Facile fabrication of sepiolite functionalized composites with tunable dielectric properties and their superior microwave absorption performance

doi:10.1016/j.jcis.2020.05.052

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Facile fabrication of sepiolite functionalized composites with tunable dielectric properties and their superior microwave absorption performance
	Shang, Qiong 1,3; Feng, Huixia 3,4; Feng, Zeyu 3; Chen, Nali 3,4; Tan, Lin 3,4; Qiu, Jianhui 2; Wu, Hongjing 5
刊名	Journal of Colloid and Interface Science
	2020-09-15
卷号	576 页码:444-456
关键词	Electromagnetic fields Fabrication Polyaniline Conductive networks Effective absorption Electrical conductivity In-situ polymerization Microwave absorption Polarization relaxation Polyaniline composites Tunable dielectric properties
ISSN号	00219797
DOI	10.1016/j.jcis.2020.05.052
英文摘要	Although various materials have been studied for the purpose of microwave absorption (MA), natural sepiolite (SEP) has never been reported as MA absorber. Herein, the series of sepiolite@polyaniline composites (SEP@PANI-x) with "skeleton/skin" structure were fabricated through a facile in-situ polymerization technique and firstly developed as MA materials. The electrical conductivity and dielectric properties can be well controlled via modulating the PANI content in the composites. With a lower mass ratio of 30 wt%, it is worth noting that the optimized SEP@PANI-50 could simultaneously display the optimal minimum reflection loss (RLmin) of −50.23 dB and effective absorption bandwidth (EAB, RL min values lower than −20 dB (99% absorption) are all achieved and the EAB ranges the entire Ku, X, and C bands. Such excellent MA performance comes from rich conductive network and polarization relaxation, which ultimately balance the impedance matching and attenuation ability. In view of its facile synthesis route, low-cost, lightweight and excellent MA performance, SEP@PANI-50 would be a very promising MA candidate in many practical applications. More importantly, we also think that our findings will expand the application of SEP-based composites in the electromagnetic field. © 2020 Elsevier Inc.
语种	英语
出版者	Academic Press Inc.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115515]
专题	石油化工学院教务处（创新创业学院）
作者单位	1.School of Chemistry and Chemical Engineering, Lanzhou City University, Lanzhou; 730070, China; 2.Department of Machine Intelligence and Systems Engineering Faculty of Systems Engineering, Akita Prefectural University, Akita; 015-0055, Japan 3.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 4.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 5.MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710072, China;
推荐引用方式 GB/T 7714	Shang, Qiong,Feng, Huixia,Feng, Zeyu,et al. Facile fabrication of sepiolite functionalized composites with tunable dielectric properties and their superior microwave absorption performance[J]. Journal of Colloid and Interface Science,2020,576:444-456.
APA	Shang, Qiong.,Feng, Huixia.,Feng, Zeyu.,Chen, Nali.,Tan, Lin.,...&Wu, Hongjing.(2020).Facile fabrication of sepiolite functionalized composites with tunable dielectric properties and their superior microwave absorption performance.Journal of Colloid and Interface Science,576,444-456.
MLA	Shang, Qiong,et al."Facile fabrication of sepiolite functionalized composites with tunable dielectric properties and their superior microwave absorption performance".Journal of Colloid and Interface Science 576(2020):444-456.