

Abstract

Polyimide (PI), a kind of polymer with excellent heat resistance, processing, mechanical and electrical insulation performance, stands out as a prime candidate for advanced dielectric energy storage materials. However, the low dielectric constant of PI has hindered its broader development, requiring dielectric modification. In order to increase the dielectric constant of PI, PI with polar trans-cyclohexane structure was synthesis and characterized and then reinforced with nano C@BT-fibers to produce a novel nano fiber reinforced PI film. Experimental results demonstrate that polar trans-cyclohexane enables pure PI films to achieve a dielectric constant of 8.89 at 100 Hz. Meanwhile, the dielectric constant of C@BT-fibers/modified PI composite films indeed enhance up to 39.48 at 100 Hz and the energy storage density increases to 1.028 J/cm3 with only 1.0 wt% addition content of C@BT-fibers, increased 117.3% compared with pure PI (0.473 J/cm3).

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一种新型纳米 C@BaTiO3 纤维/极性跨环己烷改性聚酰亚胺复合薄膜，具有更强的介电性能和储能密度

聚酰亚胺（PI）是一种聚合物，具有优异的耐热性、加工性、机械和电气绝缘性能，是先进电介质储能材料的主要候选材料。然而，聚酰亚胺的介电常数较低，阻碍了其更广泛的发展，需要对其进行介电改性。为了提高 PI 的介电常数，研究人员合成并表征了具有极性反式环己烷结构的 PI，然后用纳米 C@BT 纤维对其进行增强，制备出一种新型纳米纤维增强 PI 薄膜。实验结果表明，极性反式环己烷能使纯 PI 薄膜在 100 Hz 频率下的介电常数达到 8.89。同时，C@BT 纤维/改性 PI 复合薄膜的介电常数在 100 Hz 时确实提高到了 39.48，而且 C@BT 纤维的添加量仅为 1.0 wt%，能量存储密度就增加到了 1.028 J/cm3，比纯 PI（0.473 J/cm3）提高了 117.3%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Central Science Chemical Engineering-General Chemical Engineering

CiteScore

25.50

自引率

0.50%

发文量

194

审稿时长

10 weeks

期刊介绍： ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.