A microfluidic printhead with integrated hybrid mixing by sequential injection for multimaterial 3D printing

Extrusion-based 3D printing is often performed using a single ink or switching between two or more inks. The ability to create compositional variation in-situ by rapid mixing of two different inks inside the printhead with dynamically changing ratios can produce a broad palette of material composition that is useful in making functionally graded materials for applications in soft robotics or integrated sensors. However, rapid mixing of high …