D-甘露醇基复合相变材料研究进展

Research progress of D-mannitol-based phase change materials

糖醇有适中的相变温度与较高的潜热值,在中温储能领域拥有广阔的应用前景,其中D-甘露醇是近些年研究的热点。D-甘露醇具有多态性,熔点在166℃左右,潜热约为300J/g,但存在导热性差、循环稳定性/热稳定性差、过冷严重等问题,极大地限制了其在热储存领域的发展。简述了D-甘露醇的热物理性能,总结了对导热性、热稳定性差、过冷等方面的改进方式,并对未来的发展做了展望。

With moderate phase transition temperature and high latent heat value,sugar alcohols have broad application prospects in the field of medium-temperature energy storage.Among them,D-mannitol has been a research hotspot in recent years.D-mannitol has polymorphism with a melting point of about 166℃and a latent heat of about 300J/g,but it has problems such as poor thermal conductivity,poor cyclic stability/thermal stability,serious overcooling,which greatly limit the development in the field of thermal storage.In this paper,the thermophysical properties of D-mannitol were briefly described,and the improvement methods for thermal conductivity,poor thermal stability and overcooling were summarized.The future development of D-mannitol was prospected.