再生纤维素基三明治结构复合薄膜的电磁屏蔽性能  

Electromagnetic Interference Shielding Properties of Regenerated Cellulose Matrix Composite Films with Sandwich Structure

作　　者：张婷 吴翠玲[1,2] 籍冰晗[1,2] 韩梦瑶 杜雪岩 ZHANG Ting;WU Cuiling;JI Binghan;HAN Mengyao;DU Xueyan(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050

出　　处：《材料导报》2025年第2期239-244,共6页Materials Reports

基　　金：国家自然科学基金-联合基金项目(U22A20175)。

摘　　要：电磁辐射污染在工业、民用及军事等领域日趋严重,高性能的电磁干扰(Electromagnetic interference,EMI)屏蔽材料成为当前研究热点。以再生纤维素(Regenerated cellulose,RC)为基体,石墨烯(Graphene,GE)为导电填料,纳米Fe_(3)O_(4)为磁性填料,采用沉浸相转化法和压制成型法制备了三明治结构GE/RC-Fe_(3)O_(4)/RC-GE/RC复合薄膜。研究了GE含量和薄膜厚度对复合薄膜EMI屏蔽性能的影响,探讨了其屏蔽机制。结果表明,随着GE含量和薄膜厚度的增大,复合薄膜的电导率和EMI屏蔽性能逐渐提高。当GE含量为20%(质量分数,如无特殊说明,下同)、薄膜厚度为0.84 mm时,复合薄膜的EMI屏蔽效能(Shielding effectiveness,SE)达到24.7 dB。同时,GE的添加增强了复合薄膜的拉伸强度,其最大值为12.2 MPa。本研究为绿色纤维素基电磁屏蔽复合薄膜的构筑提供了借鉴。Electromagnetic radiation pollution has become increasingly serious in the electronic,industrial,civil and military fields.High-performance electromagnetic interference(EMI)shielding films have recently become popular research topics.In this work,the sandwich-structured graphene(GE)/regenerated cellulose(RC)-Fe_(3)O_(4)/RC-GE/RC composite films were fabricated by immersed phase transformation and compression molding methods using RC as matrix,GE as conductive filler and nano Fe_(3)O_(4)as magnetic filler.The influence of GE contents and the thicknesses on the EMI shielding properties of the composite films were studied,and their shielding mechanism was discussed.The results showed that the conductivity and EMI shielding effectiveness(SE)were enhanced by both the increase of GE content and the film thickness.The EMI SE of the composite films reached the maximum 24.7 dB at the GE content of 20%and the film thickness of 0.84 mm.Meanwhile,the tensile strength of the composite film was enhanced by the addition of GE,with a maximum value of 12.2 MPa.This study provides a feasible strategy to prepare cellulose-based composite films for electromagnetic shielding.

关 键 词：再生纤维素 三明治结构复合薄膜 电磁屏蔽 石墨烯 纳米Fe_(3)O_(4) 

分 类 号：TB332[一般工业技术—材料科学与工程]