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Citation: XIONG Dong-Bai, YANG Chun-Ming. Preparation and Microwave-absorbing Properties of Poly(aniline-co-pyrrole)Copolymer/Fe₃O₄ Network Nanofiber Composites[J]. Chinese Journal of Applied Chemistry, ;2009, 26(9): 1054-1059. shu

Preparation and Microwave-absorbing Properties of Poly(aniline-co-pyrrole)Copolymer/Fe₃O₄ Network Nanofiber Composites

XIONG Dong-Bai ,
YANG Chun-Ming ^,

1.
College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081

Corresponding author: YANG Chun-Ming,
Received Date: 1 September 2008
Available Online: 10 December 2008
Fund Project: 湖南省自然科学基金(06JJ4007) (06JJ4007)湖南省教育厅(06C511)资助项目 (06C511)

PAn-co-PPy/Fe₃O₄ network nanofiber composites were synthesized in Fe₃O₄ magnetic fluid by in situ chemical oxidative co-polymerization of aniline(An) and pyrrole(Py) monomers in the presence of cetyltrimethylammoniun bromide(CTAB).It was found that the morphology structures and electromagnetic properties of the nanocomposites can be tuned by varying the concentration of CTAB,the molar ratio of An/Py and the amount of Fe₃O₄ used.The resulting products were characterized by SEM,TEM,XRD,FT-IR,TG and the measurements of their electrical conductivities and hysteresis loops.The complex permittivity and permeability of samples were measured on a vector network analyzer in a range of 2~18 GHz,from which the reflection loss(R) curves of microwave vs frequency were calculated.The results show that the PAn-co-PPy/Fe₃O₄ nanocomposites take on a regular network nanofiber structure when the concentration of CTAB is 42 mmol/L,and the saturated magnetization is 14.8 emu/g when the content of Fe₃O₄ in the composite is 22.1%.XRD patterns confirmed the nanocomposite was composed of the Fe₃O₄ nanoparticles and PAn-PPy co-polymers.FT-IR spectra demonstrate the main characteristic absorption peaks corresponding to both PAn and PPy have red-shifted for the PAn-co-PPy/Fe₃O₄ nanocomposites.The PAn-co-PPy/Fe₃O₄ nanocomposites exhibit better microwave-absorbing properties than PAn,PPy,PAn-co-PPy,PAn/Fe₃O₄ or PPy/Fe₃O₄ composites,and it had a maximum reflection loss of-36.5 dB at 9.0 GHz with about 4.7 GHz bandwidth above-10 dB when the content of Fe₃O₄ in the composite was 12.4%.
- (PAn-co-PPy) polymer,
- ferroferric oxide,
- nanofiber composite,
- microwave-absorbing properties
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Preparation and Microwave-absorbing Properties of Poly(aniline-co-pyrrole)Copolymer/Fe3O4 Network Nanofiber Composites

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Preparation and Microwave-absorbing Properties of Poly(aniline-co-pyrrole)Copolymer/Fe₃O₄ Network Nanofiber Composites