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Nanoengineered Colloidal Inks for 3D Bioprinting.

Charles W Peak1, Jean Stein1, Karli A Gold1

  • 1Biomedical Engineering and ‡Material Science and Engineering, Dwight Look College of Engineering, and §Center for Remote Health Technologies and Systems, Texas A&M University , College Station, Texas 77843, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 6, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed new shear-thinning bioinks using nanoengineered hydrogels (Laponite and poly(ethylene glycol)). These bioinks enable complex 3D bioprinting with high cell viability, offering a promising tool for tissue engineering and cell delivery applications.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Hydrogels are crucial for 3D bioprinting, but developing suitable bioinks with desired properties remains challenging.
  • Shear-thinning and self-healing properties are essential for precise bioink extrusion and maintaining printed structure integrity.

Purpose of the Study:

  • To synthesize and characterize novel colloidal bioinks based on Laponite (2D nanosilicates) and poly(ethylene glycol) (PEG).
  • To evaluate the suitability of these PEG-Laponite bioinks for 3D bioprinting complex structures with high cell viability.

Main Methods:

  • Synthesis of colloidal bioinks by combining Laponite nanoparticles with PEG.
  • Rheological characterization to assess shear-thinning, viscosity, and self-recovery properties.
  • 3D bioprinting of complex patterns and evaluation of mechanical properties and encapsulated cell viability.

Main Results:

  • PEG-Laponite bioinks exhibited significant shear-thinning and self-recovery behavior.
  • The addition of Laponite enhanced the mechanical properties and stability of the PEG network.
  • Complex 3D structures were successfully printed with mechanical properties comparable to the bulk material.
  • Encapsulated cells demonstrated high viability post-bioprinting.

Conclusions:

  • A new class of PEG-Laponite colloidal bioinks has been developed for advanced 3D bioprinting.
  • These bioinks offer excellent printability and support cell viability, making them suitable for cell delivery and tissue engineering.
  • The nanoengineered hydrogel approach provides a versatile platform for designing next-generation biomaterials.