Preparation of rGO/PVA/CIP composites and their microwave absorption properties
Preparation of rGO/PVA/CIP composites and their microwave absorption properties
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DOI：
10.1016/j.jmmm.2018.11.129
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发表时间：
2019-06
影响因子：
2.7
通讯作者：
Z. Qi;Liu Chunbo;W. Zhuang;Yang Yang-Yang;X. Zhiyong;Zhou Haikun;Chen Chudong
中科院分区：
文献类型：
--
作者：
Z. Qi;Liu Chunbo;W. Zhuang;Yang Yang-Yang;X. Zhiyong;Zhou Haikun;Chen Chudong
设计新型结构以优化介电常数和磁导率是提高吸波材料性能的有效途径。首先在羰基铁粉（CIP）表面沉积含有均匀分布的氧化石墨烯（GO）的PVA涂层，然后对其进行热处理，得到rGO/PVA/CIP复合材料。在2.0-18.0 GHz频率范围内，研究了rGO/PVA/CIP复合材料的电磁参数（相对复介电常数和磁导率）及其损耗机理。结果表明，在不牺牲磁损耗的前提下，rGO的分散性可以有效地提高复合材料的介电损耗和微波吸收性能。含有1 mg/g GO的PVA/CIP复合物的有效吸收宽度（反射损耗低于-10dB）被测量为1.88GHz。
Designing novel structure to optimize the dielectric constant and permeability was believed as an effective way to improve the performances of wave-absorbing material. In this work, PVA coating containing homogeneously-distributed graphene oxide (GO) was firstly deposited onto the surface of carbonyl iron powder (CIP), which was then followed by a heat-treatment to obtain rGO/PVA/CIP composite materials. The electromagnetic parameters (relative complex permittivity and permeability) and corresponding loss mechanism of the as-prepared rGO/PVA/CIP composites were investigated in a frequency of 2.0–18.0 GHz. It was found that the presence of well-dispersed rGO could effectively improve the dielectric loss of the composites and microwave absorption capability without sacrificing magnetic loss. The effective absorbing width (reflection loss lower than −10 dB) of PVA/CIP composite containing 1 mg/g GO was measured to be ∼8.4 GHz.