Harvard Develops 3D Printing Method for Soft Robots With Built-In Shape-Morphing Channels
Researchers at Harvard's School of Engineering published a method in Advanced Materials for 3D printing soft robotic devices with precisely placed hollow channels that bend and deform in predetermined ways when filled with air. The technique, called rotational multimaterial 3D printing, extrudes two materials from a single nozzle — a polyurethane shell and a dissolvable inner channel — eliminating the need for traditional molds and casting. The team demonstrated a five-digit gripper with bendable knuckles and a flower pattern printed in one continuous path. The approach could accelerate production of soft robots for surgical assistance, home caregiving, and safe human-robot interaction — areas where rigid robots pose injury risks.
