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Multifunctional 3D printing of heterogeneous hydrogel structures.

Ali Nadernezhad1,2, Navid Khani1,2, Gözde Akdeniz Skvortsov2,3

  • 1Faculty of Engineering and Natural Sciences, Sabanci University, Orhanli-Tuzla, Istanbul, 34956, Turkey.

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Summary

This study introduces a novel multimaterial 3D printing method for hydrogels, enabling the creation of complex structures with diverse chemical, electrical, mechanical, and biological properties for advanced applications.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Engineering

Background:

  • Current multimaterial additive manufacturing (3D printing) of hydrogels is limited in material diversity and functionality.
  • Existing methods often restrict fabrication to single materials or single functionalities.

Purpose of the Study:

  • To develop a novel multimaterial deposition method for hydrogel structures.
  • To demonstrate the capability of producing heterogeneous and multi-functional hydrogel constructs.

Main Methods:

  • A new aspiration-on-demand protocol was developed for assembling hydrogel inks in a liquid state within a glass capillary.
  • In situ gel formation was employed after sequential aspiration of different hydrogel inks.
  • Process and material parameters were tuned to control the properties of printed objects.

Main Results:

  • Successfully printed patterned objects with spatially controlled chemical, electrical, mechanical, and biological properties.
  • Demonstrated the fabrication of heterogeneous hydrogel structures with preserved structural integrity at segment interfaces.
  • Validated the method's potential for creating multi-functional hydrogel constructs.

Conclusions:

  • The novel aspiration-on-demand protocol enables advanced multimaterial additive manufacturing of hydrogels.
  • This technique facilitates the creation of complex, spatially functionalized hydrogel objects.
  • The method holds significant promise for applications in biosensors, flexible electronics, tissue engineering, and organ printing.