MXene/海藻酸钠复合纤维电磁屏蔽性能研究

MXene/Sodium Alginate Composite Fibers for Electromagnetic Shielding

随着电信设备数量的不断增多带来的日益严峻的电磁辐射问题,人们对电磁屏蔽织物的需求逐渐增多。二维纳米材料MXene具有高电导率、高电子迁移率的特点,因此在电磁屏蔽领域拥有非常重要的研究价值。本文使用微流控湿法纺丝技术制备了MXene/海藻酸钠复合纤维,研究了MXene添加量对复合纤维各项性能的影响。当复合纤维中MXene的含量增加时,MXene/海藻酸钠复合纤维的电阻逐渐降低;当MXene含量为30 wt%时,电阻降低为177Ω·cm^(-1)。此外,40 wt%MXene/海藻酸钠复合纤维的织物在11.96 GHz处最小反射系数达-49.5 dB,具有良好的电磁屏蔽性能。本研究采用的微流控湿法纺丝技术为功能复合纤维的制备提供了一种有效方法,所制备的MXene/海藻酸钠复合纤维可作为制造功能性纳米复合材料和电磁屏蔽材料体系的重要补充。

With the increase of telecommunication equipment,more and more electromagnetic radiation problems have emerged and people's demand for electromagnetic shielding fabrics has gradually increased.As a 2-D nano material,MXene has the characteristics of high conductivity and high electron mobility,so it is of very important research value in the field of electromagnetic shielding.In this paper,microfluidics wet-spinning technology was used to prepare MXene/sodium alginate(SA)composite fibers and the influence of varying amount of MXene on the properties of composite fibers was studied.As the content of MXene in the composite fiber increased,the resistance of MXene sodium alginate composite fiber gradually decreased,and when the content of MXene was 30 wt%,the resistance decreased to 177Ω·cm^(-1).Besides,the fabric of 40 wt%MXene/sodium alginate composite fibers had a minimum reflection coefficient of-49.5 dB at 11.96 GHz,which had good electromagnetic shielding performance.The wet microfluidic spinning technology adopted in this study provides an effective method for the preparation of functional composite fibers.The preparation of MXene/sodium alginate composite fibers may shed a new light on the fabrication of functional nano composite fibers and electromagnetic shielding material system.