Researchers at the University of North Carolina at Chapel Hill have developed a hydrogel material that can change shape at predetermined rates, without external triggers like light, heat, or water. As their proof of concept, the team created a hydrogel flower that bloomed over a two-hour span. Within the closed system of the human body, the ability of this hydrogel to autonomously shapeshift over a predetermined time range is a big advantage. Leveraged in conjunction with 3D printing, biomedical implants could be designed to change size and shape as needed.
Read more here.