Influence of physical characteristics of graphene/Al2O3 composites employing nano particles based organic phase changing materials. (2023)

• Record Type: Journal Article
• Authors: Saravanakkumar, D.; Kumar Tulasi, Sanath; Kumar Srivastava, Bipin; Manoj Kumar, Nellore; Gayatri Devi, N.; Sakhare, D.T.
• Is Part Of: Materials today. Volume 77(2023)Part 2
• Page Start: 448
• Page End: 454
• Publication Date: 2023
• Subjects: Graphene -- PCM -- Paraffin wax -- Thermal conductivity -- FTIR -- TGA; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.11.137
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: In the field of energy conservation and management, PCMs are increasingly being used to store latent heat. PCMs have been infused with nanoparticles to enhance their thermal conductivity. This work presents the results of a study on the thermo-physical characteristics of an Al2 O3 -Graphene (Al2 O3 : Gr) binary composite (1 wt% Al2 O3 :0.5, 1, 1.5, and 2 wt% of Graphene (Gr)) with Paraffin wax (PW) as a surfactant. Thermo-gravimetric analyzer (TGA), Thermal property analyzer (TEMPOS), and UV–VIS spectrometer (UV–VIS) were all employed to characterize the materials. The latent heat capability of Paraffin Wax/Al2 O3 Gr and PW/Al2 O3 Graphene binary composites increased by 8.62 % and 10.02 %, as compared to Phase change material. Al2 O3 -1.0 and Al2 O3 Gr-1.0% PCMs exhibit thermal conductivities that are 130 and 180 %more than base paraffin wax. According to the Fourier Transform Infrared spectra, there was no chemical connection between the paraffin wax and nanoparticles. Thermal stability was raised by including Al2 O3 -Graphene particles into the paraffin wax matrix, according to TGA measurements. The produced composite's light transmission was lowered by 60.2% compared to the base PW, resulting in higher light absorption and, as a result, increased photothermal transformation. Thermal conductivity and enthalpy of the composite generate a great choice of solar photovoltaic thermal and TES systems.