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Grayscale Color 3D/4D Printing via Orthogonal Photochemistry.

Yahui Lu1, Chenkai Zhang1, Tao Xie1

  • 1State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.

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Summary
This summary is machine-generated.

This study introduces a novel 3D/4D color printing method using a specialized photoprintable resin. The technique efficiently produces complex colored 3D objects by decoupling printing and coloration processes.

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Polymer Chemistry

Background:

  • Coloration is vital for aesthetics and communication but challenging for complex 3D surfaces.
  • Manufacturing colored 3D printed products with arbitrary surfaces presents significant hurdles.

Purpose of the Study:

  • To develop an efficient method for 3D/4D color printing of geometrically complex objects.
  • To enable designable surface color patterns on 3D printed products.

Main Methods:

  • Utilized a photoprintable resin with a free radical initiator, photocurable monomers, a photoacid generator, and an acid-sensitive dye.
  • Employed a dual-wavelength light approach: 405 nm for 3D/4D photoprinting and 365 nm for activating the photoacid generator and dye.
  • Decoupled the 3D/4D printing process from the coloration step.

Main Results:

  • Successfully achieved 3D/4D photoprinting of complex geometries.
  • Enabled independent control over printing and coloration, allowing for designable surface color patterns.
  • Demonstrated an efficient and simple method for producing colored 3D objects.

Conclusions:

  • The developed 3D/4D color printing technique offers a highly efficient and versatile solution for manufacturing colored 3D objects.
  • This approach overcomes limitations in coloring complex surfaces, paving the way for advanced applications in various fields.