Bioinspired Alveolar Sac-Like Hierarchical Foams Stabilized by Hydrophobic Copolymer Colloidal Particles

Area of Science:

• Materials Science
• Colloid and Surface Chemistry

Background:

• Hierarchical Pickering foams offer multifunctional properties via multiscale bubbles.
• Controllable fabrication of well-defined hierarchical foams is a key research area.

Purpose of the Study:

• To develop a facile strategy for constructing hierarchical Pickering foams with a specific architecture.
• To investigate the factors influencing the formation of these foams.

Main Methods:

• High-speed homogenization technique.
• Stabilization of foams using hydrophobic random copolymer colloidal particles.

Main Results:

• Successfully constructed hierarchical Pickering foams with an alveolar sac-like architecture.
• Identified correlations between foam formation and particle properties (hydrophobicity, composition, size, zeta potential) and solution parameters (surface tension, pH, salt concentration).

Conclusions:

• The developed method provides a facile route to unique hierarchical Pickering foams.
• The alveolar sac-like structure offers a platform for exploring interbubble interactions.