Mesoporous molecular sieve confined phase change materials with high absorption,enhanced thermal conductivity,and cooling energy charging/discharging capacity  

作　　者：Qi Zhang Chongyang Liu Xuehong Wu Xueling Zhang Jun Song 

机构地区：[1]School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou 450007,China

出　　处：《Frontiers of Materials Science》2024年第1期1-14,共14页材料学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51906230);the Key scientific and technological projects in Henan Province(Grant No.212102210007);the Project of Zhongyuan Science and Technology Innovation Talents(Grant No.234200510011).

摘　　要：The biggest challenge for organic phase change materials(PCMs)used in cold energy storage is to maintain high heat storage capacity while reducing the leakage risk of PCMs during the phase transition process.This is crucial for expanding their applications in the more demanding cold storage field.In this study,novel formstable low-temperature composite PCMs are prepared with mesoporous materials,namely SBA-15 and CMK-3(which are prepared using the template method),as supporting matrices and dodecane as the PCM.Owing to the combined effects of capillary forces within mesoporous materials and interactions among dodecane molecules,both dodecane/SBA-15 and dodecane/CMK-3 exhibit outstanding shape stability and thermal cycling stability even after 200 heating/cooling cycles.In comparison to those of dodecane/SBA-15,dodecane/CMK-3 exhibits superior cold storage performance and higher thermal conductivity.Specifically,the phase transition temperature of dodecane/CMK-3 is-8.81℃ with a latent heat of 122.4 J·g^(-1).Additionally,it has a thermal conductivity of 1.21 W·m^(-1)·K^(-1),which is 9.45 times that of dodecane alone.All these highlight its significant potential for applications in the area of cold energy storage.

关 键 词：cold energy storage phase change material mesoporous molecular sieve CMK-3 SBA-15 cooling energy charging/discharging capacity 

分 类 号：O62[理学—有机化学]