中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物的制备及其电磁屏蔽性能  

Preparation and electromagnetic shielding performance of hollow magnetic Fe_(3)O_(4) nanosphere/MXene composite cotton fabrics

作　　者：郑贤宏 唐金好 李长龙 王炜[1,3] ZHENG Xianhong;TANG Jinhao;LI Changlong;WANG Wei(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China;School of Textile and Garment,Anhui Polytechnic University,Wuhu,Anhui 241000,China;Saintyear Holding Group Co.,Ltd.,Hangzhou,Zhejiang 311200,China)

机构地区：[1]东华大学化学与化工学院,上海201620 [2]安徽工程大学纺织服装学院,安徽芜湖241000 [3]三元控股集团有限公司,浙江杭州311200

出　　处：《纺织学报》2023年第11期142-150,共9页Journal of Textile Research

基　　金：国家自然科学基金项目(52303051);安徽省教育厅重大项目(2022AH040137);安徽省自然科学基金项目(2308085ME146,2008085QE213)。

摘　　要：为优化导电织物对电磁波的阻抗匹配性,减少电磁波的二次污染,在棉织物中引入磁损耗材料中空Fe_(3)O_(4)纳米球,并通过层层组装的方法将其与过渡金属碳化物/氮化物(MXene)结合制备中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物,探究中空磁性Fe_(3)O_(4)纳米球对复合棉织物电磁屏蔽性能的影响规律和作用机制。借助超景深显微镜、扫描电子显微镜和矢量网络分析仪对中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物的形貌结构和电磁屏蔽性能进行表征与分析。结果表明:通过水热合成制备的Fe_(3)O_(4)具有中空球状形貌和尖晶石晶体结构,颗粒尺寸较为均匀,为(271.9±4.6)nm;随着Fe_(3)O_(4)/MXene负载循环次数的增加,复合棉织物的方阻逐渐减小,最低为(10.5±1.7)Ω/,并展现出较好的透气性;复合棉织物的电磁屏蔽性能也逐渐增强,最高电磁屏蔽效能可达(29.03±0.3)dB,且织物的屏蔽机制由吸收为主逐渐向反射为主转变,其优异的电磁屏蔽性能主要归因于MXene纳米片和中空磁性Fe_(3)O_(4)纳米球的协同作用。Objective Lightweight,flexible,air permeable and high-performance electromagnetic interference(EMI)shielding materials are urgently required to solve the increasingly serious electromagnetic radiation pollution.Transition metal carbides/nitrides(MXenes)have attracted much attention in the area of EMI shielding because of their high metallic electrical conductivity.However,the MXene modified fabrics usually exhibited reflection-dominant EMI shielding mechanism because of the impedance mismatch.Therefore,it is still a critical challenge to fabricate high-performance MXene-based EMI shielding fabrics with tunable EMI shielding performance and mechanism.Method Constructing multilayer heterogeneous structure of hollow magnetic Fe_(3)O_(4) nanospheres(HFOs)/MXene is an efficient approach to improve and tune the EMI shielding performance of the composite fabrics,because the HFOs and MXene can absorb the electromagnetic waves by means of the magnetic loss and conductive loss,respectively.More importantly,the electromagnetic waves will be attenuated in the multilayer heterogeneous structure due to the multiple reflections.However,the paper proposed relatively few studies devote to studying the EMI shielding performance of HFOs/MXene modified fabrics.Herein,the paper proposed a layer-by-layer assembly strategy to construct multilayer heterogeneous structure of hollow magnetic Fe_(3)O_(4) nanospheres/MXene on the cotton woven fabrics to fabricate high-performance EMI shielding fabrics.Results HFOs were prepared by hydrothermal method,which exhibited the hollow morphology(with a diameter of(271.9±4.6)nm)with the inverse spinel structure(Fig.2).Fe_(3)O_(4)/MXene modified fabrics were fabricated by the layer-by-layer assembly.The cotton fabrics were firstly deposited with MXene nanosheets by the spray-coating method.The HFOs were positively charged by using the cetyltrimethylammonium bromide(CTAB),which were deposited on the MXene modified fabrics by the electrostatic attraction to fabricate the HFOs/MXene composite fabrics.T

关 键 词：过渡金属碳化物/氮化物 Fe_(3)O_(4)纳米球 复合棉织物 层层组装 电磁屏蔽 屏蔽机制 

分 类 号：TS195.5[轻工技术与工程—纺织化学与染整工程]