Structural modulation of graphene–polyimide interfaces below pyrolysis temperature under electrothermal treatment

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-10-08 DOI:10.1007/s42823-024-00810-5

Jianshu Yu, Hui Ding, Bin Chen, Xuejiao Sun, Ying Zhang, Zhongfu Zhou

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Abstract

In the area of carbon-based thin films, graphene/polyimide conductive films display remarkable heat resistance and mechanical properties, making them a valuable resource for utilisation in a multitude of manufacturing and living contexts. Nevertheless, modulating the interfacial structure between graphene and polyimide represents a significant challenge in the pursuit of enhancing the conductivity of the composite films, due to the elevated initial temperature of polyimide pyrolysis (exceeding 600 °C). To develop it, this study found that polyimide could undergo chemical bond breaking and atomic rearrangement at around 500 °C, when subjected to an applied electric field in graphene/polyimide films. A series of characterisations showed that the graphene/polyimide film formed a new interfacial structure under electrothermal treatment, which enhanced the electron transport capacity and increased its conductivity from about 1497.01 s m⁻¹ to about 2688.17 s m⁻¹, with an increase of about 79.57%. This study would provide the possibility of modulating the structure of polyimide below the pyrolysis temperature, as well as a feasible idea for transferring the properties of graphene into the polyimide matrix.

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电热处理下石墨烯-聚酰亚胺界面在热解温度下的结构调制

在碳基薄膜领域，石墨烯/聚酰亚胺导电薄膜表现出卓越的耐热性和机械性能，使其成为在众多制造和生活环境中使用的宝贵资源。然而，由于聚酰亚胺热解的初始温度升高（超过600℃），调节石墨烯和聚酰亚胺之间的界面结构是提高复合薄膜导电性的一个重大挑战。为了开发它，本研究发现，在石墨烯/聚酰亚胺薄膜中，当施加电场时，聚酰亚胺可以在500°C左右发生化学键断裂和原子重排。一系列表征表明，石墨烯/聚酰亚胺薄膜在电热处理下形成了新的界面结构，电子传递能力增强，电导率从1497.01 s m−1提高到2688.17 s m−1，提高了约79.57%。该研究为在热解温度以下调节聚酰亚胺的结构提供了可能性，并为将石墨烯的性质转移到聚酰亚胺基体中提供了可行的思路。

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

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.