Recyclable Solid-Solid Phase Change Materials with Superior Latent Heat via Reversible Anhydride-Alcohol Crosslinking
Yahe Wu1, Mingsen Chen1, Guangzhi Zhao1
1Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.
Advanced Materials (Deerfield Beach, Fla.)
|January 17, 2024
Summary
Researchers developed novel solid-solid phase change materials (SSPCMs) using reversible crosslinking for high latent heat and dual recyclability. These advanced SSPCMs offer improved energy storage and solar energy applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Energy Storage
Background:
- Solid-solid phase change materials (SSPCMs) offer shape stability but often suffer from reduced latent heat and poor recyclability due to crosslinking.
- Existing crosslinked SSPCMs require encapsulation or support, limiting their practical applications.
Purpose of the Study:
- To develop novel SSPCMs with enhanced latent heat and dual recyclability.
- To overcome the limitations of traditional crosslinked SSPCMs by utilizing a reversible crosslinking strategy.
Main Methods:
- Fabrication of SSPCMs using an internal-catalyzed reversible anhydride-alcohol crosslinking reaction.
- Utilized anhydride copolymers (propylene-maleic anhydride) and polyethylene glycol as both phase change material and crosslinker.
- Investigated dual recyclability through bond-exchange remolding and reversible dissociation-recrosslinking.
Main Results:
- Achieved a peak latent heat of 156.8 J g-1, surpassing existing recyclable crosslinked SSPCMs.
- Demonstrated tunable tensile strength (6.6–11.0 MPa) and material flexibility.
- Exhibited exceptional dual recyclability without requiring additional reactive chemicals.
Conclusions:
- The novel reversible crosslinking strategy effectively enhances latent heat and recyclability in SSPCMs.
- These SSPCMs show promise for efficient solar energy conversion, storage, and release, especially with integrated solar-thermal fillers.
- The developed materials represent a significant advancement in recyclable and high-performance phase change materials.
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