摘要
研究报告了一种受生物启发的螺旋碳纤维低成本、无催化剂的制备方法,即以茶叶体内天然螺纹导管结构为模板,通过高温碳化获得螺旋碳纤维(SCFs)材料。并且通过KOH活化造孔,获得了具有高比表面积(1923.56 m^(2)/g)和高孔容(1.06 cm^(3)/g)的多孔活性螺旋碳纤维(ASCFs)材料。微波吸收测试结果显示活化后的PASCFs材料具备更高的介电损耗和良好的阻抗匹配性,体现出优异的微波吸收性能。在材料含量为10 wt%,匹配厚度为3.53 mm时,ASCFs在电磁频率7.3 GHz下的反射损耗(RL)高达-38.18 dB,比活化前SCFs的最大反射损耗(RL)提高了近13倍。
This paper reports a bio-inspired,low-cost,and catalyst-free method for preparing spiral carbon fibers(SCFs)by the high-temperature carbonization and using the natural spiral vessel structure as the template.The porous active spiral carbon fibers(PASCFs)with a high specific surface area(1923.56 m^(2)/g)and high pore volume(1.06 cm^(3)/g)were further obtained by KOH activation.Microwave absorption test results show that the activated PASCFS material has a higher dielectric loss and good impedance matching than SCFs,and presents an excellent microwave absorption performance.When the load of PASCFs was 10 wt%,the reflection loss(RL)of ASCFs was up to 38.18 dB at 7.3 GHz and 3.53 mm thickness,which is nearly 13 times higher than the maximum reflection loss(RL)of SCFs.
作者
曹奇益
刘兴龙
祝淑媛
文亚东
王志俊
孙宇峰
陶锋
CAO Qiyi;LIU Xinglong;ZHU Shuyuan;WEN Yadong;WANG Zhijun;SUN Yufeng;TAO Feng(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Provincial Laborateory of High Performance Nonferrous Metals Material,Wuhu 241000,China)
出处
《安徽工程大学学报》
CAS
2021年第2期8-18,共11页
Journal of Anhui Polytechnic University
基金
安徽高校自然科学研究重大基金资助项目(KZ2020ZD37)
安徽省自然科学基金资助项目(2008085ME131)
安徽工程大学校级科研基金资助项目(XJKY019201909)。
关键词
生物质
螺旋碳纤维
微孔结构
吸波性能
biomass
spiral carbon fibers
microporous structure
microwave absorption