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Synthesis and characterization of nanocomposite of polythiophene with Na2[Fe(CN)3(OH)(NO)C6H12N4] H2O: a potent material for EMI shielding applications

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Abstract

Nanocomposite of polythiophene (PTh) with the photoadduct of sodium pentacyanonitrosylferrate(II) dihydrate and hexamine is synthesized by In-situ polymerization technique. Photoadduct was obtained by photoirradiation followed by substitution with hexamine ligand using Osram UV–visible photo lamp which was proved by Elemental analysis, UV–Vis, and FTIR. From elemental analysis, the empirical formula assigned to the synthesized photoadduct was found to be Na2[Fe(CN)3(OH)(NO)C6H12N4] H2O. Synthesized photoadduct was then milled in high energy ball mill to reduce it to nano size, which was confirmed from XRD and TEM. SEM analysis revealed distinct morphological features of photoadduct, PTh and nanocomposite. XRD showed orthorhombic structure of photoadduct which was retained in nanocomposite. Grain size (D) and strain (ε) has been evaluated by fitting different models which were nearly well correlated. TEM measurement clearly showed the polymer coating of photoadduct particles which explained the size increase from photoadduct to nanocomposite. TG revealed higher thermal stability of nanocomposite as compared to pure PTh. DSC exhibits increase in the glass transition temperature of nanocomposite which indicated its rigid nature. A cyclic nanoindentation load-depth curve is used to assess mechanical properties. Dielectric measurement shows high value of dielectric constant (ε′) and ac-conductivity (σac = 1010 S/m) which can make it useful for EMI shielding applications.

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Acknowledgments

The authors are grateful to Department of Science and Technology, Government of India for financial assistance to carry out this research work under research project No: (SR/NM/NS-97/2008). The authors are also grateful to Prof Rajat Gupta, Director, NIT Srinagar for help and support.

Conflict of interest

There is no conflict of interest between authors and the organizations in which the present work has been carried out.

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Authors and Affiliations

  1. Department of Chemistry, National Institute of Technology, Srinagar, 190 006, JK, India

    Mohd. Hanief Najar & Kowsar Majid

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  1. Mohd. Hanief Najar
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  2. Kowsar Majid
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Correspondence to Mohd. Hanief Najar or Kowsar Majid.

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Najar, M.H., Majid, K. Synthesis and characterization of nanocomposite of polythiophene with Na2[Fe(CN)3(OH)(NO)C6H12N4] H2O: a potent material for EMI shielding applications. J Mater Sci: Mater Electron 26, 6458–6470 (2015). https://doi.org/10.1007/s10854-015-3237-3

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  • DOI: https://doi.org/10.1007/s10854-015-3237-3

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