Innovative fabrication of CNT/SiC composite fibers via impregnation-wet twisting-pyrolysis: Advancements in strength, conductivity, and EMI shielding

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Pub Date : 2024-11-09 DOI:10.1016/j.carbon.2024.119812

Lingzhi Cheng , Kang Cheng , Shuxuan Qu , Xinrong Jiang , Xin Sui , Munan Lu , Weibang Lyu

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Abstract

Floating catalyst chemical vapor deposition (FCCVD) is a key method for synthesizing high-strength, electrically conductive carbon nanotube (CNT) fibers. However, the high porosity of FCCVD CNT fibers limits the full utilization of the intrinsic performance of CNTs. It remains a challenge to assemble and continuous fabricate high-performance CNT fibers. Herein, this study proposed an impregnation-wet twisting-pyrolysis process to fabricate continuous CNT/SiC composite fibers to enhance the mechanical and electrical properties by reducing pore sizes and improving the interaction between CNTs. The resulting compact structure and enhanced interfacial interactions of the CNT/SiC fibers exhibited both high strength (2015.27 MPa) and high electrical conductivity (7.2 × 10⁵ S/m), representing increases of 130.8 % and 69.9 % compared to pristine CNT fibers. The unidirectional laminates assembled by continuous CNT/SiC fibers demonstrated high electromagnetic interference (EMI) shielding effectiveness of 66.33 dB. This innovative continuous process holds significant potential for the industrial utilization of CNT/SiC fibers.

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通过浸渍-湿法加捻-热解创新性地制造出 CNT/SiC 复合纤维：强度、导电性和电磁干扰屏蔽方面的进步

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.