Determining influences of SiO2 encapsulation on thermal energy storage properties of different phase change materials

Organic phase change materials (PCMs) have relatively high latent heat capacities, are stable, nontoxic, and not corrosive. Having such advantages, organic PCMs shall find applications in many more thermal energy storage (TES) systems. Currently their main handicap is finding a cost-effective, environmentally benign and compatible encapsulation method. This study uses SiO2, which is preferred in several biocompatible applications, as shell material to microencapsulate two different organic PCMs: Paraffin and Stearic acid. Nanocapsules of these PCMs with sizes in the range of 20–700 nm were produced by in situ emulsion interfacial hydrolysis and polycondensation technique. The resulting microencapsulation ratios observed were 11% for paraffin (PA) and 23% for stearic acid (SA). © 2016 Elsevier B.V.Horizon 2020: 657466 213M650The authors would like to acknowledge the support provided by TUBITAK under the Project no: 213M650 and European Union's Horizon 2020 Research and Innovation Programme under grant agreement no 657466 (INPATH-TES)