Ion-exchange functionalized polystyrene-based composites: synthesis, conductive hybridization, and environmental applications

Polystyrene is the oldest and most widely used synthetic polymer, and it is divided into two main types: expanded polystyrene (EPS) and general-purpose polystyrene (GPPS). This versatile material is used in various commercial applications. One of the challenges with polystyrene is its hydrophilicity, which can be addressed through functionalization, enhancing its overall properties. Polystyrene-based resins have significant advantages over natural organic ion exchangers. These resins, when incorporated into nanocomposites, demonstrate excellent reshaping and performance in ion exchange (IEX) materials, particularly for water treatment applications. The combination of IEX with nanomaterials has the potential to further improve effectiveness. Low-dimensional carbon materials, including carbon nanotubes, graphene derivatives, metal oxides, and silica, exhibit potential for improving the properties of ion exchange materials at the laboratory scale. This study reviews recent advancements in polystyrene copolymerization, the use of nanofillers, and the integration of polymeric and superconducting additives to improve functional performance. In addition, it offers a systematic evaluation of existing constraints techniques in polystyrene-based ion-exchange nanocomposites for environmental applications. Several factors characterise conductive and superconductive materials. Organic polymer matrices with superconducting nanoparticles form superconductive polymeric nanocomposites. Electrical impedance and diamagnetic response are the main superconducting tests for these materials. Polystyrene composites' superconductivity comes from ceramic superconductor particles, not the polymer. Interfacial interactions and conduction processes among filler particles affect their performance. This review emphasizes the production of polystyrene-based nanocomposites and their potential as advanced adsorbents while identifying research gaps and key findings in the field.