Three dimensional hexagonal boron nitride nanosheet/carbon nanotube composites with light weight and enhanced microwave absorption performance

被引:95
作者
Zhong, Bo [1 ]
Cheng, Yuanjing [1 ]
Wang, Meng [1 ]
Bai, Yongqing [2 ]
Huang, Xiaoxiao [3 ]
Yu, Yuanlie [2 ]
Wang, Huatao [1 ]
Wen, Guangwu [4 ]
机构
[1] Harbin Inst Technol Weihai, Sch Mat Sci & Engn, Weihai 264209, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China
[3] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
[4] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255000, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanocomposites; Hexagonal boron nitride nanosheet/carbon nanotubes; Three dimensional network structures; Microwave absorption; CARBON NANOTUBES; ABSORBING MATERIALS; LIGHTWEIGHT; GRAPHENE; NANOPARTICLES; MICROSPHERES; FABRICATION; DEPOSITION; PARTICLES; NANOWIRES;
D O I
10.1016/j.compositesa.2018.07.009
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Three dimensional hexagonal boron nitride nanosheet decorated carbon nanotube composites (3D h-BNNS/CNTs) have been fabricated through a facile thermal treatment process. h-BNNSs randomly distribute among CNTs to form 3D network structure. The microwave absorption properties of these 3D h-BNNS/CNTs are obviously improved comparing with those of CNTs. And the minimum reflection loss (RL) can reach up to -36.5 dB when the absorber thickness is 2.5 mm for 3D h-BNNS/CNTs1 derived from the precursor with boric acid, urea and CNTs molar ratio of 2:4:1. Besides, the maximum absorption bandwidth (RL <= -10 dB) is as large as 4.0 GHz when the absorber thickness drops to 2.0 mm. More important, h-BNNS/CNTs1 has a low density of 112.6 +/- 3.6 mg/cm(3), which is beneficial for practical applications. The significant enhancement in MA performance of h-BNNS/CNTs is mainly attributed to the improvement of impedance matching, interfacial polarization and multiple scattering after introduction of h-BNNSs.
引用
收藏
页码:515 / 524
页数:10
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