Preparation and properties of expanded vermiculite-based composites
In this study,the Capric-palmitic acid(CA-PA)binary eutectic PCM was vacuum impregnated into the expanded vermiculite(EVM)to prepare CA-PA/EVM composite phase change thermal storage material.FT-IR,DSC,TG,and thermal cycling were used to assess the chemical compatibility,heat storage performance,thermal stability,and thermal reliability of CA-PA/EVM.The results showed that CA-PA was stably loaded in the layered pores of EVM through physical interaction,and CA-PA/EVM had excellent chemical compatibility.The Melting and solidification phase transition temperatures of CA-PA/EVM were 23.61 and 20.41℃,respectively.The latent heat of melting and solidification phase transition were 67.22 and 64.87 J/g,respectively.The amount of CA-PA encapsulated in EVM could reach 52.22%,and it had favorable thermal stability at working temperature.In addition,the CA-PA/EVM maintained great thermal reliability after 100 thermal cycles,indicating its potential application in the building energy conservation field.
capric acid-palmitic acidexpanded vermiculitecomposite phase change energy storage materialbuilding energy conservation
万方数据
维普
