MIT makes 3D printer with objects that have a memory

MIT researchers are using a new 3D printing process to create tiny structures that change shape at specific temperatures.

A shape-memory Eiffel tower was 3-D printed using projection microstereolithography. It is shown recovering from being bent, after toughening on a heated Singapore dollar coin.
3D printing turns digital 3D models into solid objects by building them in layers. Although, this technology was developed back in the 1980’s; it has started evolving into a next-generation manufacturing technology in the recent past.

A group of MIT researchers along with Singapore University of Technology and Design (SUTD) created tiny structures that can engage shape at specific temperatures. Combining a new 3D printing process, microstereolithography, with a specific polymer mix; they have been able to create structures that can remember specific shapes. In other words, these three dimensional structures hold the ability to spring back to their original shape forms within seconds of being heated at a certain temperature.

Nicholas X. Fang, associate professor of mechanical engineering at MIT, says shape-memory polymers that can predictably morph in response to temperature can be useful for a number of applications, from soft actuators that turn solar panels toward the sun, to tiny drug capsules that open upon early signs of infection.

“We ultimately want to use body temperature as a trigger,” Fang says. “If we can design these polymers properly, we may be able to form a drug delivery device that will only release medicine at the sign of a fever.”

However, the team isn’t quite there yet. With time and investment, they hope to reach the stage of transforming their vision into reality.