High Thermal Conductivity of Carboxyl-rich Carbon/Polyethylene Glycol Composites for Enhanced Photothermal Conversion and Latent Heat Storage  

作　　者：Huizhi Yang Yufeng Bai Chunhua Ge Shangyu Li Xiangdong Zhang 

机构地区：[1]College of Chemistry,Liaoning University,Chongshan Road No.66,Shenyang,Liaoning 110036,China

出　　处：《Chinese Journal of Chemistry》2021年第12期3245-3254,共10页中国化学（英文版）

基　　金：This work was funded and supported by the Liaoning Provincial Education Department Foundation(Nos.LJC201916 and LFW201901);The authors are very grateful to other people for their participation in this work.

摘　　要：Polyethylene glycol(PEG)as phase change material(PCM)and carboxyl-rich carbon(RHTC)with different carboxyl content was introduced to prepare RHTC/PEG composites.The composites have high thermal conductivity,photothermal conversion ability,and improved the phase change enthalpy of the system.The microstructure and thermal properties of the samples were analyzed by various characterization methods.RHTC promoted the benign growth of PEG crystallinity(110.0%),influenced the phase change enthalpy of PEG,and improved the latent heat storage capacity of composites.The non-leakage loading of PEG in the composites can be as high as 97 wt%,and the actual phase change enthalpy is 10.7 J/g higher than that of pure PEG,10%higher than the theoretical value.Owing to the heat storage bridge formed between PEG and RHTC,the thermal conductivity of the composites was up to 0.51 W/mK,which was 99.4%higher than that of PEG.Besides,the introduction of environmentally friendly and low-cost RHTC gives the composites excellent photothermal conversion capability,and its photothermal conversion energy storage efficiency is as high as 90.1%.These results prove that the prepared composites are promising potential candidates in the field of thermal storage and thermal management systems.

关 键 词：Latent heat storage CARBOXYLATION Renewable resources Photothermal conversion capacity THERMOCHEMISTRY 

分 类 号：TB33[一般工业技术—材料科学与工程]