香蒲衍生Fe/C复合材料的制备及吸波性能  

Cattail-derived Fe/C composites for efficient microwave absorption

作　　者：陈博文 强荣 邵玉龙 杨啸 马茜 薛瑞 CHEN Bowen;QIANG Rong;SHAO Yulong;YANG Xiao;MA Qian;XUE Rui(College of Textiles,Zhongyuan University of Technology,Zhengzhou,Henan 450007,China;Faculty of Engineering,HUANGHE S&T University,Zhengzhou,Henan 450007,China)

机构地区：[1]中原工学院纺织学院,郑州450007 [2]黄河科技学院工学部,河南郑州450007

出　　处：《复合材料学报》2023年第12期6830-6840,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金青年基金(51902359);纺织工业联合会科技指导性项目(2021044);河南省重点研发与推广专项(202102210017);河南省高等学校重点科研项目(20A150047);中原工学院青年骨干教师项目(2020XQG02);中原工学院面上基金项目(K2023MS009);青年硕导培育计划(20232023)。

摘　　要：生物质材料具有特异的微观形态和孔道结构,被认为是碳组分优良的形态遗传材料,且生物质材料来源广泛、价格低廉,亦符合国家可持续发展的战略需求。基于此,本文选取生物质香蒲为主要碳源,Fe3+为金属源,经原位吸附和碳热还原得到碳基底表面均匀负载的Fe纳米粒子(Fe/C复合材料),随着煅烧温度的升高,铁纳米粒子的结晶度增强;Fe/C-700复合材料在低频和高频具有多重共振行为,有助于介电损耗能力的提升;二维反射损耗结果显示,900℃的Fe/C复合材料的吸波性能最好,厚度为5 mm时,4.4 GHz处达到最大反射损耗-35 dB,复合材料优良的吸波性能取决于其较好的阻抗匹配特性和介电损耗与磁损耗的协同作用,本研究将为新型磁性碳基吸波材料的合成提供高效、便捷的合成策略。Biomass materials have specific microscopic morphology and pore structure,which can be considered as excellent morphogenetic materials for carbon components.In addition,biomass materials are widely used,inexpensive and it is in line with the strategic needs of national sustainable development.In the research,we selects biomass cattail as the main carbon source and Fe3+as the metal source.Fe/C composites can be obtained by in situ adsorption and carbon thermal reduction,where Fe nanoparticles are uniformly loaded on the surface of carbon substrate.Moreover,the crystallinity of Fe nanoparticles can be enhanced with the increase of calcination temperature.Fe/C-700 composites have multiple resonance behaviors at low and high frequencies,which contribute to the enhancement of dielectric loss capability.Two-dimensional reflection loss results show that Fe/C-900 composites exhibit the excellent microwave absorption performance,where the minimum reflection loss can reach−35 dB at 4.4 GHz with the thickness of 5 mm.The superior microwave absorption performance can be attributed to its better impedance matching characteristics and the synergistic effect of dielectric loss and magnetic loss,and the study will provide a new strategy for biomass-derived magnetic carbon-based microwave absorption composites.

关 键 词：Fe/C复合材料 生物质 吸波 介电损耗 磁损耗 

分 类 号：TB333[一般工业技术—材料科学与工程]