Give this 3D printed plastic some light, it will bloom automatically

A team of researchers at Nanyang Technological University in Singapore developed a 3D printed flower with a shape memory composite and a light-sensitive substance that automatically blooms when exposed to light. The study has been published in the journal Advanced Materials, entitled "3D Printing Photosensitive Devices Based on Shape Memory Composites."

Objects that can change in 3D printing are often referred to as 4D printing and are becoming more and more popular. Now, Nanyang Polytechnic researchers are looking to use their own 4D printing technology in such areas as bionics and soft robots.

3D printing flowers are made of a modified polyurethane material with shape memory properties (mixed with a small amount of carbon black, a photosensitive material). When exposed to light, carbon black generates heat, which activates the shape memory of polyurethane. Behave to change the plastic flower back to its original shape. When exposed to the sun or a xenon lamp, the 3D print flower blooms in a few minutes.

“External illumination triggers the shape recovery of the 3D printing device, changing it from a temporary shape back to its original shape. The effect of material thickness and optical density on the shape memory behavior of 3D printing devices has been quantified and calculated. It is worth noting that the sun is also Will trigger the shape memory behavior of these 3D printing devices," the paper abstract writes.

(Compiled from 3ders.org)

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