Electro-Thermal Parameters of Graphene Nano-Platelets Films for De-Icing Applications

Abstract

This paper provides a study of some relevant electro-thermal properties of commercial films made by pressed graphene nano-platelets (GNPs), in view of their use as heating elements in innovative de-icing systems for aerospace applications. The equivalent electrical resistivity and thermal emissivity were studied, by means of models and experimental characterization. Macroscopic strips with a length on the order of tens of centimeters were analyzed, either made by pure GNPs or by composite mixtures of GNPs and a small percentage of polymeric binders. Analytical models are derived and experimentally validated. The thermal response of these graphene films when acting as a heating element is studied and discussed.

Characterization of the thermal conductivity and diffusivity of graphene nanoplatelets strips: a low-cost technique

“…Note that the solution of model (2)-(3) required a preliminary estimation of the emissivity ε of the tested strips. This was carried out according to the procedure described in [26] and also applied in [27]. Specifically, the emissivity was identified by varying its value until an agreement was reached between the temperature values measured by the IR camera and those given by the contact thermocouples placed on the surface of the strip.…”

“…The measurement procedure to impose (7) was carried on until steady conditions were almost reached (at least ten minutes in the present study). Note that the dependence on T of the electrical resistance ΔR n of the nth sub-strip was estimated on the basis of the procedure reported in [27,39].…”

“…In [26,27] these materials have been studied and it has been assessed a technique to evaluate their temperaturedependent electrical conductivity and their thermal emissivity. In this paper, the study is extended to the thermal conductivity and to the thermal diffusivity in order to give a complete analysis and characterization of these GNP-based strips.…”

A Tri-Layer Structural Film Containing Nickel Nanocoating for Electromagnetic Transmittance and Joule Heating

“…Electrically heated films composed of electromagnetic shielding materials such as MXenes and graphene are commonly employed to address deicing issues. − However, MXenes are relatively expensive, rendering them unsuitable for large-scale application. Traditional graphene electric heating films, characterized by their minimal mass (with film thicknesses attainable down to the order of tens of micrometers) and superior heating efficiency, are prevalently employed for deicing applications. − Nonetheless, this methodology predominantly relinquishes electromagnetic wave transmission capabilities to secure effective deicing outcomes. , Frequency Selective Surfaces (FSSs) have been extensively applied in the realm of wave-transmissive materials in recent years. , Through intricate pattern design that leverages their selective transmission properties, films with both heating and wave-transmission capabilities can be fabricated. However, an optimal electrical conductivity is a requisite for FSSs, whereas excessive conductivity in electric heating materials is typically undesirable.…”

A Capacitive Ice-Sensor Based on Graphene Nano-Platelets Strips

“…This would allow the use of such techniques for aircraft applications, where they are not currently used, due to the impact of the conventional heaters, in terms of weight for instance. The authors have investigated the electrothermal properties of graphene strips which may be proposed as heating elements for de-icing systems [ 29 , 30 , 31 ]. Similar results have recently been assessed in the literature [ 32 , 33 ].…”