摘要
以碳纤维为导电骨架、芳纶沉析纤维为辅助成形浆料、碳化硅为介电损耗填料,通过抄纸、干燥、浸渍等工艺制得碳纤维/芳纶/碳化硅电磁屏蔽复合纸;通过微机控制电子万能试验机、网络分析矢量仪、扫描电子显微镜对所制备复合纸的力学性能、电磁屏蔽性能、纸张结构进行了表征和分析。结果表明:当芳纶沉析纤维质量分数由20%提升至60%时,复合纸中碳化硅留着率由1.1%提升至67.9%,最大拉伸应力从1.5 MPa增至10.5 MPa,X波段最高电磁屏蔽效能从58 dB降至42 dB;经固含量为20%的酚醛树脂/碳化硅混合液浸渍处理,当碳化硅加入量为4 g,树脂浸渍复合纸在X波段最高电磁屏蔽效能达92.4 dB,最大拉伸应力为13.7 MPa,大于未经树脂浸渍的复合纸。
With carbon fiber as conductive skeleton,aramid fibrid as auxiliary forming slurry,and silicon carbide as dielectric loss filler,carbon fiber/aramid fibrid/silicon carbide electromagnetic shielding composite paper was prepared through paper making,drying and impregnation processes.The mechanical properties,electromagnetic shielding properties and paper structure of the composite paper were characterized and analyzed with a microcomputer controlled electronic universal testing machine,a network analysis vector instrument and a scanning electron microscope.The results showed that the retention of silicon carbide in composite paper was increased from 1.1%to 67.9%,the maximum tensile stress was increased from 1.5 MPa to 10.5 MPa,and the electromagnetic shielding effectiveness in X-band was reduced from 58 dB to 42 dB when the mass fraction of aramid fibrid was increased from 20%to 60%;and the resin impregnated composite paper had the maximum electromagnetic shielding effectiveness of 92.4 dB in X-band and the maximum tensile stress of 13.7 MPa,greater than those of non-impregnated composite paper,when the composite paper was impregnated in a phenolic resin/silicon carbide mixed solution with a solid content of 20%and silicon carbide content of 4 g.
作者
董佳玥
贾峰峰
郭子瞻
代曦怡
刘远清
徐明源
陆赵情
DONG Jiayue;JIA Fengfeng;GUO Zizhan;DAI Xiyi;LIU Yuanqing;XU Mingyuan;LU Zhaoqing(Shaanxi Province Key Laboratory of Papermaking Technology and Special Paper Products Development,College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi′an 710021)
出处
《合成纤维工业》
CAS
2022年第6期14-18,共5页
China Synthetic Fiber Industry
基金
陕西省教育厅重点项目(20JY002)
国家自然科学基金项目(22178211)
西安市科技计划项目(2019220114SYS016CG038)
陕西省重点研发计划项目(2021ZDLGY14-05)
浙江省重点研发计划项目(2019C04008)。
关键词
芳纶沉析纤维
碳纤维
碳化硅
复合纸
电磁屏蔽效能
力学性能
aramid fibrid
carbon fiber
silicon carbide
composite paper
electromagnetic shielding
mechanical properties
