About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
Presentation Title |
Fabrication and Characterization of Polyurea-Polyurethane/Silver Bilayer Shell Phase-Change Nanocapsules |
Author(s) |
Sitong Liu, Tonghe Li, Dengti Hu, Hao Bai |
On-Site Speaker (Planned) |
Sitong Liu |
Abstract Scope |
Composite dual-layer shell phase change capsules have received attention due to their excellent thermal storage capacity, high thermal conductivity and good thermal stability. In this study, a method combining in-situ polymerization and liquid-phase reduction was proposed to prepare polyurea-polyurethane organic phase change nanocapsules. Firstly, a polyurea-polyurethane shell is formed on the surface of the core material of butyl stearate through in-situ polymerization method. Afterwards, a layer of silver shell is formed on the surface of the previously prepared phase change capsules which have polyurea-polyurethane shell using the liquid-phase reduction method. Finally, the polyurea-polyurethane/silver shell phase change nanocapsules are obtained. The volume encapsulation efficiency of the dual-layer shell phase change nanocapsules prepared reaches 82.39%. The thermal conductivity is 2.164 W/(m∙K), indicating an improvement in thermal conductivity compared with the nanocapsules without the silver shell. After 1000 thermal cycles, minimal enthalpy loss during melting and solidification suggests excellent thermal reliability. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Composites, Nanotechnology |