Porous carbon/Fe composites from waste fabric for high-efficiency electromagnetic wave absorption

作     者：Jin-Bo Cheng Hai-Bo Zhao Ai-Ning Zhang Yan-Qin Wang Yu-Zhong Wang Jin-Bo Cheng;Hai-Bo Zhao;Ai-Ning Zhang;Yan-Qin Wang;Yu-Zhong Wang

作者机构：Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE)State Key Laboratory of Polymer Materials EngineeringNational Engineering Laboratory for Eco-Friendly Polymer Materials(Sichuan)College of ChemistrySichuan UniversityChengdu 610064China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第126卷第31期

页      面：266-274页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foun-dation of China(Nos.52122302,51991351,and 51790504) Funda-mental Research Funds for the Central Universities,Young Elite Sci-entists Sponsorship Program by CAST.Financial support by the 111 Project(No.B20001)is sincerely acknowledged 

主　　题：Up recycling Microwave absorption Waste fabrics Thin thickness 

摘      要：Nowadays,a large amount of waste fabrics has brought huge environmental and resource problems,while the traditional recycling routes are downcycling with low efficiency and complex separation ***,we demonstrate a green and facile route to up-recycle waste fabrics(cotton-polyester blending or cotton fabrics)into a high-performance microwave *** this design,an assistant coating was deposited onto the fiber surface of the waste fabric through the assembly of tannic acid-Fe^(2+)(TA-Fe^(2+)),which effectively catalyzed the polymer fiber into highly graphitized porous carbon fiber at high ***,the Fe nanoparticles from the reduction of Fe^(2+)ions were evenly embedded on the surface of porous carbon ***,the resultant porous carbon/Fe composites with hierarchi-cal microstructures displayed excellent microwave absorption ***,the microwave ab-sorber from waste polyester-cotton blended fabric could reach a minimum reflection loss(RL)of-50.5 dB at a thin coating thickness of 1.7 mm,and the minimum RL from waste cotton fabric absorber reached-47.1 dB at a thickness of 2.5 *** work provides a new idea to convert waste fabrics into high value-added microwave absorbing materials in a simple and environmentally friendly way,which will help reuse resources and protect the environment.