Controlled Latent Heat Phase-Change Microcapsules for Temperature Regulation.

Microencapsulation of phase-change materials (PCMs) is of great value and significance for improving energy efficiency and reducing carbon dioxide emissions. Here, highly controllable phase-change microcapsules (PCMCs) with hexadecane as the core material and polyurea as the shell material were developed for precise temperature regulation. A universal liquid-driven active flow focusing technique platform was used to adjust the diameter of PCMCs, and the shell thickness can be controlled by adjusting the monomer ratio.