Novel conducting nanocomposite based on polypyrrole and modified poly(styrene‐alt‐maleic anhydride) via emulsion polymerization: Synthesis, Characterization, Antioxidant, and heavy metal sorbent activity

Abstract

Novel polypyrrole/modified poly(styrene-alt-maleic anhydride) conducting nanocomposites were prepared via emulsion polymerization using sodium dodecyl sulfate as an emulsifier and ammonium persulfate as an oxidant. Modified poly(styrene-alt-maleic anhydride) was used as an external dopant for conductivity enhancement of polypyrrole. The conductivity of nanocomposites was measured with a four-probe method. The maximum electrical conductivity of the nanocomposite was 1.40 S/cm. The data from this research showed that the novel nanocomposite presents good tendency for the removal of heavy metal ions from aqueous solutions. Also the prepared nanocomposites were analyzed for their antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl assay. The results showed that the antioxidant activity of the nanocomposite was 60%. The nanocomposites were characterized by Fourier transform infrared, ultraviolet-visible, X-ray diffraction, field emission scanning electron microscopy, and differential scanning calorimetry measurements. POLYM. COMPOS., 36:138-144,

ZnO-based materials and enzymes hybrid systems as highly efficient catalysts for recalcitrant pollutants abatement

“…This copolymer has low toxicity, its production is relatively cost effective and it is completely biocompatible [21]. For these reasons, SMA copolymers have been exploited as surface active agents, microbicides, external dopant, drug carriers, and excellent sorbents for the removal of heavy metal ions [22,23]. The reactive groups on the surface of SMA make it possible to attach the enzymes thus obtaining hybrid materials [16].…”

Structure and dynamics of polypyrrole/chitosan nanocomposites

“…Furthermore, nanostructured conducting PPy exhibits new improved properties related to the nanoscale size, such as electrical conductivity, larger surface area and superior electrochemical activity, which make it suitable for different applications compared with the respective bulk . Apart from these outstanding features, the poor processability excludes neat PPy from being employed in a wide range of biological applications …”

“…14 Apart from these outstanding features, the poor processability excludes neat PPy from being employed in a wide range of biological applications. 15,16 One way to satisfy the requirement in this particular aspect as well as to compensate for the shortcomings is to incorporate nanostructured PPy with other polymers from natural or synthetic sources to synthesize polymer nanocomposites that combine the positive qualities of both materials. Dispersion of nanostructured PPy such as nanotubes, nanoparticles, nanofibers, etc., in various matrices proves to be an effective way to improve the possibility and the processability of these polymers.…”

Electroconductive multi-functional polypyrrole composites for biomedical applications

“…Large dopants are easier to be incorporated into the polypyrrole chains and do not leach out as easily over time or by the application of an electrical stimulus. They, therefore, enhance the electrochemical stability of the synthesized polypyrrole [46] . The electrical conductivity of polypyrrole is within the range of 7.5 −10 × 10 3 S cm −1 depending on the type and amount of dopant [40] .…”