Multifunctional Composite Structures through Graphene (MULTIGRAPH)

Important results from the project

The aim of the project was to identify a strategy for production of multifunctional graphene enhanced carbon fibre reinforced plastics and to demonstrate its effect on the material properties. We have by a combination of experimental studies, simulations and modelling shown that addition of small amounts of graphene (0.5-3%) into epoxy based composite gives an improved strength along with improved electrical conductivity and reduced moist absorption.

Expected long term effects

The increased conductivity has the potential to reduce the need for the heavy, metallic lightning strike protections used today in the aeronautical industry. The enhanced strength along with the reduced moist absorption also enables a less over conservative design. When implemented in an aircraft structure this novel material would reduce the weight of the aircraft and thereby the fuel consumption which in turn reduces the CO2 emission.

Approach and implementation

The work has been performed in an iterative process where simulations, models and experimental work has worked as an input to each other. Dispersion techniques has been identified through experimental testing. The following micrographs obtained from mixtures has been used to establish a model for prediction of variations in stiffness and electrical conductivity. The identified dispersion techniques has been used for processing of laminates for mechanical testing and lightning strike protection.