铁氧体、石墨和聚苯胺复合吸波材料的制备及性能研究

发布时间：2018-04-11 23:09

本文选题：吸波材料 + 复合材料　；参考：《安徽工业大学》2016年硕士论文

【摘要】：电气、通讯设备工作时产生的电磁波辐射使电磁污染越来越严重,在此环境下,电磁波吸收材料应运而生。尖晶石型结构铁氧体Mg0.5Zn0.5Fe2O4(MZFO)和Mg0.5Co0.5Fe2O4(MCFO)、石墨以及聚苯胺都是电磁波吸收材料,但是这些材料单独应用时都存在一定限制。为此本文制备三种复合材料,探究成分和比例对复合物各项性能的影响,旨在制备出吸波性能更好的复合材料。采用水热法制备了MZFO、MCFO、复合物MZFO/石墨(MZFO/G)和MCFO/石墨(MCFO/G)。X射线衍射分析仪(XRD)的测试分析结果表明:所有样品均已成功制备。扫描电子显微镜(SEM)的观察结果显示:MZFO/G和MCFO/G中颗粒状的铁氧体与片状的石墨较好地复合在一起。振动样品磁强计(VSM)的测量分析结果表明:随着非磁性石墨的增加,复合物的饱和磁化强度逐渐降低。矢量网络分析仪的测量结果表明:MCFO和MCFO/G比MZFO和MZFO/G的吸波性能好;MZFO/G和MZFO的最大反射损耗峰相同,只是向高频方向移动;而MCFO/G的最大反射损耗峰不但大于MCFO的最大反射损耗峰,而且向高频方向移动,同时随其石墨含量的增加,最大吸收强度不变但是略微向高频方向移动。采用原位聚合法制备了PANI和复合物MCFO/G/PANI。XRD的测量分析结果表明:所有样品均已成功制备。SEM的观察结果显示:随着材料成分的改变,材料的形貌发生变化,当MCFO/G/PANI复合物中PANI的含量较大时,PANI除了包覆在MCFO/G表面,还以片状单独存在。傅氏转换红外线光谱分析仪(FTIR)的测量分析结果表明:MCFO/G/PANI复合物和PANI相比,PANI的特征峰向着高波数方向有着不同程度的移动。矢量网络分析仪的测量结果表明:MCFO/G/PANI复合物的最大反射损耗峰大于MCFO/G的最大反射损耗峰,且向低频方向移动,并且其反射损耗值小于-10 dB的频率范围达到4 GHz,同时随MCFO/G/PANI复合物中PANI含量的增加,其吸收强度增大。
[Abstract]:Electromagnetic wave radiation produced by electrical and communication equipment makes electromagnetic pollution more and more serious. In this environment, electromagnetic wave absorbing materials emerge as the times require.Spinel ferrite Mg0.5Zn0.5Fe2O4 (MZFOO) and Mg0.5Co0.5Fe2O4 (MCFOO), graphite and Polyaniline are all electromagnetic wave absorbing materials, but there are some limitations when these materials are used alone.In this paper, three kinds of composites were prepared, and the effects of composition and proportion on the properties of composites were investigated in order to prepare composites with better absorbing properties.The results of hydrothermal preparation of MCFO, MZFO/ graphite MZFOP / G) and MCFO/ graphite MCFO / MCFO / GX ray diffractometer show that all the samples have been successfully prepared.The results of scanning electron microscopy (SEM) show that the granular ferrite in MCFO/G and the granular ferrite in MCFO/G are well combined with the flake graphite.The measurement and analysis of vibrating sample magnetometer (VSM) show that the saturation magnetization decreases with the increase of non-magnetic graphite.The measurement results of vector network analyzer show that the maximum reflectance loss peak of MCFO and MCFO/G is the same as that of MZFO and MZFO/G, and only moves to high frequency, while the maximum reflection loss peak of MCFO/G is not only larger than that of MCFO, but also the maximum reflectance loss peak of MZFOP-G and MZFO is the same as that of MCFO and MZFO, while the maximum reflection loss peak of MCFO/G is larger than that of MCFO.With the increase of graphite content, the maximum absorption intensity is constant but slightly moves to high frequency direction.The results of measurement and analysis of PANI and composite MCFO/G/PANI.XRD prepared by in-situ polymerization show that all the samples have been successfully prepared. The observation results show that the morphology of the material changes with the change of the composition of the material.When the content of PANI in the MCFO/G/PANI complex is high, the pani also exists in a flake form in addition to coating on the surface of MCFO/G.The results of FTIR analysis show that the characteristic peaks of PANI / MCFO / G / pani complex move towards high wave number in different degrees.The results of the vector network analyzer show that the maximum reflection loss peak of the MCFO / G / pani complex is larger than that of the MCFO/G and moves to the low frequency direction.The reflectance loss is less than -10 dB in the frequency range of 4 GHz, and the absorption intensity increases with the increase of PANI content in the MCFO/G/PANI complex.
【学位授予单位】：安徽工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB34

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