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Synthesis of daisy-shaped core–shell nanocomposites of chiral poly[(±)-2-(sec-butyl)aniline] in the solid state

  • Ali Reza Modarresi-Alam
  • Abdolkarim Farrokhzadeh
  • Sahar Shabzendedar
  • Naeem Sedighi-Darijani
Original Research
  • 9 Downloads

Abstract

A green and simple procedure is reported on the synthesis of a daisy-like core–shell nanocomposite of chiral poly[(±)-2-(sec-butyl)aniline]/nanosilica. This morphology is related to the use of nanosilica and a mechanism based on intermolecular interactions between particles of nanosilica and the polymer. The morphology of the samples and their coating were investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), SEM-map and energy-dispersive X-ray spectroscopy (EDX). The outstanding feature of this study is that it presents the first report of an in situ formation of daisy-like morphology for polyaniline nanocomposites through one-pot route without using pre-functionalized nanosilica and any other template under the solid-state condition; while this polymer has displayed no specific morphology under most conditions. According to XPS and CHNS analysis, the nigraniline oxidation state was confirmed as well as fully doping of composites (around 75%) in contrast with partial doping of poly[(±)-2-(sec-butyl)aniline].HCl salt. The structure of nanosilica was studied by 29Si NMR. The sample showed a conductivity around 5.2 × 10−2 S/cm, consistent with the XPS results which revealed the doping level. In addition, the TLM measurement was applied to determine the contact resistance. In this study, a chiral conductive nanocomposite was prepared under a solid-state condition in compliance with the green chemistry principles. Moreover, it was found that the nanocomposite is in delocalized polaron structure using solid acid as a dopant. Additionally, from the industrial point of view, the processability has been improved due to the introduction of the 2-sec-butyl group within the polymer backbone.

Keyword

Chiral conducting nanocomposite Core–shell Daisy like Poly[(±)-2-(sec-butyl)aniline] Nanosilica-supported perchloric acid Solid state 

Notes

Acknowledgements

The authors acknowledge the Iran National Science Foundation (INSF) (The Office of President, Vice-Presidency for Science and Technology) and the Graduate Council of University of Sistan and Baluchestan for their financial support.

Supplementary material

13726_2018_679_MOESM1_ESM.docx (1 mb)
Supplementary material 1 (DOCX 1028 KB)

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Copyright information

© Iran Polymer and Petrochemical Institute 2018

Authors and Affiliations

  1. 1.Organic and Polymer Research Laboratory, Department of Chemistry, Faculty of Science, and Renewable Energies Research InstituteUniversity of Sistan and BaluchestanZahedanIran
  2. 2.Molecular Bio-computation and Drug Design Laboratory, School of Health SciencesUniversity of KwaZulu-NatalDurbanSouth Africa

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