High-performance phase change material capsule by Janus particle. (June 2021)

• Record Type: Journal Article
• Authors: Gui, H.; Li, Y.; Du, D.; Liang, F.; Yang, Z.
• Is Part Of: Materials today energy. Volume 20(2021)
• Publication Date: 2021-06
• Subjects: Thermal energy management -- Emulsion stabilizer -- Spontaneous orientation -- High thermal conductivity -- High thermal storage capacity; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2021.100702
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: A new method is proposed to fabricate high-performance phase change material capsules with high thermal storage capacity and increased thermal conductivity. The capsules are achieved by free radical polymerization against the example paraffin/water emulsions stabilized with Janus particles (JPs). It is key that the highly conductive Ag-contained JP adopt parallel lying at the emulsion interface, which is responsible for increasing the interfacial thermal conductivity. Thermal storage capacity can be retained over 90% with no paraffin leakage, which is stable after many cycles of heating and cooling. The high-performance phase change material capsules are promising in effective thermal management in the form of either powder or slurry. Graphical abstract: Image 1 Highlights: Ag nanoparticles contained Janus particle (Ag-JP) was used to stabilize a paraffin/water emulsion. Phase change material capsule was achieved by free radical polymerization against the emulsion. The capsule preserves a high thermal storage capacity of over 90% with no wax leakage after many cycles of heating and cooling. The interfacial thermal conductivity is greatly increased using the Ag-JP. The high-performance PCM capsules are promising in effective thermal management.