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A New Framework for 3D Printing Aerogels with Additives: Hardware and Ink Development.

Jhan Luke Okkabaz1, Saeid Darvishi2, Işık Sena Akgün3

  • 1College of Science and Engineering, University of Minnesota, 100 Church Street SE, Minneapolis, Minnesota 55455, United States.

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Summary
This summary is machine-generated.

This study presents a 3D printing method for creating titanium dioxide (TiO2) infused aerogels. These functional aerogels offer a scalable pathway for advanced applications in catalysis and environmental remediation.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • 3D printing enables custom material fabrication.
  • Aerogels offer unique properties but are challenging to print.
  • Incorporating nanoparticles enhances aerogel functionality.

Purpose of the Study:

  • To develop a 3D printing method for titanium dioxide (TiO2) nanoparticle-infused aerogels.
  • To optimize aerogel ink formulation for precise printing.
  • To explore applications in photocatalysis and environmental remediation.

Main Methods:

  • Adapted a commercial 3D printer with a custom syringe pump for aerogel ink extrusion.
  • Formulated a shear-thinning silica aerogel ink with homogeneous TiO2 nanoparticle dispersion (50 wt %).
  • Utilized ammonia vapor gelation and supercritical CO2 drying for postprocessing.

Main Results:

  • Achieved 3D printing of aerogel structures with <1 mm precision.
  • Fabricated aerogels with high specific surface area (407 m²/g) and low density (0.15 g/cm³).
  • Demonstrated shear-thinning behavior (viscosity drop from 10,000 Pa·s to 1 Pa·s) for smooth extrusion.

Conclusions:

  • Developed a scalable and cost-effective 3D printing approach for functional aerogels.
  • The TiO2-infused aerogels show promise for catalysis, thermal insulation, and environmental remediation.
  • This methodology allows for tailored aerogel properties through precise structural control.