Self-assembly And Regulation Of Phase Change Energy Storage Composite Capsules

Phase change materials(PCMs)can absorb,storage and release amount of latent heat undergoing phase change process in a certain temperature range,but the temperature is almost constant.So the PCMs is environmental,green and efficient energy storage materials.Capsule technology was encapsulated functional materials through film-forming material into cells to solve the problems such as storage and transportation of phase change materials.The technology improved the usage efficiency and expanded the application area of the phase change materials.With the advantages of microcapsule such as high latent heat,high thermal storage density,stable performance and long service life.MicroPCMs is becoming the hotspot of the energy storage area.The paper showed the composite macrocapsules with the particle size range from 0.5 mm to 2.0 mm.Macrocapsules was prepared with PAMA/calcium-alginate as shell and n-octadecane as core.Microcapsules microencapsulated n-octadecane as phase change materials were successfully fabricated via suspension polymerization.Macrocapsule with various narrow-disperse diameter containing MicroPCMs were prepared using coaxial composite nozzle through polymer solution spray method.Microstructure as well as thermal properties of capsules were systematically.Furthermore,the concerted metal-ion complexation of macrocapsule alginate matrix,capsule shell and carboxylic carbon nanotube was studied.The resulting of narrow-disperse macrocapsules showed promising prospect in the field of functional thermal fluid and other area.Macrocapsules was prepared with calcium-alginate/SiO2 as shell and n-octadecane as core.Macrocapsule with various narrow-disperse diameter containing MicroPCMs were prepared using coaxial composite nozzle through polymer solution spray method.We synthesized the hydrolysis and condensation of tetraethoxysilane(TEOS).And FTIR and XRD can confirm n-octadecane had no reaction between matrix and SiO2.There was no change of octadecane and SiO2 crystal structure after encapsulated.The results indicated that the melting enthalpy of the macrocapsules can reach 146.6 J/g,and it could be concluded that the enhanced thermal conductivity of the microcapsules with SiO2 as inorganic shell could suppress the supercooling to a certain degree.The resulting macrocapsules showed promising prospect in the field of thermal energy storage and thermal-regulated clothes.Microcapsule of concave microstructure was prepared with cellulose acetate as shell and n-octadecane as core.This solution with acetone,TMAC,cellulose acetate and n-octadecane sprayed into receiving device with the atmosphere was 170 ?prepared microcapsules using coaxial composite nozzle through solution spray method.And microcapsule of concave microstructure was prepared with cellulose acetate as shell and n-octadecane as core.Then microcapsules was modified by glutaraldehyde to fabricate the superior performance of the energy storage materials.Cellulose acetate(CA)owing networking structure increased the surface area of phase change materials,and the microstructure of CA had protective effect for the release of heat transfer.