The effect of different soft segments on the formation and properties of binary core microencapsulated phase change materials with polyurea/polyurethane double shell

► Novel micro-PCMs with phase change temperature adjustable binary core materials. ► Thermal properties of polyurea/PU micro-PCMs containing butyl stearate and paraffin. ► Micro-PCMs possessed binary core content in a range of 45-60 wt%. ► Optimizing micro-PCMs by altering the composition of the core and shell materials. ► The micro-PCMs have potential applications as thermal energy storage materials.