Recent advances in graphene/polyamide 6 composites: a review

Abstract

This paper reviews recent advances in polyamide 6(PA6) nanocomposites with graphene-based fillers including current works using graphite nanoplatelet fillers.Almost all of the latest important publications relating to the preparation, morphology and properties (such as thermal stability, thermal conductivity, electrical conductivity, mechanical property, flame retardant and gas barrier properties) of graphene/PA6 nanocomposites are summarized. An outlook of the current challenges in this field is provided for potential guide progress on the development of graphene/polymer nanocomposites too. Abbreviations: G Graphene GT Graphite GO Graphene oxide FG Functional graphene RGO Reduced graphene oxide EG Exfoliated graphite GTO Graphite oxide GTPS Graphite nanoplatelets GIC Graphene intercalation compounds FGT Flake graphite EGTPS Exfoliated graphite nanoplatelets LTEGT Low-temperature expandable graphite SG Solar graphene CF Carbon fiber GNS Graphene nanosheets MWNT Multi walled carbon nanotubes SMA Styrene-maleic-anhydride MB Master batch THR Total heat release PHRR Peak heat release rate TSP Total smoke production MLG Multi-layer graphene FLG Few-layer graphene SLG Single-layer graphene 1 *Corresponding authors.

Preparation and Characterization of Polyamide‐6/Reduced Graphene Oxide Composite Microspheres

“…Second, compared to dried GO powder, colloidally dispersed GO prevents agglomeration better and has enhanced dispersion within the system when added to the caprolactam (CL) melt . Third, in a range of techniques including melting blending, solvent blending and other methods, in‐situ polymerization of CL offers great superiority in making graphene homogeneously dispersed in the PA6 matrix …”

Preparation and characterization of graphene reinforced PA6 fiber

“…The general methods of graphene/polymer composite fabrication include solvent and melt blending, as well as in situ polymerization, which is similar to other polymer‐based composites . Solution blending is a combination method embodying the mixture of polymer with a liquid phase, providing that it is soluble in that particular solvent; typically employed solvents are water, chloroform, dimethylacetamide, acetone/trifluoroacetic acid mixture, dimethylsulfoxide, and dimethylformamide .…”

“…The introduction of nanofillers contributes to the improvement of the relative properties of composites. Particularly, graphene has attracted much attention as a remarkable agent for enhancing the mechanical properties of composites; a plethora of studies have recently been conducted in this area …”

“…polymerization, which is similar to other polymer-based composites. 23 Solution blending is a combination method embodying the mixture of polymer with a liquid phase, providing that it is soluble in that particular solvent; typically employed solvents are water, chloroform, dimethylacetamide, 24 acetone/trifluoroacetic acid mixture, 25 dimethylsulfoxide, 26 and dimethylformamide. 27 By tailoring certain specific conditions, such as ultrasonic treatment and dispersant addition, graphene can be homogeneously dispersed within the solution.…”

“…Particularly, graphene has attracted much attention as a remarkable agent for enhancing the mechanical properties of composites; a plethora of studies have recently been conducted in this area. 18,20,23 A procedure allowing the introduction of graphene into the PA6 matrix has been established. Nevertheless, the process of fiber formation is distinct from that of plastic molding.…”