Preparation and Thermal Properties of Capric-palmitic-stearic Acid/Expanded Graphite Composite Phase Change Material for Energy Storage
HUANG Xue1, CUI Yingde2, YIN Guoqiang1, ZHANG Buning1, FENG Guangzhu1
1 College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225; 2 Guangzhou Vocational College of Science and Technology, Guangzhou 510450;
Abstract: A novel capric-palmitic-stearic acid/expanded graphite composite phase change material (CPCM) has been prepared by vacuum impregnation method through phase change material (PCM) derived from a ternary eutectic, which was a mixture of capric acid, palmitic acid and stearic acid. The appropriate mass ratio were m(CA)∶m(PA)∶m(SA)=77.0∶11.5∶11.5 and m(CA-PA-SA)∶m(EG)=13∶1. Different analytical methods including DSC, FT-IR, TG, SEM, cold/thermal cycling test and thermal storage/release performance methods were adopted to study the structure and thermal properties of the material. The SEM and FT-IR results showed that CA-PA-SA was dispersed into the pores of EG through physical interaction. The DSC results indicated that the melting and freezing temperatures of CA-PA-SA/EG CPCM were 28.93 ℃ and 16.32 ℃,and the latent heats were 137.38 J/g and 141.51 J/g. TG analysis results revealed that CA-PA-SA/EG CPCM had a reliable thermal stability under 100 ℃. The results of 500 thermal cycles and thermal storage/release performance showed that CA-PA-SA/EG CPCM had good thermal reliability and long service life. Thermal conductivity of CA-PA-SA/EG CPCM was improved by high thermal conductivity of the EG. All the results indicated that the prepared CA-PA-SA/EG CPCM had proper phase change temperature, high latent heat and thermal conductivity, good thermal reliability and stability. The proposed new material is suitable for application in energy storage.
1 Sari A, Kaygusuz K. Thermal energy storage system using some fatty acids as latent heat energy storage materials[J]. Energy Sources,2001,23(3):275. 2 Alkan C, Kaya K, Sari A. Preparation, thermal properties and thermal reliability of form-stable paraffin/polypropylene composite for thermal energy storage[J].J Polym Environ,2009,17(4):254. 3 Dan N N, Haghighat F. Thermal energy storage with phase change material—A state-of-the art review[J]. Sustainable Cities Soc,2014,10:87. 4 Zhang Z G, Zhang N, Peng J, et al. Preparation and thermal energy storage properties of paraffin/expanded graphite composite phase change material[J]. Appl Energy,2012,91(1):426. 5 Fauzi H, Metselaar H S C, Mahlia T M I, et al. Sodium laurate enhancements the thermal properties and thermal conductivity of eutectic fatty acid as phase change material (PCM)[J]. Solar Energy,2014,102(4):333. 6 Kenisarin M M. Thermophysical properties of some organic phase cha-nge materials for latent heat storage: A review[J]. Solar Energy,2014,107(9):553. 7 Pielichowska K, Pielichowski K. Phase change materials for thermal energy storage[J]. Progress Mater Sci,2014,65(10):67. 8 Feldman D, Shapiro M M, Banu D, et al. Fatty acids and their mixtures as phase-change materials for thermal-energy storage[J]. Solar Energy Mater,1989,18(3-4):201. 9 Hasan A, Sayigh A A. Some fatty acids as phase change thermal energy storage materials[J]. Renewable Energy,1994,4(1):495. 10 Inoue T, Hisatsugu Y, Ishikawa R, et al. Solid-liquid phase beha-vior of binary fatty acid mixtures: 3. Mixtures of oleic acid with capric acid (decanoic acid) and caprylic acid (octanoic acid)[J]. Chem Phys Lipids,2004,127(2):143. 11 Rozanna D, Chuah T G, Salmiah A, et al. Fatty acids phase change materials(PCMs) for thermal energy storage: A review[J]. Int J Green Energy,2005,1(4):495 12 Sari A, Alkan C, Karaipekli A, et al. Preparation, characterization and thermal properties of styrene maleic anhydride copolymer (SMA)/fatty acid composites as form stable phase change materials[J]. Energy Conversion Management,2008,49(2):373. 13 Sari A, Karaipekli A, Kaygusuz K. Fatty acid/expanded graphite composites as phase change material for latent heat thermal energy storage[J]. Energy Sources Part A-Recovery Utilization and Environmental Effects,2008, part A(5):464. 14 Wang L, Meng D. Fatty acid eutectic/polymethyl methacrylate composite as form-stable phase change material for thermal energy sto-rage[J]. Appl Energy,2010,87(8):2660. 15 He H, Yue Q, Gao B, et al. The effects of compounding conditions on the properties of fatty acids eutectic mixtures as phase change materials[J]. Energy Conversion Management,2013,69(5):116. 16 Zhang N, Yuan Y, Wang X, et al. Preparation and characterization of lauric-myristic-palmitic acid ternary eutectic mixtures/expanded graphite composite phase change material for thermal energy storage[J]. Chem Eng J,2013,231(s11-12):214. 17 Yuan Y, Yuan Y, Zhang N, et al. Preparation and thermal characterization of capric-myristic-palmitic acid/expanded graphite compo-site as phase change material for energy storage[J]. Mater Lett,2014,125(24):154. 18 Li Y T, Yan H, Wang H T, et al. Phase transformation kinetics of phase change materials of expanded graphite/stearic acid composite[J]. Chin J Mater Res,2016,30(12):921(in Chinese). 李云涛, 晏华, 汪宏涛, 等. 膨胀石墨/硬脂酸复合相变材料的相变动力学[J]. 材料研究学报,2016,30(12):921. 19 Huang X, Cui Y D, Zhang B N, et al. Review on heat transfer and liquid phase leakage of fatty acids phase change materials[J]. Chem Ind Eng Progress,2014,33(10):2676(in Chinese). 黄雪, 崔英德, 张步宁, 等. 脂肪酸类相变材料传热及液相渗漏的研究进展[J]. 化工进展,2014,33(10):2676.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
