Effect of carbon black content on the microwave absorbing properties of CB/epoxy composites

Document Type : Research Paper

Authors

1 Department of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran

2 Malek-Ashtar University of Technology, Tehran, Iran

10.7508/jns.2016.02.006

Abstract

To prevent serious electromagnetic interference, a single-layer and double layer wave-absorbing coating employing complex absorbents composed of carbon black with epoxy resin as matrix was prepared. The morphologies of carbon black /epoxy composites were characterized by scanning electron microscope  and atomic force microscope, respectively. The carbon black  particles exhibit obvious polyaromatic were characterized by X-ray diffraction. The electromagnetic parameters of carbon black  were measured in the frequency range of 8–12 GHz by transmission/reflection technology, and the electromagnetic loss mechanisms of the two particles were discussed, respectively. The microwave absorption properties of the coatings were investigated by measuring reflection loss  using arch method. The effects of carbon black  mass ratio, thickness and double-layer on the microwave absorption properties were discussed, respectively. The results showed that the higher thickness, higher ratio and double-layer of carbon black /epoxy content could make the absorption band shift towards the lower frequency range. Significantly, the wave-absorbing coating could be applied in different frequency ranges according to actual demand by controlling the content of carbon black  in composites.

Keywords


[1] Mu G, Shen H, Qiu J, Gu M. Microwave absorption properties of composite powders with low density. Appl. Surf. Sci. 2006; 253(4): 2278-81.
[2] Ma Z, Wang J, Liu Q, Yuan J. Microwave absorption of electroless Ni–Co–P-coated SiO 2 powder. Appl. Surf. Sci. 2009; 255(13): 6629-33.
[3] Liu Y, Feng Y, Wu X, Han X. Microwave absorption properties of La doped barium titanate in X-band. J. Alloys Compd.. 2009; 472(1): 441-5.
[4] Liu Y, Zhang Z, Xiao S, Qiang C, Tian L, Xu J. Preparation and properties of cobalt oxides coated carbon fibers as microwave-absorbing materials. Appl. Surf. Sci. 2011; 257(17): 7678-83.
[5] Ghasemi A, Hossienpour A, Morisako A, Saatchi A, Salehi M. Electromagnetic properties and microwave absorbing characteristics of doped barium hexaferrite. J. Magn. Magn. Mater. 2006; 302(2): 429-35.
[6] Liu L, Duan Y, Ma L, Liu S, Yu Z. Microwave absorption properties of a wave-absorbing coating employing carbonyl-iron powder and carbon black. Appl. Surf. Sci. 2010; 257(3): 842-6.
[7] Nanni F, Travaglia P, Valentini M. Effect of carbon nanofibres dispersion on the microwave absorbing properties of CNF/epoxy composites. Compos. Sci. Technol. 2009; 69(3): 485-90.
[8] Zhao N, Zou T, Shi C, Li J, Guo W. Microwave absorbing properties of activated carbon-fiber felt screens (vertical-arranged carbon fibers)/epoxy resin composites. Mater. Sci. Eng., B 2006; 127(2): 207-11.
[9] Zhao DL, Chi WD, Shen ZM, editors. Preparation of carbon nanotube reinforced epoxy resin coating and its microwave characteristics. Key Eng. Mater; 2007: Trans Tech Publ.
[10] Xie W, Cheng H, Chu Z, Chen Z, Long C. Effect of carbonization temperature on the structure and microwave absorbing properties of hollow carbon fibres. Ceram. Int. 2011; 37(6): 1947-51.
[11] Lin H, Zhu H, Guo H, Yu L. Investigation of the microwave-absorbing properties of Fe-filled carbon nanotubes. Mater. Lett. 2007; 61(16): 3547-50.
[12] Fan Z, Luo G, Zhang Z, Zhou L, Wei F. Electromagnetic and microwave absorbing properties of multi-walled carbon nanotubes/polymer composites. Mater. Sci. Eng., B. 2006; 132(1): 85-9.
[13] Chin WS. Development of the composite RAS (radar absorbing structure) for the X-band frequency range. Compos. Struct. 2007; 77(4): 457-65.
[14] Neo C, Varadan VK. Optimization of carbon fiber composite for microwave absorber. Electromagnetic Compatibility, IEEE Transactions on. 2004; 46(1): 102-6.
[15] Su C-I, Li J-Y, Wang C-L. Absorption characteristics of phenolic-based carbon fiber absorbents. Text. rese. j. 2005; 75(2): 154-6.
[16] Shen G, Xu M, Xu Z. Double-layer microwave absorber based on ferrite and short carbon fiber composites. Mater. Chem. Phys. 2007; 105(2): 268-72.
[17] Li Y, Chen C, Pan X, Ni Y, Zhang S, Huang J, et al. Multiband microwave absorption films based on defective multiwalled carbon nanotubes added carbonyl iron/acrylic resin. Phys B: Cond. Matt. 2009; 404(8): 1343-6.
[18] Anagnostou MN, Anagnostou EN, Krajewski W. High-resolution rainfall rate and DSD estimation from X-band polarimetric radar measurements. Bulletin of the American Meteorological Society, Seattle, WA Berlin: America Meteorologi Soci. 2004: 599-608.
[19] Joon AS, Seung-Ho A, Ho AS, Aikio J, Liu A, Akage Y, et al. 2004 Index IEEE Photonics Technology Letters Vol. 16.
[20] Decaesteke T, Villard M, Bois J, Laforge E, Chaubet M, Huguet P. X-band high PAE MMIC HPA for space radar applications. 1996.
[21] Tibbetts GG, Lake ML, Strong KL, Rice BP. A review of the fabrication and properties of vapor-grown carbon nanofiber/polymer composites. Compos. Sci. Technol. 2007; 67(7): 1709-18.
[22] Thostenson ET, Chou T-W. Aligned multi-walled carbon nanotube-reinforced composites: processing and mechanical characterization. J. Phys. D: Appl. Phys. 2002; 35(16): L77.
[23] Saltysiak B, Johnson W, Kumar S, Zeng J, editors. Nanofiber reinforcement of PMMA—the hope and the reality. Proc 17th ASC Conf, West Lafayette; 2002.
[24] Xia H, Wang Q. Ultrasonic irradiation: a novel approach to prepare conductive polyaniline/nanocrystalline titanium oxide composites. Chem. Mater. 2002; 14(5): 2158-65.
[25] Vinoy KJ, Jha RM. Radar absorbing materials- From theory to design and characterization(Book). Boston, MA: Kluwer Academic Publishers, 1996.
[26] Bai X, Zhai Y, Zhang Y. Green approach to prepare graphene-based composites with high microwave absorption capacity. J. Phys. Chem. A. 2011; 115(23): 11673-7.
[27] Maeda T, Sugimoto S, Kagotani T, Tezuka N, Inomata K. Effect of the soft/hard exchange interaction on natural resonance frequency and electromagnetic wave absorption of the rare earth–iron–boron compounds. J. Magn. Magn. Mater. 2004; 281(2): 195-205.
[28] De Bellis G, De Rosa I, Dinescu A, Sarto M, Tamburrano A, editors. Electromagnetic absorbing nanocomposites including carbon fibers, nanotubes and graphene nanoplatelets. Electromagnetic Compatibility (EMC), 2010 IEEE International Symposium on; 2010: IEEE.
[29] De Rosa IM, Dinescu A, Sarasini F, Sarto MS, Tamburrano A. Effect of short carbon fibers and MWCNTs on microwave absorbing properties of polyester composites containing nickel-coated carbon fibers. Compos. Sci. Technol. 2010; 70(1): 102-9