Floatable and Integrated Shape-shifting Hydrogel Carrier

Area of Science:

• Materials Science
• Biomaterials Engineering
• Environmental Science

Background:

• Traditional aquatic floaters are rigid and lack adaptability.
• Microbial buoyancy regulation offers inspiration for advanced materials.

Purpose of the Study:

• To develop a floatable and integrated shape-shifting (FISS) hydrogel for advanced floating carriers.
• To combine robustness with adaptability for versatile interfacial functions.

Main Methods:

• In situ formation of amorphous magnesium carbonate (AMC) nanoparticles for dynamic crosslinking.
• Incorporation of amino-functionalized hollow microspheres for tunable buoyancy and crosslinking.
• Microstructural engineering to achieve a stable state of "limited fluidity".

Main Results:

• The FISS hydrogel exhibits hydrostatic equilibrium on water surfaces with controlled dissipation.
• Demonstrated versatile interfacial functions: evaporation suppression, pollution shielding, and underwater gas capture.
• Assembly via interfacial adhesion enabled diverse carrier applications, including tunable evaporators and flexible detectors.

Conclusions:

• Presents a design strategy for a flexible and integrable hydrogel-based floater.
• Extends the application scenarios of hydrogel materials in environmental and energetic fields.
• Highlights the potential of biomimetic design for advanced functional materials.