A stimuli-responsive hydrogel for reversible information storage, encryption and decryption

Area of Science:

• Materials Science
• Polymer Chemistry
• Information Storage

Background:

• Smart hydrogels are sensitive to external stimuli, offering reversible dynamic responses applicable to information storage.
• Developing hydrogels with high-resolution, repeatable recording, and robust encryption/decryption capabilities remains a significant challenge.

Purpose of the Study:

• To synthesize a novel polymer hydrogel with enhanced information storage capabilities.
• To investigate the hydrogel's performance in high-resolution, repeatable recording, and reversible encryption/decryption.

Main Methods:

• Synthesis of polyvinyl alcohol-n-isopropylacrylamide-octadecyl polyoxyethylene ether acrylate hydrogel (PPNS) via copolymerization.
• Utilized N-isopropylacrylamide, polyvinyl alcohol, and octadecyl polyoxyethylene ether acrylate (SGA15) as raw materials.
• Evaluated information recording, encryption, and decryption using anhydrous ethanol as an inducer and varying SGA15 concentrations.

Main Results:

• The synthesized PPNS hydrogel demonstrated high-resolution, repeatable recording, and reversible information encryption/decryption.
• PPNS-2% hydrogel (with 2% SGA15) showed superior performance in information handling with anhydrous ethanol and deionized water.
• The PPNS-2% hydrogel maintained excellent mechanical properties over 25 cycles and allowed for reversible recording via ethanol inscription and erasure.

Conclusions:

• The PPNS hydrogel exhibits excellent potential for innovative information storage platforms due to its responsive and dynamic nature.
• Ethanol acts as a specialized medium for inscribing and erasing information, enabling reversible data manipulation.
• The developed hydrogel addresses key challenges in high-resolution, repeatable data recording and encryption/decryption.