title: One-dimensional carbon nanotube@barium titanate@polyaniline multiheterostructures for microwave absorbing application.
abstract: Multiple-phase nanocomposites filled with carbon nanotubes (CNTs) have been developed for their significant potential in microwave attenuation. The introduction of other phases onto the CNTs to achieve CNT-based heterostructures has been proposed to obtain absorbing materials with enhanced microwave absorption properties and broadband frequency due to their different loss mechanisms. The existence of polyaniline (PANI) as a coating with controllable electrical conductivity can lead to well-matched impedance. In this work, a one-dimensional CNT@BaTiO3@PANI heterostructure composite was fabricated. The fabrication processes involved coating of an acid-modified CNT with BaTiO3 (CNT@BaTiO3) through a sol-gel technique followed by combustion and the formation of CNT@BaTiO3@PANI nanohybrids by in situ polymerization of an aniline monomer in the presence of CNT@BaTiO3, using ammonium persulfate as an oxidant and HCl as a dopant. The as-synthesized CNT@BaTiO3@PANI composites with heterostructures were confirmed by various morphological and structural characterization techniques, as well as conductivity and microwave absorption properties. The measured electromagnetic parameters showed that the CNT@BaTiO3@PANI composites exhibited excellent microwave absorption properties. The minimum reflection loss of the CNT@BaTiO3@PANI composites with 20 wt % loadings in paraffin wax reached -28.9 dB (approximately 99.87% absorption) at 10.7 GHz with a thickness of 3 mm, and a frequency bandwidth less than -20 dB was achieved from 10 to 15 GHz. This work demonstrated that the CNT@BaTiO3@PANI heterostructure composite can be potentially useful in electromagnetic stealth materials, sensors, and electronic devices.
authors.affiliation: Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education, Zhejiang Sci-Tech University, No.928 Second Avenue Xiasha Higher Education Zone, Hangzhou, 310018 People's Republic of China.
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Ni
authors.affiliation: Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education, Zhejiang Sci-Tech University, No.928 Second Avenue Xiasha Higher Education Zone, Hangzhou, 310018 People's Republic of China ; National Engineering Lab for Textile Fiber Materials and Processing Technology, Zhejiang Sci-Tech University, No.928, Second Avenue, Xiasha Higher Education Zone, Hangzhou, 310018 People's Republic of China.
authors.forename: Yao-Feng
authors.initials: YF
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education, Zhejiang Sci-Tech University, No.928 Second Avenue Xiasha Higher Education Zone, Hangzhou, 310018 People's Republic of China.
authors.forename: Lu-Jun
authors.initials: LJ
authors.lastname: Yu
authors.affiliation: Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education, Zhejiang Sci-Tech University, No.928 Second Avenue Xiasha Higher Education Zone, Hangzhou, 310018 People's Republic of China.
authors.forename: Ya-Qin
authors.initials: YQ
authors.lastname: Fu
keywords: BaTiO3; Carbon nanotube; Heterostructure; Microwave absorption; Polyaniline