Ermias Shimelis, Jinho Bang, Jongwon Jung, Daeik Jang, Beomjoo Yang
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引用次数: 0
摘要
碳纳米管(CNT)和碳纤维(CF)结合的导电聚合物复合材料(CPC)由于其优越的电学和热学性能,在自热应用中具有广阔的应用前景。本研究考察了碳纳米管和CF对碳纳米管/聚二甲基硅氧烷(PDMS)纳米复合材料的导电性和产热能力的协同效应。系统评估三种CF长度(0.1 mm, 3mm和6mm)以建立分层导电网络。与使用0.1 mm CF的CNT/PDMS复合材料相比,使用6 mm CF的CNT/PDMS复合材料的导电性提高了72%。尽管电性能有所提高,但基于模拟和实验验证,其发热能力对CF长度的依赖性很小。采用基于微观力学的数值方法来比较和验证实验结果,确定当前分析模型的局限性,特别是在预测热生成行为方面。
Heat-generation capability of CNT/PDMS nanocomposites with different CF lengths: experimental and numerical approaches
Conductive polymeric composites (CPC) incorporating carbon nanotubes (CNT) and carbon fibers (CF) offer promising potential in self-heating applications due to their superior electrical and thermal properties. This study investigates the synergistic effects of CNT and CF on the electrical conductivity and heat-generation capabilities of CNT/polydimethylsiloxane (PDMS) nanocomposites. Three CF lengths (0.1 mm, 3 mm, and 6 mm) were systematically evaluated to establish hierarchical conductive networks. The incorporation of 6 mm CF into CNT/PDMS composites resulted in a 72% increase in electrical conductivity compared to composites with 0.1 mm CF. Despite these enhancements in electrical performance, the heat-generation capabilities, based on simulations and experimental validation, showed minimal dependence on CF length. A micromechanics-based numerical approach was used to compare and validate the experimental findings, identifying limitations in current analytical models, especially in predicting the heat-generation behavior.
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.