石墨烯/纳米铜复合材料的制备及红外性能研究

采用原位还原法制备了还原石墨烯/纳米铜复合材料, 对其进行表征分析.测量该材料的中远红外波段的复折射率, 计算其吸收系数和大气窗口内的法向光谱发射率并进行实验验证, 进而分析其在中远红外波段的吸收和辐射性能.结果表明, 纳米铜吸附在还原石墨烯表面, 粒径集中在15~25 nm; 不同尺寸的纳米铜、还原石墨烯及其表面缺陷和官能团等的吸收特性, 使该复合材料在8~9.2 μm、6~6.5 μm、2~3 μm波段内的吸收较强, 且在远红外波段吸收最强; 其在3~5 μm的法向发射率在0.65~0.68范围内, 法向发射率在8~9.5 μm内有最小值0.53, 而后稳定在0.58左右, 其总法向发射率分别为0.66和0.59, 且与测量值相符.该复合材料可用于红外吸收、消光材料和隐身涂料等方面.

Abstract

The reduced graphene oxide/nano-copper composites were prepared by using in-situ reduction method and characterized. The complex refractive index of the composites in middle and far infrared band were measured, and its absorption coefficient and normal spectral emissivity in the atmospheric window were calculated and verified by experiment, along with the analysis of its absorption and radiance performance in middle and far infrared. The results show that nano-coppers are adsorbed on the surface of reduced graphene oxide, and its size almost concentrate in 15~25 nm. Due to the different sizes of nano-copper, and reduced graphene oxide together with its surface defects and functional groups, the composites have a strong absorption performance in 8~9.2 μm, 6~6.5 μm, 2~3 μm. Its normal spectral emissivity in 3~5 μm is within 0.65~0.68, but it has a minimum value of 0.53 in 8~9.5 μm, and then stabilize at about 0.58. Their total normal emissivity is 0.66 and 0.59 respectively, which are consistent with the experiment. The composites can be used for infrared absorption, extinction materials and stealthy coatings.

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马德跃, 王成名, 李晓霞, 郭宇翔, 曾宇润. 石墨烯/纳米铜复合材料的制备及红外性能研究[J]. 光子学报, 2018, 47(3): 0316002. MA De-yue, WANG Cheng-ming, LI Xiao-xia, GUO Yu-xiang, ZENG Yu-run. Research on Preparation and Infrared Property of Graphene and Nano-copper Composites[J]. ACTA PHOTONICA SINICA, 2018, 47(3): 0316002.

石墨烯/纳米铜复合材料的制备及红外性能研究

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