Graphene-modified epoxy resin for radome applications

Purpose and goal

This feasibility project aims to verify the concept to develop graphene-modified epoxy resin with improved mechanical properties and radar signal transmission as well as tailored dielectric properties as an advanced matrix in glass fibre reinforced polymer composites for aircraft radomes. The specific goals to process graphene modified epoxy, to characterize its mechanical and electrical properties, and to analyze the potential of the materials and technologies towards aircraft industrial application and commercial production, were reached.

Expected results and effects

Graphene, differing in nanoplatelets dimension and surface functionalization, was incorporated into epoxy resin successfully using different dispersion techniques. It enhanced flexural properties and toughness marginally and modified dielectric properties of resulted epoxy. The maximum content of graphene should be 1 wt% in order to use the modified epoxy for radomes. Properties can be further improved by appropriate functionalization and sufficient dispersion of graphene. The results and conclusions are very interesting and important for continuation of the work.

Planned approach and implementation

SICOMP and INEGI with competence for (nano)composites processing and characterization processed graphene-modified epoxies and measured their mechanical properties. FOI with competence for dielectric characterization measured the electrical properties of resulting materials. GKN-ACAB as a commercial end user for developing and manufacturing radomes evaluated the technical and commercial feasibility of using such modified resins in industrial production and products. Future work to improve modification efficiency and apply results was discussed by all partners.