电纺碳纳米纤维/石墨烯气凝胶薄膜的可控制备与电磁屏蔽性能研究

doi:10.11896/cldb.22090180

材料导报

2023, Vol. 37

Issue (24): 22090180-5 https://doi.org/10.11896/cldb.22090180

无机非金属及其复合材料

电纺碳纳米纤维/石墨烯气凝胶薄膜的可控制备与电磁屏蔽性能研究

付宁宁¹, 谢绍兴¹, 周禄军¹, 丁亚萍¹, 孟凡彬^2,3,*

1 中车南京浦镇车辆有限公司,南京 210031
2 西南交通大学材料科学与工程学院,材料先进技术教育部重点实验室,成都 610031
3 西南交通大学深圳学院,广东深圳 518000

Controllable Preparation of Electrospun Carbon Fibers/Graphene Films and Their Electromagnetic Interference Shielding

FU Ningning¹, XIE Shaoxing¹, ZHOU Lujun¹, DING Yaping¹, MENG Fanbin^2,3,*

1 CRRC Nanjing Puzhen Co., Ltd., Nanjing Jiangsu Province, Nanjing 210031, China
2 Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
3 Shenzhen Institute of Southwest Jiaotong University, Shenzhen 518000, Guangdong, China

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摘要随着信息技术的迅猛发展,高功率电子设备包括卫星通信、宽带雷达、无线网络和便携式数字硬件等在医疗卫生、电子安全和国防安全领域广泛应用,电磁干扰、辐射污染以及信息泄露等问题则随之产生。目前,如何制备具有优异力学性能、电导率和电磁屏蔽性能的石墨烯基薄膜材料仍然是一个巨大的挑战。因此,本工作以氧化石墨烯(Graphene oxide,GO)水溶液和电纺碱处理聚丙烯腈(Alkali-treated polyacrylonitrile,aPAN)纳米纤维为原料,通过水热还原和冷冻干燥得到气凝胶,进一步通过预氧化和高温退火处理获得碳纳米纤维增强的石墨烯气凝胶(GCA),并通过液压机压制得到石墨烯基气凝胶薄膜,系统研究了薄膜的电导率、电磁屏蔽和光热转化性能。结果表明,在加入碳纳米纤维后,GCA膜的电导率可以提升至20.5 S/cm。对于电磁屏蔽性能,可从73.7 dB(GA)增加到78.8 dB(GCA-10),且气凝胶膜的整体屏蔽效果可以达到99.999 995%以上。此外,该气凝胶膜还呈现出优异的光热转化性能,有望应用于光吸收和原油传输等领域。

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关键词: 石墨烯电纺碳纳米纤维多孔结构电磁屏蔽屏蔽机理

Abstract: With the rapid development of information technology, high-power electronic equipment including satellite communications, broadband radar, wireless networks and portable digital hardware are widely used in medical, health, electronic security and national defense security, the electromagnetic interference, radiation pollution and information leakage problems have followed. At present, how to prepare graphene-based thin film materials with excellent mechanical properties, electrical conductivity and electromagnetic shielding properties is still a huge challenge. In this work, we adopted a facile and effective method by annealing the alkali-treated polyacrylonitrile (aPAN) nanofibers reinforced graphene oxide (GO) composite films to obtain carbon nanofiber-reinforced graphene aerogel (GCA). The conductivity, electromagnetic shielding and photothermal conversion properties of the thin film were systematically studied. The results show that after the addition of carbon nanofibers, the conductivity of the GCA membrane can be increased to 20.5 S/cm. For electromagnetic shielding performance, it can be increased from 73.7 dB (GA) to 78.8 dB (GCA-10), and the overall shielding effectiveness (SE) of aerogel film can reach more than 99.999 995%. In addition, the aerogel film also exhibits excellent photothermal conversion properties, which is expected to be applied to the fields such as light absorption and crude oil transmission.

Key words: graphene electrospun carbon nanofiber porous structure electromagnetic shielding property electromagnetic shielding mec-hanism

发布日期: 2023-12-19

ZTFLH:

TB34

基金资助: 中央引导地方科技发展资金—深圳虚拟大学园自由探索类基础研究项目(2021Szvup124)

通讯作者: *孟凡彬,西南交通大学材料科学与工程学院教授。2008年于聊城大学获得学士学位,2014年毕业于电子科技大学材料科学与工程专业,获得博士学位。2015年进入西南交通大学材料科学与工程学院工作。现任材料科学与工程学院高分子系系主任、高分子党支部书记。主要从事电磁防护材料设计、制备及电磁学相关机理研究。近年来,发表 SCI 论文70余篇,申请发明专利17项,主持国家自然科学基金(面上、青年)、军委科技委、装备发展部、四川省科技支撑计划(重点研发、国际合作)等纵横向项目20余项。mengfanbin@swjtu.edu.cn

作者简介: 付宁宁,高级工程师,硕士,2008年获得聊城大学学士学位,2011年毕业于大连交通大学材料加工工程专业,获硕士学位,主要从事轨道交通车辆制造相关工作,先后主持中车重点研发项目5项,获得省部级奖项3项,授权发明专利9项,发表核心期刊论文16篇。

引用本文:

付宁宁, 谢绍兴, 周禄军, 丁亚萍, 孟凡彬. 电纺碳纳米纤维/石墨烯气凝胶薄膜的可控制备与电磁屏蔽性能研究[J]. 材料导报, 2023, 37(24): 22090180-5.
FU Ningning, XIE Shaoxing, ZHOU Lujun, DING Yaping, MENG Fanbin. Controllable Preparation of Electrospun Carbon Fibers/Graphene Films and Their Electromagnetic Interference Shielding. Materials Reports, 2023, 37(24): 22090180-5.

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http://www.mater-rep.com/CN/10.11896/cldb.22090180 或 http://www.mater-rep.com/CN/Y2023/V37/I24/22090180

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