Structural and thermal characterization of poly(2‐chloroaniline)/red mud nanocomposite materials

Abstract

ABSTRACT:We report the synthesis and characterization of a series of conducting poly(2-chloroaniline) (P2ClAn)/red mud (RM) nanocomposite materials. The polymerization of 2-chloroaniline in an aqueous medium in the presence of (NH 4 ) 2 S 2 O 8 and RM resulted in the formation of a nanocomposite (P2ClAn/RM). The extent of P2ClAn loading in the composites increased with increasing oxidant and monomer concentrations but decreased with RM. The properties of the nanocomposites were characterized with Fourier transform infrared (FTIR), ultraviolet-visible (UV-vis), conductivity measurements, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry analysis. The inclusion of P2ClAn in the composites was confirmed by FTIR studies. The UV-vis spectra of P2ClAn/RM nanocomposites were similar to that of P2ClAn. The conductivity changed in all the composites prepared under various conditions. Thermogravimetric analyses revealed the enhanced thermal stabilities of the nanocomposites with respect to P2ClAn. Morphological images of the as-synthesized materials were also investigated with scanning electron microscopy and environmental scanning electron microscopy.

Composites of poly(2‐chloroaniline) and poly(o‐toluidine) with pumice and their application in the removal of chromium(VI) ions from aqueous solutions

“…P2ClAn, POT, and their composites exhibited decomposition in one step. This weight loss was possibly due to a large thermal degradation of the PAn chain 34. Endothermic peaks in the DTA curve of the samples supported decompositions belonging to the thermogravimetric (TG) results.…”

“…SEM micrographs of P2ClAn, POT, P2ClAn/Pmc, and POT/Pmc are given in Figure 4(a–d). P2ClAn exhibited a big globular structure unlike P2ClAn synthesized in the presence of HCl 34. However, POT had smaller particles than P2ClAn [Fig.…”

“…The Freundlich equation indicated the adsorptive capacity on the POT/Pmc and P2ClAn/Pmc composites. The empirical Freundlich equation based on sorption on a heterogeneous surface is given below:34 The Freundlich equation is expressed linearly as The K f , the sorption capacity and n values, the sorption intensity, as calculated from Figure 8 for POT/Pmc were found to be 0.584 mmol/g and 3.920, respectively (Table II). The P2ClAn/Pmc composite had K f and n values of 4.959 mmol/g and 1.146, respectively.…”

Effect of material parameters on the mechanical properties of chemically treated red mud HDPE composites

“…The use of reinforced nano-composites has shown improvement in mechanical properties, transport barrier, thermal resistivity, and flame-retardance, in comparison with pristine polymer materials. 10–12 In both nano-composites and macro-fabricated composites, mechanical properties are enhanced by the dispersion of particles such as aluminium oxides, metal carbides, titanium oxides and boron and carbide into the matrices.…”