RGO/ANFs复合气凝胶的制备及电磁屏蔽性能  

Preparation of RGO/ANFs composite aerogels and their electromagnetic shielding performance

作　　者：谢璠 高坤 卓龙海 陈珊珊 贾峰峰 陆赵情 刘成 XIE Fan;GAO Kun;ZHUO Longhai;CHEN Shanshan;JIA Fengfeng;LU Zhaoqing;LIU Cheng(College of Bioresources Chemical and Materials Engineering,Shaanxi Province Key Laboratory of Paper-Making Technology and Specialty Paper,National Demonstration Center for Experimental Light Chemistry Engineering Education,Key Laboratory of Paper Based Functional Materials of China National Light Industry,Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;Jiangsu Aosheng Composite Materials Hi-Tech Co.,Ltd.,Suzhou 215200,Jiangsu,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西省造纸技术及特种纸品开发重点实验室,轻化工程国家级实验教学示范中心,中国轻工业纸基功能材料重点实验室,陕西省轻化工助剂化学与技术协同创新中心,陕西西安710021 [2]江苏澳盛复合材料科技有限公司,江苏苏州215200

出　　处：《精细化工》2022年第4期697-705,共9页Fine Chemicals

基　　金：国家自然科学基金青年基金(52003145);陕西省教育厅重点科学研究计划(21JY003);陕西省重点研发计划(2021ZDLGY14-05)。

摘　　要：通过化学水热还原法制备了还原氧化石墨烯(RGO),将其引入到去质子化法制备的芳纶纳米纤维(ANFs)基体中,采用冷冻干燥法制备了可压缩回弹、高效电磁屏蔽性能的RGO/ANFs复合气凝胶。采用SEM、TEM、四探针测试仪、伺服材料多功能高低温控制试验机和矢量网络分析仪考察了不同RGO添加量对RGO/ANFs复合气凝胶的微观形貌、导电性能、力学性能和电磁屏蔽性能的影响。结果表明,当RGO添加量为25%(以ANFs质量为基准,下同)时,制备的复合气凝胶的电导率达到23.62S/cm,总电磁屏蔽损耗达到25.70dB,压缩应变为0.7时,压缩应力可达100k Pa。RGO/ANFs复合气凝胶自身的多孔结构与RGO良好的导电性能共同赋予其优异的电磁屏蔽性能。RGO/ANFs composite aerogels with compressible resilience and high electromagnetic shielding performance were prepared by freeze-drying method by introducing reduced graphene oxide(RGO)prepared by chemical hydrothermal reduction method into aramid nanofibers(ANFs) prepared by chemical deprotonation method. The effects of different amounts of RGO on the microstructure, electrical conductivity, mechanical properties and electromagnetic shielding performance of RGO/ANFs composite aerogel were investigated by SEM, TEM, four-probe tester, servo material multifunctional high and low temperature control testing machine and vector network analyzer. The results showed that when the additive amount of RGO was 25%(based on the mass of ANFs, the same below), the electrical conductivity and electromagnetic shielding efficiency of the prepared RGO/ANFs composite aerogel were 23.62 S/cm and 25.70 dB, respectively. The compressive stress at 0.7 compression strain could reach 100 kPa. RGO/ANFs composite aerogel had excellent electromagnetic shielding performance due to its porous structure and good electrical conductivity of RGO.

关 键 词：还原氧化石墨烯 芳纶纳米纤维 气凝胶 电磁屏蔽 压缩回弹性 功能材料 

分 类 号：TS711[轻工技术与工程—制浆造纸工程] O648.17[理学—物理化学]