Enhanced electromagnetic wave absorption of engineered epoxy nanocomposites with the assistance of polyaniline fillers
Enhanced electromagnetic wave absorption of engineered epoxy nanocomposites with the assistance of polyaniline fillers
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DOI：
10.1007/s42114-022-00417-2
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发表时间：
2022-01-12
影响因子：
20.1
通讯作者：
Guo, Zhanhu
中科院分区：
文献类型：
--
作者：
Guo, Jiang;Chen, Zhuoran;Guo, Zhanhu
在这项工作中，工程聚苯胺（PANI）/环氧树脂复合材料增强与PANI-M（物理混合物的聚苯胺球和纤维）表现出显着提高电磁波吸收性能和力学性能。由于不同几何形状的聚苯胺填料的协同效应，10. 0 wt% PANI-M/epoxy复合材料在17.7GHz处的反射损耗可达-36.8dB。同时，对PANI/环氧树脂复合材料的力学性能（拉伸强度、韧性和弯曲强度）进行了系统的研究。与纯环氧树脂相比，PANI-M质量分数为2.0%的环氧树脂的拉伸强度提高到86.2MPa。采用化学氧化聚合法和界面聚合法分别制备了聚苯胺微球（PANI-S）和聚苯胺纤维（PANI-F）。采用扫描电镜、傅里叶变换红外光谱、X射线衍射等表征手段对PANI填料的形貌、化学结构和晶体结构进行了分析。该研究为制备用于电磁波污染治理的先进工程化环氧纳米复合材料提供了指导。
In this work, the engineered polyaniline (PANI)/epoxy composites reinforced with PANI-M (physical mixture of PANI spheres and fibers) exhibit significantly enhanced electromagnetic wave absorption performance and mechanical property. Due to the synergistic effect of PANI fillers with different geometries, the reflection loss of 10.0 wt% PANI-M/epoxy could reach - 36.8 dB at 17.7 GHz. Meanwhile, the mechanical properties ( including tensile strength, toughness, and flexural strength) of PANI/epoxy were systematically studied. Compared with pure epoxy, the tensile strength of epoxy with 2.0 wt% PANI-M was improved to 86.2 MPa. Moreover, the PANI spheres (PANI-S) and PANI fibers (PANI-F) were prepared by the chemical oxidation polymerization method and interface polymerization method, respectively. The characterizations including scanning electron microscope, Fourier transform infrared spectra, and X-ray diffraction were applied to analyze the morphology and chemical and crystal structures of PANI filler. This work could provide the guideline for the preparation of advanced engineered epoxy nanocomposites for electromagnetic wave pollution treatment.