期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：242
期号：3
页码：1-10
DOI：10.1088/1755-1315/242/3/032005
出版社：IOP Publishing
摘要：Using the economical and environmental paraffin as core, Paraffin/SiO2 composite phase change materials (PCMs) were prepared by sol-gel method. Industrial water glass for preparation of the nano-SiO2 was served as a shell with the modification of silane coupling agent. We combined Soxhlet extraction with penetration circle for the coating rate and the optimization of preparation was obtained via SPSS. The composite PCMs were investigated by SEM, TG, FT-IR, DSC technique. The results indicated that the optimization of preparation(PH = 4.5 and T = 35°C) was available. When the efficient coating rate of paraffin reached up to 60.04%, the phase-transition temperature was 38.73°C and the enthalpy of phase change was 72.88J/g. Moreover, thermal stability and reliability of the paraffin/SiO2 composite PCMs were proved through TG curves. So it could be formulated that paraffin/SiO2 composite PCMs with no leakage, excellent thermal storage capacity could be employed in energy conservation as a kind of thermal functional material.
