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Related Experiment Video

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Fragmenting Bulk Hydrogels and Processing into Granular Hydrogels for Biomedical Applications
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Injectable Granular Hydrogels with Multifunctional Properties for Biomedical Applications.

Joshua E Mealy1, Jennifer J Chung2, Heon-Ho Jeong3

  • 1Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, Philadelphia, PA, 19104, USA.

Advanced Materials (Deerfield Beach, Fla.)
|March 31, 2018
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Summary

New injectable hydrogels utilize guest-host chemistry for shear-thinning and self-healing properties. These advanced materials allow tailored degradation and complex molecule release for biomedical applications.

Keywords:
biomaterialsdrug deliveryhydrogelsmicrofluidicsmicrogels

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Injectable hydrogels are crucial for drug delivery and 3D bioprinting.
  • Current hydrogels have limitations in complexity and tailored functionalities.
  • Developing advanced injectable hydrogels is essential for expanding biomedical applications.

Purpose of the Study:

  • To develop novel shear-thinning and self-healing granular hydrogels.
  • To utilize guest-host chemistry for microgel interactions and tunable properties.
  • To investigate complex release and degradation behaviors of mixed microgel formulations.

Main Methods:

  • Synthesized microgels with tailored crosslinking chemistry for controlled degradation (e.g., protease-sensitive).
  • Incorporated guest-host chemistry to enable shear-thinning and self-healing properties.
  • Formulated injectable hydrogels by mixing microgels of varied compositions.

Main Results:

  • Achieved injectable hydrogels exhibiting shear-thinning and self-healing capabilities.
  • Demonstrated tunable microgel properties, including controlled degradation and molecule release kinetics.
  • Observed complex and programmable release and degradation profiles upon mixing different microgel formulations.
  • Confirmed successful cellular invasion into the hydrogel matrix post-injection, indicating biocompatibility.

Conclusions:

  • Developed advanced injectable granular hydrogels with tunable properties via guest-host chemistry.
  • Demonstrated the potential of these hydrogels for complex therapeutic delivery and tissue engineering scaffolds.
  • Highlighted the versatility of microgel formulation for achieving sophisticated material behaviors in biomedical contexts.