Graphene oxide and carbon nanotubes hybrid microcapsule wood-based composite phase change materials for efficient thermal storage

作者：Jian Zhang, Lin Lin, Zhi Li, Qiang Zhang, Benyuan Cheng · 发表于：Physica Scripta · 年份：2025 · DOI：10.1088/1402-4896/ae1cfa · 被引用次数：2 · 研究领域：Phase Change Materials Research、Thermal properties of materials、Adsorption and Cooling Systems

Abstract Phase change heat storage technology is conducive to solving the problem of mismatch between supply and demand of heat supply and improving energy efficiency. However, the leakage problem and low thermal conductivity of phase change materials (PCM) during the phase transition process limit the application. In this study, using delignified wood as a carrier, vacuum impregnated graphene oxide (GO) and carbon nanotubes (CNTs) hybrid n-octadecane phase change microcapsules are used to achieve efficient storage and conversion of wood thermal energy. GO and CNTs were simultaneously added to the microcapsule wall material to form a heat-conducting network structure to improve its thermal conductivity. The synergistic effect of the two materials in thermal conductivity was utilized to explore the influence of different proportions of GO/CNTs on the thermal conductivity and comprehensive performance of microcapsules. GO/CNTs hybrid microencapsulated wood based composite PCM has a high thermal energy storage density with a latent heat of 115.62 J g −1 , which can be maintained after 50 heat and cooling cycles. The obtained PCM composites also have excellent thermal stability and enhanced thermal conductivity. This study provides a new idea for the design and manufacture of thermally enhanced stabilized PCM.