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This study developed 3D printable, conductive hydrogel scaffolds using methacrylated chitosan (ChiMA) and graphene. These biocompatible materials enhance cell growth and offer improved mechanical and electrical properties for tissue engineering applications.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Nanotechnology

Background:

  • Conductive scaffolds are crucial for electroresponsive cell growth in tissue engineering.
  • Biocompatible and mechanically robust materials are needed for 3D scaffold fabrication.

Purpose of the Study:

  • To synthesize and 3D process UV-crosslinkable, conductive, and cytocompatible hydrogels.
  • To investigate the effect of chemically converted graphene on hydrogel properties and cell behavior.
  • To create 3D printed multilayer scaffolds with enhanced characteristics.

Main Methods:

  • Synthesis of methacrylated chitosan (ChiMA) hydrogels.
  • Incorporation of chemically converted graphene into the ChiMA matrix.
  • 3D printing of hydrogel constructs using UV-crosslinking.
  • Assessment of mechanical, electrical, and cytocompatibility properties.

Main Results:

  • Graphene addition significantly improved mechanical and electrical properties of ChiMA hydrogels.
  • Enhanced adhesion, proliferation, and spreading of L929 fibroblasts were observed.
  • 3D printed multilayer scaffolds exhibited superior mechanical performance.

Conclusions:

  • Chemically converted graphene/ChiMA hydrogels are promising for creating advanced tissue engineering scaffolds.
  • The developed materials support electroresponsive cell growth and offer tunable properties.
  • UV-crosslinkable and 3D printable conductive hydrogels represent a significant advancement in the field.