磁性多孔<strong>RGO@Ni</strong>复合材料的制备和吸波性能

doi:10.11901/1005.3093.2020.202

材料研究学报

2020, Vol. 34

Issue (9): 641-649 DOI: 10.11901/1005.3093.2020.202

研究论文

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磁性多孔RGO@Ni复合材料的制备和吸波性能

刘佳良¹, 陈平¹^,²(

), 徐东卫¹, 于祺³

1.大连理工大学化工学院精细化工国家重点实验室大连 116024
2.大连理工大学三束材料改性教育部重点实验室沈阳 116024
3.沈阳航空航天大学辽宁省先进聚合物基复合材料重点实验室沈阳 110136

Preparation and Microwave Absorption Properties of Magnetic Porous RGO@Ni Composites

LIU Jialiang¹, CHEN Ping¹^,²(

), XU Dongwei¹, YU Qi³

1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116024, China
3. Liaoning Key Laboratory of Advanced Polymer Matrix Composites, Shenyang Aerospace University, Shenyang 110136, China

引用本文:

刘佳良, 陈平, 徐东卫, 于祺. 磁性多孔RGO@Ni复合材料的制备和吸波性能[J]. 材料研究学报, 2020, 34(9): 641-649.
Jialiang LIU, Ping CHEN, Dongwei XU, Qi YU. Preparation and Microwave Absorption Properties of Magnetic Porous RGO@Ni Composites[J]. Chinese Journal of Materials Research, 2020, 34(9): 641-649.

全文: PDF(5922 KB) HTML

摘要:

以氧化石墨烯和乙酰丙酮镍为原料，用溶剂热法合成了三维多孔RGO@Ni纳米复合材料。采用X射线衍射(XRD)和X射线光电子能谱(XPS)表征了材料的晶体结构和组成，根据拉曼谱分析了材料内部的石墨化程度和结构缺陷，用扫描电镜(SEM)和透射电镜(TEM)观察了材料的形貌和微观结构。结果表明，当RGO@Ni纳米复合材料的填充量(质量分数)为25%时在最小反射损耗(RL_min)和最大有效吸收带宽(EAB)方面显示出优异的EMW吸收性能；厚度为2.2 mm的RGO@Ni纳米复合材料其RL_min为-61.2 dB，而在2.5 mm匹配厚度下覆盖的EAB范围最广，为6.6 GHz(10.5~17.1 GHz)。这种复合材料优异的微波吸收性能，归因于协同效应的增强和特殊的多孔结构。

关键词 ：复合材料, 电磁波吸收性能, 溶剂热反应, 三维石墨烯, 磁性纳米粒子

Abstract：

An economic and green approach for the controllable synthesis of porous functionalized graphene materials as microwave absorbers was proposed in this paper. POROUS RGO@Ni nanocomposites were synthesized by a simple one-pot method based on solvothermal treatment of Ni(acac)₂ and graphene oxide without adding additional reducing agents. The structure and morphology of the as-prepared hybrid materials were characterized by XRD, Raman spectroscopy, XPS, VSM, SEM and TEM. The results show that uniform Ni spheres of about 900 nm in diameter homogeneously distributed on graphene sheets and form a porous structure. The electromagnetic data demonstrated that RGO@Ni nanocomposites exhibited significantly excellent electromagnetic wave (EMW) absorption properties, probably originating from the unique 3D porous structure and synergistic effect. The minimum reflection loss (RL_min) and maximum effective absorption bandwidth (EAB) of RGO@Ni nanocomposites are -61.2 dB and 6.6 GHz, respectively.

Key words： composite electromagnetic wave absorption performance solvothermal three-dimensional grapheme magnetic nanoparticles

收稿日期: 2020-05-28

ZTFLH:

TB332

基金资助:国家自然科学基金(51303106);大连市科技创新基金重大项目(2019J11CY007);中央高校基本科研基金(DUT20TD207);兴辽英才项目(XLYC1807003);兴辽英才项目(XLYC1802085);三束材料改性教育部重点实验室基金(KF2004)

作者简介: 刘佳良，男，1996年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.202 或 https://www.cjmr.org/CN/Y2020/V34/I9/641

图1 合成多孔磁性RGO@Ni复合材料的示意图

图2 GO、RGO、Ni以及RGO@Ni复合材料的XRD谱图

图3 石墨、GO和RGO@Ni复合材料的拉曼谱图

图4 RGO@Ni的XPS全光谱、RGO@Ni的Ni 2p光谱、RGO@Ni的C 1s频谱以及GO的C 1s光谱

图5 RGO@Ni的SEM照片和TEM照片

图6 Pure Ni、RGO以及RGO@Ni.的三维反射率图像和2.2 mm处Ni、RGO和RGO@Ni的RL值

图7 纯N、纯RGO和RGO@Ni复合材料的介电常数

图8 介电损耗正切、磁损耗正切(tanδμ)、Cole-Cole半圆(ε′对ε″)以及1~18 GHz频率范围的C0值

图9 Ni、RGO和RGO@Ni复合材料的衰减系数和阻抗匹配系数

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