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Embedding Carbon Dots in Superabsorbent Polymers for Additive Manufacturing.

Yiqun Zhou1, Keenan J Mintz2, Cagri Y Oztan3

  • 1Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA. YXZ431@miami.edu.

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Summary

Orange carbon dots (O-CDs) were successfully embedded into sodium polyacrylate (SPA) for 3D printing applications. This novel photoluminescent ink demonstrates potential for additive manufacturing, marking a first for bare carbon dots in 3D printing.

Keywords:
3D printingadditive manufacturingcarbon dotsembedmentsolvent effectsuperabsorbent polymer

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photochemistry

Background:

  • Carbon dots (CDs) are fluorescent nanomaterials with tunable optical properties.
  • Sodium polyacrylate (SPA) is a superabsorbent polymer with potential for material embedding.

Purpose of the Study:

  • To develop a novel photoluminescent ink for 3D printing using orange carbon dots (O-CDs) and sodium polyacrylate (SPA).
  • To investigate the properties and 3D printability of O-CDs embedded in SPA.

Main Methods:

  • Synthesized O-CDs using citric acid and 1,2-phenylenediamine via ultrasonication.
  • Embedded O-CDs into SPA to create a printable ink.
  • Characterized O-CDs and the resulting ink using various analytical techniques.
  • Utilized 3D printing to fabricate photoluminescent objects.

Main Results:

  • Spherical O-CDs (~2 nm) exhibited excitation-independent, solvent-dependent emission.
  • O-CDs showed even distribution and low aggregation in SPA due to its water-absorbing properties.
  • 3D printed photoluminescent objects were successfully fabricated with high potential for additive manufacturing.

Conclusions:

  • This study introduces the first use of bare carbon dots as a photoluminescent material in 3D printing.
  • Sodium polyacrylate is reported for the first time as a 3D printing material.
  • The developed O-CDs/SPA ink shows promise for high-yield applications in additive manufacturing.