Thermal and Electromagnetic Properties of Polymer Holey Structures Produced by Additive Manufacturing

Abstract

Multifunctional 3D-printed holey structures made of composite polymers loaded with nanocarbon were designed to serve simultaneously as GHz-radiation absorbing layers and heat conductors. The geometry of the structures was devised to allow heat to be easily transferred through, with special attention paid to thermal conductivity. Numerical calculations and a simple homogenization theory were conducted in parallel to address this property. Different structures have been considered and compared. The electromagnetic shielding effectiveness of the produced holey structures was measured in the microwave range.

Experimental, Theoretical and Numerical Studies on Thermal Properties of Lightweight 3D Printed Graphene-Based Discs with Designed Ad Hoc Air Cavities

“…The results agree with a numerical calculation of the thermal conductivity of nanocomposite including a fluid (air) in volumetric proportion ϕ and 1-ϕ, respectively [43]. In our case, the nanocomposite has thermal conductivity κ m (0.…”

“…Kochetov et al have proposed a model specifically designed for the thermal conductivity of the polymer nanocomposites which simultaneously accounts for the physical properties of the polymer matrix, the nanofiller and their interfacial interaction [ 49 ]. Lambin et al have presented numerical calculations and an efficient homogenization theory to evaluate the thermal properties of 3D printed multifunctional structures with holes made of composite polymers filled with nanocarbon particles [ 43 ]. Vega-Flick et al have presented a review of recent studies of thermal transport in nano-structured materials including methodologies and analysis of measurements errors [ 50 ].…”

Advanced Dual−Function Hollow Copper−Sulfide−Based Polyimide Composite Window Film Combining Near−Infrared Thermal Shielding and Organic Pollutants’ Photodegradation

“…In comparison to other components, the thermal capability of glazed components of buildings is far poorer; as much as 50% of the total energy is lost or gained through windows with poor thermal shielding or insulation, which is expected to continue to dramatically increase due to the growing preference for panoramic glass architecture [3][4][5]. To reduce energy consumption, window films integrated with thermal−shielding nanomaterials (including absorption− and reflection−based materials) have garnered intensive attention [6][7][8][9]. Taking into consideration the usage of buildings and vehicles, thermal−shielding nanomaterials require visible transparency and a favorable filter in near−infrared (NIR) radiation because 51% of the solar energy radiation is distributed within the NIR region in the solar spectrum [10].…”