Synthesis of Various Polyaniline / Clay Nanocomposites Derived from Aniline and Substituted Aniline Derivatives by Mechanochemical Intercalation Method

Abstract

Polyaniline clay nanocomposite can be prepared by mechano-chemical method in which intercalation of anilinium ion into the clay lattices accomplished by mechanical grinding of sodium montmorillonite (Na+MMT) in presence of anilinium hydrochloride at room temperature using mortar & pestle for about 30 min and subsequent grinding with oxidizing agent, ammonium peroxysulfate. The appearance of green colour indicates the formation of polyaniline/clay nanocomposite (PANI/Clay). Similarly aniline derivatives likeo-toludine ando-anisidine in the form of HCl salt can form intercalation into the clay lattices. The intercalated aniline derivatives were ground mechanically in presence of oxidizing agent ammonium peroxysulfate lead to formation of substituted polyaniline/ clay nanocomposites. The characteristics of various polyaniline-clay nanocomposites were investigated using UV-Visible, FT-IR, cyclic voltammetry studies.

Mechanochemical Synthesis of Polyanilines and Their Nanocomposites: A Critical Review

“…In all cases, the thermal stability improves, and, in the case of PANI(p-TSO-)/MT [ 127 ], electronic conductivities of up to 0.01 S/cm are obtained. Kalaivasan et al applied the same procedure to the synthesis of nanocomposites of MT with Ani, oTOL, and oAS [ 129 ]. The EPR studies indicate radical cations are present in the three NCs.…”

Polyaniline Nanostructures: Techniques in Structure-Tailored Polymerisation-Superstructures

“…The monomer is still aniline, which in an acidic medium, is protonated and becomes anilinium ion. The molecules used in aqueous medium help align the anilinium ion just before oxidising agent can activate the process of oxidative polymerisation [8,67,68]. The process can be understood in Figure 4.…”