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首页> 外文期刊>Physica, B. Condensed Matter >γ-MnO_2/polyaniline composites: Preparation, characterization, and applications in microwave absorption
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γ-MnO_2/polyaniline composites: Preparation, characterization, and applications in microwave absorption

机译：γ-MnO_2/聚苯胺复合材料的制备，表征及其在微波吸收中的应用

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摘要

MnO2/doped polyaniline (PANI) is prepared by an in situ polymerization method using γ-MnO_2 as the addition agent and hydrochloric acid as the doping agent. Products are characterized by FT-IR, UVvis, XRD, and TEM. Conductivity, electromagnetic properties, and microwave absorption properties are first discussed on the basis of structural characterization. The as-prepared products of MnO_2/PANI are partially crystalline in nature and spherical in pattern with grain sizes of 5070 nm. MnO_2 particles are successfully decorated with doped PANI. MnO _2/PANI displays moderate electric conduction, excellent dielectric losses, and microwave absorption capabilities. Compared to pure MnO_2, the dielectric and reflection loss properties of MnO_2/PANI composites exhibit significant improvements, with an effective absorption band at 5 GHz under -10 dB and maximum reflection loss of -21 dB at 13.56 GHz. Pure MnO_2 shows an effective absorption band of 3 GHz under -10 dB and a maximum reflection loss of -14.20 dB at 11.5 GHz. Thus, MnO_2/PANI composites are found to be a promising microwave absorption material.
机译：MnO2 /掺杂的聚苯胺（PANI）是通过原位聚合方法制备的，其中使用γ-MnO_2作为加成剂，并使用盐酸作为掺杂剂。产品具有FT-IR，UVvis，XRD和TEM的特征。首先根据结构特征讨论电导率，电磁特性和微波吸收特性。所制备的MnO_2 / PANI的产物在性质上为部分结晶，并且呈球形，晶粒尺寸为5070 nm。 MnO_2颗粒已成功掺杂PANI。 MnO _2 / PANI表现出适度的导电性，出色的介电损耗和微波吸收能力。与纯MnO_2相比，MnO_2 / PANI复合材料的介电和反射损耗性能有了显着改善，在5 GHz下-10 dB时有效吸收带，在13.56 GHz时最大-21 dB反射损耗。纯MnO_2在-10 dB下显示3 GHz的有效吸收带，在11.5 GHz下显示-14.20 dB的最大反射损耗。因此，发现MnO_2 / PANI复合材料是一种很有前途的微波吸收材料。

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