摘要
为了开发轻质柔性可降解电磁屏蔽材料,采用分层喷涂技术制备了MXene/多壁碳纳米管/聚乳酸非织造复合材料。通过基底预处理后依次喷涂多壁碳纳米管分散液与MXene(Ti3C2Tx)分散液,利用喷涂次数调控导电网络结构。结果显示:多壁碳纳米管在纤维表面形成初级导电层,MXene片层通过静电自组装构筑次级导电网络,形成多尺度异质结构,同时保持了材料的孔隙率和柔韧性。当MXene的喷涂次数达到5次时,MXene/多壁碳纳米管/聚乳酸非织造复合材料在X波段(8.2~12.4 GHz)的平均屏蔽效能达到46.8 dB,远高于纯聚乳酸非织造布。屏蔽机制分析表明,复合材料主要通过反射衰减电磁波,同时兼具吸收作用。
Aimed to develop lightweight,flexible,and biodegradable electromagnetic shielding materials,a hierarchical spray-coating technique was employed to fabricate MXene/multiwalled car-bon nanotubes(MWCNTs)/polylactic acid(PLA)nonwoven composites.After substrate pretreat-ment,MWCNTs dispersion and MXene(Ti3C2Tx)dispersion were sequentially sprayed to regu-late the conductive network structure through coating cycles.The results show that MWCNTs formed a primary conductive layer on fiber surfaces,while MXene nanosheets constructed a secondary con-ductive network via electrostatic self-assembly,forming a multi-scale heterostructure while main-taining the material's porosity and flexibility.When MXene coating reached 5 cycles,the com-posite achieved an average shielding effectiveness of 46.8 dB in the X-band(8.2~12.4 GHz),significantly surpassing pure PLA nonwoven fabric.Mechanism analysis confirmed that the com-posite primarily attenuated electromagnetic waves through reflection while simultaneously exhibi-ting absorption effects.
作者
袁稼芮
张磊
纪汉杰
刘毅
李兆清
YUAN Jiarui;ZHANG Lei;JI Hanjie;LIU Yi;LI Zhaoqing(Department of Plague and Brucellosis Prevention and Control,Shaanxi Provincial Centre for Disease Control and Prevention,Xi’an 710054,China;The First Affiliated Hospital,Air Force Medical University of PLA,Xi’an 710032,China;School of Materials Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China)
出处
《纺织高校基础科学学报》
2025年第4期43-49,共7页
Basic Sciences Journal of Textile Universities
基金
航空科学基金(2024Z056111001)
陕西省“科学家+工程师”队伍建设项目(2024QCY-KXJ-122)
空军军医大学校级课题(2022ZZXM021)。
关键词
聚乳酸非织造布
过渡金属碳/氮化物
多壁碳纳米管
电磁屏蔽
polylactic acid nonwoven
MXene
multi-walled carbon nanotubes
electromagnetic interference shielding
