Preparation and Thermal Characterization of Capric-Myristic Acid Binary Eutectic Mixture with Silver–antimony Tin Oxide and Silver-Graphane Nanoplatelets Hybrid-Nanoparticles As Phase Change Material for Building Applications

The capric-myristic acid binary eutectic mixture (CA-MA) was prepared as phase change material (PCM) for building applications; later, novel hybrid-nanocomposites of silver-antimony tin oxide (Ag-ATO) and silver-graphane nanoplatelets (Ag-GNP) were added with CA-MA with a weight percentage of 1 and 2 respectively to form a hybrid-nanocomposite PCMs (HNCPCMs). The chemical and thermal characterization of pure CA-MA and HNCPCMs showed that their stability is significant for building applications. The melting temperature (Tm) and freezing temperature (Tf) of pure CA-MA synthesised are 18.15 C and 16.00 C, respectively, with melting latent heat (Hm) and freezing latent heat (Hf) of 158.75 J/g and 158.07 J/g, respectively. An HNCPCM of CA-MA/Ag-GNP (1 % wt) shows an improved melting thermal conductivity of 18.52 %, with negligible deviation in melting-freezing temperature and latent heat. The proposed CA-MA/Ag-GNP (1 % wt) has significant thermal, chemical, and long-term cycling reliability, making it a promising material for building applications.