Fatty Acid/Expanded Graphite Encapsulating Form-Stable Phase Change Materials for Energy Storage  

作　　者：李琳 李东旭 张毅 张树鹏 

机构地区：[1]College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China [2]Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 210009, China

出　　处：《Journal of Donghua University(English Edition)》2017年第3期442-447,共6页东华大学学报（英文版）

基　　金：National Science&Technology Pillar Program during the Twelfth Five-Year Plan Period,China(No.2014BAL03B04)

摘　　要：The lauric-myristic-palmitic acid( LA-MA-PA) ternary eutectic mixtures/expanded graphite( EG) composite phase change materials( PCMs) were prepared by absorbing LA-MA-PA into the porous network of EG. The optimum ratio of ternary eutectic mixtures to EG was determined to be 93∶7 without liquid LA-MA-PA leakage from the composite PCMs. In order to make the structure more stable, the composite PCMs were encapsulated by surface treatment agent to prepare LA-MA-PA/EG encapsulating form-stable PCMs which were characterized by scanning electron microscope( SEM),Fourier transformation infrared spectroscope( FT-IR),differential scanning calorimetry( DSC) and thermal treatment. The results showed there was no chemical reaction between surface treatment agent and LA-MA-PA,and the samples were compactly encapsulated which left almost no imprint on the filter paper after thermal treatment. The phase change temperature and latent heat of LA-MA-PA/EG encapsulating form-stable PCMs were tested to be29. 32 ℃ and 96. 20 J/g,respectively. Additionally,the heat transfer efficiency of heat storage was improved by the addition of EG.The lauric-myristic-palmitic acid（ LA-MA-PA） ternary eutectic mixtures/expanded graphite（ EG） composite phase change materials（ PCMs） were prepared by absorbing LA-MA-PA into the porous network of EG. The optimum ratio of ternary eutectic mixtures to EG was determined to be 93∶7 without liquid LA-MA-PA leakage from the composite PCMs. In order to make the structure more stable, the composite PCMs were encapsulated by surface treatment agent to prepare LA-MA-PA/EG encapsulating form-stable PCMs which were characterized by scanning electron microscope（ SEM）,Fourier transformation infrared spectroscope（ FT-IR）,differential scanning calorimetry（ DSC） and thermal treatment. The results showed there was no chemical reaction between surface treatment agent and LA-MA-PA,and the samples were compactly encapsulated which left almost no imprint on the filter paper after thermal treatment. The phase change temperature and latent heat of LA-MA-PA/EG encapsulating form-stable PCMs were tested to be29. 32 ℃ and 96. 20 J/g,respectively. Additionally,the heat transfer efficiency of heat storage was improved by the addition of EG.

关 键 词：graphite eutectic latent imprint encapsulated prepare calorimetry Stable mixtures ternary 

分 类 号：TU599[建筑科学—建筑技术科学]