A Facile Eutectic Strategy for Scalable, Leakage-Free Thermochromic Phase-Change Composites Enabling Smart...

Area of Science:

• Materials Science
• Chemical Engineering
• Physical Chemistry

Background:

• Solid-liquid phase change materials (PCMs) are crucial for thermochromic composites.
• Leakage issues in PCMs degrade the performance of thermochromic systems.
• Current stabilization methods like encapsulation are complex, costly, and not scalable.

Purpose of the Study:

• To develop a facile and cost-effective method for creating leakage-free PCMs.
• To stabilize organic thermochromic composites using a novel eutectic strategy.
• To explore the potential of these stabilized PCMs in advanced applications.

Main Methods:

• A eutectic mixture of lauric acid (LA) and sodium acetate trihydrate (SAT) was synthesized.
• Molecular dynamics simulations were employed to investigate intermolecular interactions.
• The shape stability and thermochromic performance of the composite were evaluated.

Main Results:

• The SAT/LA eutectic demonstrated significantly enhanced intermolecular interactions, preventing leakage and phase separation.
• The resulting thermochromic composites exhibited excellent shape stability and reversible color-changing properties.
• The material showed considerable latent heat capacity, suitable for thermal energy storage.

Conclusions:

• The facile eutectic strategy offers a cost-effective and scalable solution for leakage-free PCMs.
• Shape-stabilized thermochromic composites based on SAT/LA eutectic show promise for temperature indicators and information encryption.
• This approach provides a pathway for designing industrial-scale, high-performance thermochromic materials.