Study on 4D Printing Shape Memory Polymers in the Field of Biomedical Progress

Shape memory polymers are intelligent materials that produce shape changes under external stimulus conditions, and 4D printing is based on deformable materials and 3D printing. A comprehensive technology, shape memory polymer in deformable materials is the most widely used, and the current 4D printing shape memory polymer is in various collars. The domain has applications, especially in the biomedical field, which has excellent application value. 4D printing technology breaks through the personalized technology in traditional medicine. The bottleneck provides a new opportunity for the further development of the biomedical field. This article first reviews shape-memory polymers, 3D printing technology, and 4D printing. We will review the research progress of shape memory polymers at home and abroad and introduce examples of 4D printed shape memory polymers in biomedicine. Finally, the application prospects, existing problems, and future development directions of 4D printed shape memory polymers in the biomedical field are summarized