Binary Crystallized Supramolecular Aerogels Derived from Host-Guest Inclusion Complexes

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Aerogels offer desirable properties like low density and high porosity.
• Converting hydrophilic polymer hydrogels into aerogels presents significant challenges.
• Supramolecular chemistry offers novel pathways for advanced material design.

Purpose of the Study:

• To develop a new class of aerogels using supramolecular self-assembly.
• To investigate the structural characteristics and tunability of these novel aerogels.
• To explore the application of these aerogels as solid-solid phase change materials.

Main Methods:

• Formation of supramolecular hydrogels via self-assembly of poly(ethylene glycol) and cyclodextrins.
• Conversion of hydrogels to aerogels, preserving the supramolecular cross-linking.
• Characterization of the resulting aerogels' microstructure, surface area, and thermal properties.

Main Results:

• Successful synthesis of supramolecular aerogels (SMAs) with a unique binary crystallized nanosheet structure.
• Demonstrated tunability of specific surface areas and nanosheet morphology.
• Validated the SMAs' performance as solid-solid phase change materials with tunable latent heat.

Conclusions:

• Supramolecular self-assembly provides an effective route to overcome challenges in aerogel fabrication from hydrogels.
• The resulting SMAs exhibit tunable structural features and promising applications in thermal energy storage.
• The SMAs demonstrate stable, reversible phase change cycles without microstructural degradation.