正二十烷/十二水磷酸氢二钠/膨胀石墨复合相变蓄热储能材料的制备与性能分析  

The study on the preparation and performance of the N-E/DHPD/EG composite phase change materials

作　　者：杨毅 彭靖棠 陈志莉 董玉杰 吴洋 吕楠 YANG Yi;PENG Jingtang;CHEN Zhili;DONG Yujie;WU Yang;LYU Nan(Department of Military Installations,Army Logistics Academy,Chongqing 401311,China;College of Environment Science and Engineering,Guilin University of Technology,Guilin 541006,China)

机构地区：[1]中国人民解放军陆军勤务学院军事设施系,重庆401331 [2]桂林理工大学环境科学与工程学院,广西桂林541004

出　　处：《功能材料》2024年第6期6191-6195,共5页Journal of Functional Materials

基　　金：军队科研重点项目(BY114C006);重庆市重点自然科学基金项目(cstc2015jcyjBX0059)。

摘　　要：为解决十二水磷酸氢二钠的过冷、相分离、循环稳定性等问题,研发制备N-E/DHPD/EG复合相变材料,并对其各项性能进行表征分析。N-E/DHPD/EG复合相变材料过冷度降低到1℃以内,同时保持了229 J/g以上的相变焓,在保证相变焓不产生过大降低的情况下,复合相变材料过冷度问题得到很好的改善。同时,膨胀石墨的加入,极大的提升了复合相变材料的导热系数达1.086 W/(m·K)以上,且循环稳定性较好。To solve the problems of supercooling,phase separation and cycle stability of disodium hydrogen phosphate dodecahydrate,the N-E/DHPD/EG composite phase change materials are developed and prepared,and their properties are characterized,and the law and mechanism of performance change are explored.N-E/DHPD/EG composite phase change materials were prepared by vacuum impregnation.The supercooling degree of the composite phase change material is reduced to less than 1℃,and the enthalpy of phase change above 229 J/g is maintained.Under the condition that the enthalpy of phase change does not decrease too much,the supercooling degree of the composite phase change material has been solved.The mechanism of supercooling problem is revealed from thermodynamic point of view.By adding expanded graphite,the thermal conductivity of the composite phase change material is more than 1.086 W/(m·K),and the cycle stability is better.

关 键 词：十二水磷酸氢二钠 膨胀石墨 正二十烷 复合相变材料 

分 类 号：TB332[一般工业技术—材料科学与工程]