Innovative Design Of Superhydrophobic Thermal Energy-storage Materials By Microencapsulation Of N-docosane With Nanostructured Zno/sio₂ Shell

In modern society,fossil fuels play an important role,but the use of fossil fuels increases greenhouse gas emissions.Many countries are considering using renewable resources to reduce greenhouse gas emissions,and phase-change materials play an important role in renewable resources.The newly developed microencapsulated phase change material energy storage technology can increase the heat transfer area of the phase change material and reduce the reactivity of the phase change material to the external environment.The surface of superhydrophobic materials presents a wealth of new structural and functional properties which are of great significance in both basic research and practical applications.Especially at the present stage,the rapid development of optoelectronic components,microelectronic systems and nanotechnology has brought broad prospects for the research and wide development of superhydrophobic materials.In this paper,a new superhydrophobic heat storage material is innovatively designed,which uses nano-structured ZnO/SiO2 shell microencapsulated phase change material.The microcapsule system was formed by emulsification template of silicon dioxide precursor,it is formed by interfacial condensation and zinc oxide crystal structure.Through chemical composition and structural characteristics test,we proved the successful manufacture of this graded microcapsule system,and clearly determined the nucleocapsid structure and the formation of flower-like zinc oxide surface.The results of thermal analysis showed that the synthesized microcapsules could not only store and release heat from the phase change above the enthalpy value of 139J/g,but also had high phase change reliability and long-term durability.At the same time,the optimal heating and discharging conditions of microcapsules were determined by scanning calorimetry analysis of non-isothermal and isothermal difference.Infrared thermographic analysis showed that the microcapsules had good thermal regulation and thermal management ability.Through the combination of nano-surface and low-surface energy material coating,the contact angle of water reaches 159.7°,which meets the requirements of superhydrophobic.Because of the combination of phase change materials and superhydrophobic properties,the layered microcapsule system has been developed.This research is expected to have a broad application prospect in the fields of thermal energy storage,thermal regulation and management,self-cleaning antifouling paint,anticorrosion,liquid transportation and other multi-functional applications.