Microfluidic Printheads for Multimaterial 3D Printing of Viscoelastic Inks

Multimaterial 3D printing using microfluidic printheads specifically designed for seamless switching between two visco-elastic materials "on-the-fly" during fabrication is demonstrated. This approach opens new avenues for the digital assembly of functional matter with controlled compositional and property gradients at the microscale.

[1]  Robert F. Shepherd,et al.  Direct‐Write Assembly of 3D Hydrogel Scaffolds for Guided Cell Growth , 2009 .

[2]  John J. Vericella,et al.  High‐Throughput Printing via Microvascular Multinozzle Arrays , 2013, Advanced materials.

[3]  J. Lewis,et al.  Conformal Printing of Electrically Small Antennas on Three‐Dimensional Surfaces , 2011, Advanced materials.

[4]  Jennifer A. Lewis,et al.  3D Printing: 3D‐Printing of Lightweight Cellular Composites (Adv. Mater. 34/2014) , 2014 .

[5]  Neri Oxman,et al.  Variable property rapid prototyping , 2011 .

[6]  John A. Rogers,et al.  Omnidirectional Printing of Flexible, Stretchable, and Spanning Silver Microelectrodes , 2009, Science.

[7]  Christopher W. Macosko,et al.  Rheology: Principles, Measurements, and Applications , 1994 .

[8]  Christopher M Spadaccini,et al.  Photocurable Liquid Core–Fugitive Shell Printing of Optical Waveguides , 2011, Advanced materials.

[9]  J. Lewis,et al.  Microperiodic structures: Direct writing of three-dimensional webs , 2004, Nature.

[10]  Howard A. Stone,et al.  ENGINEERING FLOWS IN SMALL DEVICES , 2004 .

[11]  Daniel M. Vogt,et al.  Embedded 3D Printing of Strain Sensors within Highly Stretchable Elastomers , 2014, Advanced materials.

[12]  Philippe Coussot,et al.  Saffman–Taylor instability in yield-stress fluids , 1999, Journal of Fluid Mechanics.

[13]  J. Lewis,et al.  3D Microperiodic Hydrogel Scaffolds for Robust Neuronal Cultures , 2011, Advanced functional materials.

[14]  M. Leu,et al.  Hybrid Extrusion Force-Velocity Control Using Freeze-Form Extrusion Fabrication for Functionally Graded Material Parts , 2013 .

[15]  J. Lewis,et al.  3D Bioprinting of Vascularized, Heterogeneous Cell‐Laden Tissue Constructs , 2014, Advanced materials.

[16]  Joseph Cesarano,et al.  Colloidal inks for directed assembly of 3-D periodic structures , 2002 .

[17]  J. Lewis,et al.  3D Printing of Interdigitated Li‐Ion Microbattery Architectures , 2013, Advanced materials.

[18]  R. Rosenfeld.  Nature , 2009, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.