The effects of annealing temperature on the permittivity and electromagnetic attenuation performance of reduced graphene oxide
The effects of annealing temperature on the permittivity and electromagnetic attenuation performance of reduced graphene oxide
复制标题
退火温度对还原氧化石墨烯介电常数和电磁衰减性能的影响
DOI：
10.1063/1.5028472
复制
发表时间：
2018-05-07
影响因子：
4
通讯作者：
Xie, Aming
中科院分区：
文献类型：
--
作者：
Wu, Fan;Zeng, Qiao;Xie, Aming
采用热还原法制备了不同退火温度的还原氧化石墨烯（RGO），探讨了温度对RGO介电常数和电磁衰减性能的影响。介电常数的真实的和虚部随着含氧官能团的减少和填料负载率的增加而沿着增加。仅负载lwt.在300 ℃下还原2 h，RGO的有效吸收带宽为7.60GHz.随着退火温度增加到700 ° C并且充分还原的RGO负载7 wt.在2 ~ 18 GHz频率范围内，复合材料的电磁干扰屏蔽效率可达35 dB以上。本研究表明，控制RGO表面的含氧官能团也可以获得理想的电磁衰减性能，而无需任何其他纳米材料的修饰。由AIP出版社出版。
Reduced graphene oxide (RGO) has been prepared through the thermal reduction method with different annealing temperatures to explore the effects of temperature on the permittivity and electromagnetic attenuation performance. The real and imaginary parts of permittivity increase along with the decrease in the oxygen functional group and the increase in the filler loading ratio. A composite only loaded with 1 wt. % of RGO can possess an effective electromagnetic absorption bandwidth of 7.60 GHz, when graphene oxide was reduced under 300 degrees C for 2 h. With the annealing temperature increased to 700 degrees C and the well reduced RGO loaded 7 wt. % in the composite, the electromagnetic interference shielding efficiency can get higher than 35 dB from 2 to 18 GHz. This study shows that controlling the oxygen functional groups on the RGO surface can also obtain an ideal electromagnetic attenuation performance without any other decorated nanomaterials. Published by AIP Publishing.