Embedded Direct Ink Writing 3D Printing of UV Curable Resin/Sepiolite Composites with Nano Orientation

Area of Science:

• Materials Science
• Nanotechnology
• Additive Manufacturing

Background:

• Direct ink writing (DIW) is a 3D printing method sensitive to material microstructure and properties.
• High nanoparticle concentrations in nanocomposites pose dispersion and property challenges.
• Limited research exists on low-viscosity nanocomposites (<5 phr) compared to high-viscosity ones (>20 wt %).

Purpose of the Study:

• To investigate the effect of anisotropic particle alignment on the properties of low-viscosity nanocomposites using DIW.
• To explore the rheological behavior changes in a silicone oil/fumed silica matrix with aligned sepiolite (SEP).
• To clarify the synergistic effects of SEP alignment in photocurable nanocomposites for enhanced physical properties.

Main Methods:

• Utilizing direct ink writing (DIW) for 3D printing of nanocomposites.
• Incorporating anisotropic sepiolite (SEP) nanoparticles at low concentrations (less than 5 phr).
• Employing a silicone oil complexed with fumed silica as the printing matrix.
• Investigating the rheological behavior and physical properties of the resulting nanocomposite.

Main Results:

• Anisotropic sepiolite (SEP) alignment significantly influences the rheological behavior of low-viscosity inks.
• Improved physical and mechanical properties are observed in nanocomposites with aligned SEP particles.
• The study demonstrates the synergistic effect of SEP alignment in photocurable nanocomposites.

Conclusions:

• Anisotropic particle alignment is a viable strategy to enhance the properties of low-viscosity nanocomposites fabricated via DIW.
• The findings suggest potential for improved mechanical properties compared to conventional methods like digital light processing.
• This research contributes to understanding nanoparticle alignment in 3D printing for advanced material development.