Preparation of a superior intense, lightweight, affordable, broadband microwave-absorbing nanocomposite by PUF/PANi
Preparation of a superior intense, lightweight, affordable, broadband microwave-absorbing nanocomposite by PUF/PANi
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DOI：
10.1088/2053-1591/ab2793
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发表时间：
2019-06
影响因子：
2.3
通讯作者：
Reza Peymanfar;Shahrzad Javanshir;M. Naimi-Jamal;A. Cheldavi
中科院分区：
文献类型：
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作者：
Reza Peymanfar;Shahrzad Javanshir;M. Naimi-Jamal;A. Cheldavi
在这项研究中，一个简单的，重量轻，宽带微波吸收纳米复合材料的制备。采用改进的声化学技术快速合成了掺杂聚苯胺（PANi），并将其与聚氨酯泡沫（PUF）复合。采用漫反射光谱（DRS）、矢量网络分析仪（VNA）、傅里叶变换红外光谱（FT-IR）、元素图谱分析、场发射扫描电子显微镜（FE-SEM）、振动样品磁强计（VSM）、四探针电导仪（FPPC）和X射线粉末衍射（XRD）对聚苯胺纳米结构和PUF/聚苯胺纳米复合材料进行了表征。所有的结果证实，制备的PANi纳米结构具有适当的尺寸和晶体结构以及高电导率（449.51 S cm-1）。所应用的方法导致制备PANi/PUF纳米复合材料，由于它们的化学耦合以及包括π-π堆积的静电相互作用。根据VNA结果，PUF吸收大于x和ku波段的带宽>10 dB，而其最大反射损耗在13.18 GHz时为−58.76 dB，厚度为2.8 mm。泡沫在9.21 GHz时吸收89.80 dB的微波，厚度为4.0 mm，而PUF/PANi 50重量%的最大反射损耗在10.22 GHz下为84.90 dB，带宽为5.1 GHz>复合材料在13.86 GHz处的吸收为69.20 dB，在8.2-18 GHz之间的吸收为9.35 GHz >10 dB，吸收范围为沿着。
In this study, a simple, lightweight, and broadband microwave-absorbing nanocomposite was prepared. Accordingly, a doped polyaniline (PANi) was quickly synthesized with a modified sonochemical technique and then composited with a polyurethane foam (PUF). The PANi nanostructure and the PUF/PANi nanocomposite were characterized using the diffuse reflection spectroscopy (DRS), vector network analyzer (VNA), Fourier transform infrared (FT-IR), elemental mapping analysis, field emission scanning electron microscopy (FE-SEM), vibrating sample magnetometer (VSM), four-point probe conductometer (FPPC), and x-ray powder diffraction (XRD) analysis. All the results confirmed that the PANi nanostructure was prepared with the appropriate size and crystalline structure as well as a high electrical conductivity (449.51 S cm−1). The applied methods led to preparation of PANi/PUF nanocomposite due to their chemical coupling as well as electrostatic interactions including π–π stacking. According to the VNA results, the PUF absorbed a bandwidth greater than the x and ku-band>10 dB, while its maximum reflection loss was −58.76 dB at 13.18 GHz with a thickness of 2.8 mm. The foam absorbed 89.80 dB of microwaves at 9.21 GHz with 4.0 mm in thickness, while the maximum reflection loss of the PUF/PANi 50 wt% was 84.90 dB at 10.22 GHz with a 5.1 GHz bandwidth >10 dB and a thickness of 3.5 mm. The composite absorbed 69.20 dB at 13.86 GHz at 2.5 mm thickness and absorbed 9.35 GHz >10 dB along the 8.2–18 GHz.