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Shape Memory Hydrogels with Simultaneously Switchable Fluorescence Behavior.

Yu-Kun Jian^1,2, Xiao-Xia Le^1,2, Yu-Chong Zhang^1,2

¹Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.

Macromolecular Rapid Communications

|April 27, 2018

Summary

This study introduces a novel shape memory hydrogel with switchable fluorescence. The material allows for real-time monitoring of shape changes via fluorescence imaging, enabling new applications in information storage.

Keywords:

chitosan microcrystals pH-responsive shape memory hydrogels switchable fluorescence

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Area of Science:

Materials Science
Polymer Chemistry
Biomaterials

Background:

Shape memory hydrogels are crucial for advanced materials, but understanding their dynamic processes is limited.
Developing materials with integrated functionalities, like shape memory and optical signaling, is an ongoing challenge.

Purpose of the Study:

To develop a novel shape memory hydrogel with simultaneously switchable fluorescence behavior.
To investigate the concurrent relationship between shape memory effects and fluorescence switching in a chitosan-based hydrogel.

Main Methods:

Incorporation of a pH-responsive fluorescent molecule (perylene tetracarboxylic acid) into a chitosan-based hydrogel.
Utilizing the pH-triggered assembly and disassembly of chitosan chains into microcrystals as reversible crosslinks for shape memory.
Monitoring shape memory processes using fluorescent imaging due to concurrent fluorescence switching.

Main Results:

A novel shape memory hydrogel exhibiting simultaneously switchable fluorescence was successfully prepared.
The formation and dissociation of microcrystalline chitosan were directly correlated with fluorescence changes.
The hydrogel demonstrated concurrent shape memory effects and fluorescence performance, allowing for fluorescent imaging of the shape memory process.

Conclusions:

The developed hydrogel provides a convenient method for monitoring shape memory processes through fluorescent imaging.
The erasable fluorescence behavior opens potential applications for this hydrogel in information storage and other advanced fields.