A Shape Memory Hydrogel with Excellent Mechanical Properties, Water Retention Capacity, and Tunable Fluorescence for...

Area of Science:

• Materials Science
• Polymer Chemistry
• Information Security

Background:

• Developing advanced encryption platforms with robust performance is crucial.
• Hydrogels offer potential due to their tunable properties.
• Existing platforms often lack reusability and mechanical integrity.

Purpose of the Study:

• To design a tough double-network hydrogel for dual information encryption.
• To incorporate pH-induced shape memory and fluorescence-dependent properties.
• To enhance mechanical performance and water retention for practical applications.

Main Methods:

• Synthesized a double-network hydrogel via one-pot polymerization and photopolymerization.
• Utilized lanthanide complexes for the first network and poly(N-hydroxyethyl acrylamide) (PHEAA) for the second.
• Employed deep eutectic solvent (DES)-assisted methods for network formation and solvent exchange.

Main Results:

• The hydrogel exhibited pH-induced shape memory and pH-/wavelength-dependent fluorescence for dual encryption.
• The material demonstrated excellent mechanical properties and high water retention.
• The platform showed high response reversibility, enabling rewritability and reusability.

Conclusions:

• The developed hydrogel serves as a promising dual-encryption platform with high security.
• The material's properties (mechanical strength, water retention, reusability) highlight its practical application potential.
• This work advances the field of smart materials for secure information storage and protection.