Noncovalent functionalisation of polyaniline with the ionic liquid: An unneeded asset to prepare the emeraldine salt form of polyaniline using protic ionic liquids as polymerisation medium
Fatima Al-Zohbi
, Fouad Ghamouss, Bruno Schmaltz, Mohamad Fadel Tabcheh, Mohamed Abarbri, Khalil Cherry, Mustapha Zaghrioui, François Tran-Van
, Fouad Ghamouss, Bruno Schmaltz, Mohamad Fadel Tabcheh, Mohamed Abarbri, Khalil Cherry, Mustapha Zaghrioui, François Tran-VanVol. 18., No.9., Pages 901-910, 2024
DOI: 10.3144/expresspolymlett.2024.67
DOI: 10.3144/expresspolymlett.2024.67
Corresponding author: Fatima Al-Zohbi 
GRAPHICAL ABSTRACT
ABSTRACT
Since the properties of polyaniline (PANI) are widely related to the type of its dopant, the present manuscript has an objective to define whether and to what extent the protic ionic liquids contribute to doping PANI. Hence, pyrrolidinium p-toluenesulfonate [Pyrr][PTS] – a protic ionic liquid – has been investigated either as a polymerisation medium or as a secondary dopant. As for the polymerisation medium, it was found that binary mixtures of [Pyrr][PTS]/water, with different weight ratios, are convenient to prepare PANI in emeraldine salt form. Furthermore, the structural analysis of the resulted PANI has revealed that the cation of [Pyrr][PTS] does not functionalise PANI backbone and [Pyrr][PTS] acts like the typical Brřnsted acid in doping PANI, regardless of the amount of [Pyrr][PTS] in the polymerisation medium. To confirm this conclusion, [Pyrr][PTS] has also been studied as a secondary dopant: the conventional PANI has been prepared, deprotonated then dispersed into [Pyrr][PTS]/water with different formulations. The results have shown that [Pyrr][PTS] leads to the formation of reprotonated PANI without altering structural change. One can thus conclude that the noncovalent functionalisation of PANI with the cation of the protic ionic liquids is not an exigent requirement to prepare the emeraldine salt form of PANI in aqueous solutions of protic ionic liquids.
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development of novel materials fosters innovation in the electrical sector. The
hybrid materials based on magnetic nanocellulose are intriguing since they have
many uses in electronics, catalysis, medicine, and ecology. The study
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crystal structure of the synthesized composite. To ascertain the variation in
the component concentrations, scanning electron microscope (SEM) and
energy-dispersive X-ray analysis (EDAX) are used. Composite with a higher
concentration of nanocellulose fibers (NCF) show lesser particle size, and this
may account for the smaller size of nanocellulose fibers, and attachment of
nanocellulose nanofibers over the surface of porous cobalt ferrite (CF) found in
SEM images.
