Materials, Год журнала: 2025, Номер 18(1), С. 164 - 164

Опубликована: Янв. 3, 2025

A novel organic–inorganic eutectic phase change material (PCM) based on sodium acetate trihydrate (SAT) and polyethylene glycol (PEG) was developed to meet the needs of heat recovery building heating. Three kinds PEG with different molecular weights were selected form PCM SAT. The thermal properties three series SAT-PEG compared DSC results, focusing impact addition temperature enthalpy SAT, as well melting uniformity. inhibitory effects two nucleating agents supercooling systematically investigated. effect crystallization behavior SAT studied using a metallographic microscope. To evaluate reliability PCM, 600 cycles melting–solidification experiments conducted. Experimental results show that can PCMs PEG200, PEG600, PEG6000, respectively, high excellent ranged from 55 °C 60 250–280 kJ/kg. cooling curves 10 wt% tetrasodium pyrophosphate decahydrate (TPD) reduce degree less than 1 °C. Significantly, all exhibit exceptional after melting–solidification, shifts in temperatures enthalpies 4%. XRD diffraction patterns showed PEG, TPD physically mixed without chemical reaction new substances. Microscopic images reveal preserves original needle-shaped crystal morphology while reducing its size. rapid formation small crystals provide more nucleation points expedite crystallization, thereby enhancing release capabilities PCM.

Язык: Английский