Preparation and Performance Study of Organic Phase Change Refrigerant for Microfreezing and Preservation

Abstract In this paper, to develop a stable and efficient micro-frozen cold storage agent ensure the freshness of food during transportation, organic sorbitol aqueous solution was used as main energy agent, thermal properties multiple compound were investigated after adding potassium sorbate, glycine, highly absorbent resin. The experimental results proved that total mass fraction not more than 0.1% sorbate preservative could prolong service life supplemented by low molecular glycine resin with properties. specific formulation final developed is follows: 5% + 1.75% SAP 1% pure water. new phase change accumulator latent heat 286.5J/g onset temperature -4.3°C can be measured. After performance cycle test, it found has no obvious delamination, subcooling, separation phenomenon, It repeatedly for long time, which certain application development prospects in chain transportation low-temperature logistics.