Ultra-light, high flexible and efficient CNTs/Ti3C2-sodium alginate foam for electromagnetic absorption application

查看全文 作　　者：Xingmin [2]Liu;Nan [2]Chai;Zhaoju [1,3]Yu;Hailong [4]Xu;Xinliang [4]Li;Jiquan [5]Liu;Xiaowei [4]Yin;Ralf [2,3,4]Riedel

机构地区：[1]College of Materials,Key Laboratory of High Performance Ceramic Fibers(Xiamen University),Ministry of Education,Xiamen,361005,China;[2]Institutfiir Materialwissenschaft,Technische Universitdt Darmstadt,D-64287,Darmstadt,Germany;[3]College of Materials,Fujian Key Laboratory of Advanced Materials,Xiamen University,Xiamen,361005,China;[4]Science and Technology on Thermostructural Composite Materials Laboratory,Northwestern Polytechnical University,Xi'an,710072,China;[5]Technische Universitat Darmstadt,Eduard-Zintl-lnstitutfur Anorganische und Physikalische Chemie,Alarich-Weiss-Straβe 4.D-64287,Darmstadt,Germany

出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第12期,共9页

摘　　要：Ultra-light carboxylic functionalized multi-walled carbon nanotubes(CNTs-COOH) and Ti3C2 MXene hybrids modified sodium alginate(CNTs/Ti3C2-SA) based composite foams were prepared through ice-templated freeze-drying method. The microstructure of the synthesized CNTs/Ti3C2 hybrids and CNTs/Ti3C2-SA foams is characterized by the presence of CNTs inserted between MXene layers which prevents their restacking. The resultant CNTs/Ti3C2 hybrids exhibit a unique sandwich-like hierarchical structure. Scanning electron microscopy(SEM) images show that the CNTs/Ti3C2-SA foam exhibits a heterogeneous anisotropic microstructure and CNTs/Ti3C2 hybrids are homogeneously dispersed in the skeleton of the porous foam. In case that the content of the hybrids amounts 40 mg/cm^3, the CNTs/Ti3C2-SA foam possesses excellent electromagnetic(EM) absorption performance with a minimum reflection coefficient(RCmin) as low as-40.0 dB. In case of a sample thickness of 3.95 mm, the RCminreaches-24.4 dB and the effective absorption bandwidth covers the whole X band from 8.2 to 12.4 GHz. A control test shows that, with the same absorbent content, the CNTs/Ti3C2-SA foam exhibits a far better EM performance than that of CNT-free Ti3C2-SA foam. 关键词：Carbon nanotubes MXene Sodium alginate Electromagnetic absorption properties

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Ultra-light, high flexible and efficient CNTs/Ti3C2-sodium alginate foam for electromagnetic absorption application

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