摘要
用喷涂雾化沉积工艺将MXene二维纳米片层结构涂覆在碳纤维毡(CFF)的表面制备MXene@CFF复合薄膜,研究了MXene含量对其微观结构、导电性以及电磁屏蔽性能的影响。结果表明,MXene的引入可显著提高CFF的导电性和电磁屏蔽性能,MXene的质量分数为2.37%的复合薄膜其表面电阻率从9.3Ω/sq降低到2.7Ω/sq;在X波段(8.2~12.4 GHz)复合薄膜的电磁屏蔽性能达到57.9 dB,比CFF提高了27.8%,且其主要机制是电磁波的反射(反射系数达0.95)。这些性能,可归因于MXene的高导电性、复合薄膜的多层次孔结构以及界面多重反射与吸收损耗的协同作用。
Development of lightweight,flexible,and high-efficiency electromagnetic shielding films is urgently required for practical application for wearable devices,thin-film electronics,and miniaturized equipment.In order to significantly enhance the electrical conductivity and electromagnetic shielding effectiveness(EMI SE)of carbon fiber felts(CFFs),MXene nanosheets were well dispersed in ethanol aqueous solutions and then spray-deposited onto CFF surfaces to fabricate MXene@CFF composite films.The effect of MXene deposition on the micromorphology,electrical conductivity and EMI SE of the composite films was investigated in detail.The results showed that the incorporation of MXene could significantly improve the EMI shielding performance.The surface electrical resistivity of the composite films with 2.37%(mass fraction)MXene decreased from 9.3Ω/sq to 2.7Ω/sq,while the EMI SE in the range of 8.2~12.4 GHz(X-band)increased to 57.9 dB,increasing by 27.8%in comparison with that of the bare CFFs.This performance improvement may mainly be attributed to the enhanced electrical conductivity of MXene-coated CFFs,the hierarchical porous structure,and the increased multiple reflection and absorption at multi-component interfaces.
作者
孙波
张天宇
赵强强
王函
佟钰
曾尤
SUN Bo;ZHANG Tianyu;ZHAO Qiangqiang;WANG Han;TONG Yu;ZENG You(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China)
出处
《材料研究学报》
北大核心
2025年第4期289-295,共7页
Chinese Journal of Materials Research
基金
国家自然科学基金(52472056,52130209)
辽宁省应用基础研究计划项目(2023JH26/10300015)
辽宁省自然科学基金(22-KF-12-04)
纳米功能复合材料山西省重点实验室开放基金(NFCM202102)
沈阳市科技计划项目(22-316-1-04)。
关键词
复合材料
电磁屏蔽性能
导电性
MXene
碳纤维毡
composite
electromagnetic shielding performance
electrical conductivity
MXene
carbon fiber felt
作者简介
孙波,女,2000年生,硕士生;张天宇,男,1996年生,博士生;通讯作者:曾尤,研究员,yzeng@imr.ac.cn,研究方向为纳米炭复合材料;通讯作者:佟钰,副教授,tong_yu123@hotmail.com,研究方向为微纳米复合结构。
