JoVE - Journal of Visualized Experiments
JoVE Visualize
Contact Us

Fabrication of Luminescent Triple-Cross-Linked Gelatin/Alginate Hydrogels through Freezing-Drying-Swelling and Freezing-Thawing Processes

  • 0Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
Biomacromolecules +

|

August 15, 2024

|

August 15, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

This study developed stable, luminescent hydrogels using dynamic cross-links and Europium(III) ions. These advanced materials show promise for bacterial monitoring and heavy metal detection.

Area Of Science

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background

  • Lanthanide luminescent hydrogels offer potential for sensing and imaging.
  • Challenges include poor stability and mechanical strength when integrating lanthanides into polymer matrices.

Purpose Of The Study

  • To create novel luminescent hydrogels with enhanced stability and mechanical properties.
  • To investigate the use of dynamic cross-links and Europium(III) ions for improved hydrogel performance.
  • To demonstrate the application of these hydrogels in bacterial monitoring and copper(II) ion detection.

Main Methods

  • Fabrication of hydrogels using three dynamic cross-links: imine bonds, boronate ester bonds, and metal-ligand coordination.
  • Incorporation of Europium(III) ions into a dual-cross-linked matrix of phenylboronic acid-polyethylenimine-modified gelatin (PPG) and alginate dialdehyde (ADA).
  • Utilized a combined freeze-drying-swelling (FDS) and freeze-thawing (FT) treatment to enhance luminescence, stability, and mechanical strength.

Main Results

  • The FDS process created additional europium-carboxylate cross-links, boosting luminescence and stability.
  • The FT process physically strengthened the hydrogel network.
  • The number of FDS-FT cycles significantly impacted hydrogel microstructure and properties.
  • Demonstrated hydrogel efficacy in monitoring bacterial growth and detecting copper(II) ions.

Conclusions

  • The developed luminescent hydrogels exhibit improved stability and mechanical strength due to dynamic cross-linking and Europium(III) incorporation.
  • The FDS-FT treatment is crucial for optimizing hydrogel properties.
  • These hydrogels represent a promising platform for sensitive biosensing and environmental monitoring applications.