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Expanded graphite/cobalt ferrite/polyaniline ternary composites: Fabrication, properties, and potential applications

  • Liangchao Li (a1), Chen Xiang (a1), Haisheng Qian (a1), Bin Hao (a1), Keyu Chen (a1) and Ru Qiao (a1)...


Expanded graphite/cobalt ferrite/polyaniline (EG/CF/PANI) ternary composites were obtained by a two-step process. The intercalation compound, CF embedded in EG, was synthesized by a coprecipitation method. PANI could then be coated on the surface of the EG/CF microparticles by in-situ polymerization to form ternary composites of EG/CF/PANI. The results indicate that the electrical and magnetic performance of EG/CF and EG/CF/PANI composites are related to their composition. The EG/CF composite with mass ratio of 1.0 has the maximal conductivity (833.33 S·cm−1) among the binary composites. Saturation magnetizations (Ms) of the EG/CF composite with mEG/mCF of 0.8 is the largest among EG/CF composites, the ternary composites of EG/CF/PANI were prepared from the EG/CF composite at this mass ratio. The electromagnetic wave absorbing property of all ternary composites excelled those of EG/CF composites, and the sample with 40 wt% of PANI has the best absorption properties in the range of 8–18 GHz frequency.


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1.Meshram, M.R., Agrawal, N.K., Sinha, B., and Misra, P.S.: Characterization of M-type barium hexagonal ferrite-based wide band microwave absorber. J. Magn. Magn. Mater. 271, 207 (2004).
2.Feng, Y.B., Qiu, T., Shen, C.Y., and Li, X.Y.: Electromagnetic and absorption properties of carbonyl iron/rubber radar absorbing materials. IEEE Trans. Magn. 42, 363 (2006).
3.Mo, Z.L., Sun, Y.X., Chen, H., Zhang, P., Zuo, D.D., and Liu, Y.Z.: Preparation and characterization of a PMMA/Ce(OH)(3), Pr2O3/graphite nanosheet composite. Polymer 46, 12670 (2005).
4.Mo, Z.L., Zuo, D.D., Chen, H., Sun, Y.X., and Zhang, P.: Synthesis of graphite nanosheets/AgCl/polypyrrole composites via two-step inverse microemulsion method. Eur. Polym. J. 43, 300 (2007).
5.Wang, S., Bao, H.M., Yang, P.Y., and Chen, G.: Immobilization of trypsin in polyaniline-coated nano-Fe3O4/carbon nanotube composite for protein digestion. Anal. Chim. Acta. 612, 182 (2008).
6.Zhang, B.S., Feng, Y., Xiong, J., Yang, Y., and Lu, H.X.: Microwave-absorbing properties of De-aggregated flake-shaped carbonyl-iron particle composites at 2-18 GHz. IEEE Trans. Magn. 42, 1778 (2006).
7.Lima, R.D.C., Pinho, M.S., and Gregori, M.L., ReisNunes, C., and Ogasawara, T.: Effect of double substituted m-barium hexaferrites on microwave absorption properties. Mater. Sci. 22, 245 (2004).
8.Park, M.J., Choi, J.H., and Kim, S.S.: Wide bandwidth pyramidal absorbers of granular ferrite and carbonyl iron powders. IEEE Trans. Magn. 36, 3272 (2000).
9.Xie, G.W., Wang, Z.B., Cui, Z.L., and Shi, Y.L.: Ni-Fe-Co-P coatings on coiled carbon nanofibers. Carbon 43, 3181 (2005).
10.Fan, Y.Z., Yang, H.B., Li, M.H., and Zou, G.T.: Evaluation of the microwave absorption property of flake graphite. Mater. Chem. Phys. 115, 696 (2009).
11.Li, L.C., Jiang, J., and Xu, F.: Novel polyaniline-LiNi0.5La0.02Fe1.98O4 nanocomposites prepared via an in situ polymerization. Eur. Polym. J. 42, 2221 (2006).
12.Li, L.C., Xiang, C., Liang, X.I., and Hao, B.: Zn0.6Cu0.4Cr0.5Fe1.46Sm0.04O4 ferrite and its nanocomposites with polyaniline and polypyrrole: Preparation and electromagnetic properties. Synth. Met. 160, 28 (2010).
13.Yang, X.T., Xu, L.G., Ng, S.C., and Chan, S.O.H.: Magnetic and electrical properties of polypyrrole-coated γ-Fe2O3 nanocomposite particles. Nanotechnology 14, 624 (2003).
14.Liu, J. and Wan, M.X.: Composites of polypyrrole with conducting and ferromagnetic behaviors. J. Polym. Sci., Part A: Polym. Chem. 38, 2734 (2000).
15.Wu, K.H., Ting, T.H., Wang, G.P., Yang, C.C., and Tsai, C.W.: Synthesis and microwave electromagnetic characteristics of bamboo charcoal/polyaniline composites in 2-40 GHz. Synth. Met. 158, 688 (2008).
16.Micheli, D., Apollo, C., Pastore, R., and Marchetti, M.: X-band microwave characterization of carbon-based nanocomposite material, absorption capability comparison and RAS design simulation. Compos. Sci. Technol. 70, 400 (2010).
17.Ting, T.H., Wu, K.H., Wang, G.P., Ho, W.D., and Shih, C.C.: Effect of carbon black content on electrical and microwave absorbing properties of polyaniline/carbon black nanocomposites. Polym. Degrad. Stab. 93, 483 (2008).
18.Feng, W., Sun, E., Fujii, A., Wu, H.C., Niihara, K., and Yoshino, K.: Synthesis and characterization of photoconducting polyaniline-TiO2 nanocomposite. Bull. Chem. Soc. Jpn. 73, 2627 (2000).
19.Kinlen, P.J., Liu, J., Ding, Y., Graham, C.R., and Remsen, E.E.: Emulsion polymerization process for organically soluble and electrically conducting polyaniline. Macromolecules 31, 1735 (1998).
20.Sauzedde, F., Elaissari, A., and Pichot, C.: Hydrophilic magnetic polymer latexes. 1. Adsorption of magnetic iron oxide nanoparticles onto various cationic latexes. Colloid Polym. Sci. 277, 846 (1999).
21.Stauffer, D.: Scaling theory of percolation clusters. Phys. Rep. 54, 1 (1979).
22.Sauzedde, F., Elaïssari, A., and Pichot, C.: Hydrophilic magnetic polymer latexes. 2. Encapsulation of adsorbed iron oxide nanoparticles. Colloid Polym. Sci. 277, 1041 (1999).
23.Wei, J., Liu, J.H., and Li, S.M.: Electromagnetic and microwave absorption properties of Fe3O4 magnetic films plated on hollow glass spheres. J. Magn. Magn. Mater. 312, 414 (2007).
24.Ni, S.B., Wang, X.H., Zhou, G., Yang, F., Wang, J.M., and He, D.Y.: Size controlled and morphology tuned fabrication of Fe3O4 nanocrystals and their magnetic properties. J. Alloy. Comp. 489, 252 (2010).
25.Xu, P., Han, X., Jiang, J., Wang, X., Li, X., and Wen, A.: Synthesis and characterization of novel coralloid polyaniline/BaFe12O19 nanocomposites. J. Phys. Chem. C 111, 12603 (2007).
26.Xu, P., Han, X., Wang, C., Zhou, D., Lv, Z., Wen, A., Wang, X., and Zhang, B.: Synthesis of electromagnetic functionalized nickel/polypyrrole core/shell composites. J. Phys. Chem. B 112, 10443 (2008).
27.Kwon, H.J., Shin, J.Y., and Oh, J.H.: The microwave absorbing and resonance phenomena of Y-type hexagonal ferrite microwave absorbers. J. Appl. Phys. 75, 6109 (1994).
28.Stafström, S., Brédas, J.L., Epstein, A.J., Woo, H.S., Tanner, D.B., Huang, W.S., and MacDiarmid, A.G.: Polaron lattice in highly conducting polyaniline: Theoretical and optical studies. Phys. Rev. Lett. 59, 1464 (1987).
29.Zuo, F., Angelopoulos, M., MacDiarmid, A.G., and Epstein, A.J.: AC conductivity of emeraldine polymer. Phys. Rev. B 39, 3570 (1989).



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