Preparation of PCM microcapsules by using oil absorbable polymer particles

We attempted to prepare microcapsules by absorbing n-pentadecane as the phase change material (PCM) and methyl methacrylate (MMA) as the shell material into oil absorbable polymer particles.We could prepare the microcapsules containing PCM with the polymethyl methacrylate (PMMA) shell.In the experiment, the volume of methyl methacrylate monomer and the soaking time for oil absorbable polymer particles to soak into MMA were changed stepwise.With the increase in the volume of MMA absorbed, the diameters and mechanical strength of microcapsules were increased.Furthermore, it was found that the amount of PCM leaking from the microcapsules was decreased with the volume of MMA absorbed.