Exfoliated clay/polyaniline nanocomposites through tandem diazonium cation exchange reactions and in situ oxidative polymerization of aniline

Abstract

Exfoliated, conductive clay/polyaniline nanocomposites were prepared by polymerization of aniline in the presence of diazonium cation exchanged bentonite.

Functionalization of nanomaterials with aryldiazonium salts

“…In the second approach, Salmi et al [34] proposed to intercalate the clay by exchanging The intercalation of clays by diazonium compounds was further explored by Jlassi et al [180] to exchange sodium by diazotized diphenylamine (DPA) in order to prepare exfoliated clay/PANI nanocomposites. The intercalation of diazonium cations increased the interlamellar spacing and facilitated the in situ oxidative polymerization of aniline which resulted in exfoliation of the clay.…”

Anti-corrosive and oil sensitive coatings based on epoxy/polyaniline/magnetite-clay composites through diazonium interfacial chemistry

“…The B-DPA-PANI nanocomposites clay/polyaniline were prepared as function of the cation exchange capacity (CEC) 18 by polymerization of aniline on the 4-diphenylamino diazonium-exchanged clay as active platform. The B-DPA-PANI@Fe 3 O 4 hybrid magnetite filler were prepared with reference to mechanochemical synthesis process 65 .…”

“…Surface pre-modification is a main key to designing new materials from bentonite. There are various processes of modifications; Using silane-coupling agents 14 , mediating the hydroxyl groups of bentonite located on the sheet, the cation exchange method 15 , or, more recently, the covalent modification using diazonium salts 16 , which produces new interfaces between clay filler and different polymers like poly(methacrylates) 17 and conductive polymers 18 . Among those polymers, polyaniline is well known as one of the best conducting polymers due to its easy preparation, important electrical and sensing properties 19 , 20 .…”

Preparation, Characterization, and Application of Polyacrylamide‐Polystyrene/Bentonite Nanocomposite as an Effective Immobilizing Adsorbent for Remediation of Soil

“…Also, releasing the organic species, which are immobilized on hybrid adsorbents, make such contaminants . An acceptable alternative material to organosilane compounds or bridged organosilane compounds in functionalizing the surfaces of inorganic compounds is polymers . These compounds have different functional groups and because of having a large molecular weight and a large number of functional groups, they play an important role in absorbing heavy metal elements .…”