RGO粘胶复合织物的电磁屏蔽与电热行为研究

Study on electromagnetic shielding and electrothermal behavior of RGO viscose composite fabric

通过涂覆浸渍使还原氧化石墨烯(RGO)与粘胶非织造布复合,实现其功能改性。采用改进的Hummers法制备氧化石墨烯(GO),通过浸渍法制得GO粘胶复合织物,并采用水合肼还原成RGO粘胶复合织物。借助扫描电子显微镜和傅里叶红外光谱表征RGO粘胶复合织物的表观形态与化学结构,重点研究其导电性、电磁屏蔽性和电加热性能。结果表明:随着涂覆次数从5次增加到15次,复合织物的导电性能和电磁屏蔽性能均得到显著提高;在一定厚度范围内,电磁屏蔽效能与试样厚度呈现正线性相关。在0.15 A恒定电流负载下,复合织物在10 s左右就可达到最高温度164.2℃。认为:该制备方法简单有效,制备的复合织物具有优异的导电性能、电磁屏蔽性能和电加热性能。

The functional modification of viscose nonwovens was realized by coating and impregnation of reduced graphene oxide(RGO).Graphene oxide(GO)was prepared by improved Hummers method.GO viscose composite fabric was prepared by impregnation method.Then,RGO viscose composite fabric was reduced by hydrazine hydrate.The morphology and chemical structure of RGO viscose composite fabric were characterized by scanning electron microscope and Fourier Transform Infrared Spectroscopy.Its conductivity,electromagnetic shielding and electric heating properties were focused and studied.Results showed that the conductivity and the electromagnetic shielding effectiveness of the composite fabric were increased obviously.Within a certain thickness range,there was a positive linear correlation between electromagnetic shielding effectiveness and sample thickness.Under a constant current load of 0.15 A,the composite fabric could reach 164.2℃in 10 s.It is considered that the preparation method in this study is simple and effective,and the prepared composite fabric provides excellent conductivity,electromagnetic shielding performance and electric heating performance.