Prof. Jinsong Leng is Cheung Kong Chair Professor and Director of the Center for Smart Materials and Structures at Harbin Institute of Technology (China). His researches cover Stimulus Responsive Polymers (Shape Memory and Electro-Active Polymers) and their composites, 4D printing, Sensors and Actuators, Structural Health Monitoring, Multifunctional Nanocomposites, etc. Prof. Leng has served as the Vice President of International Committee on Composite Materials (ICCM), Vice President of Chinese Society for Composite Materials (CSCM). He has also been elected as Foreign Member of Academia Europaea, Member of the European Academy of Sciences and Arts, World Fellow of ICCM, Fellow of AAAS, Fellow of the SPIE, Fellow of IOP, Fellow of RAeS, Fellow of IMMM and Associate Fellow of AIAA.

Title

Shape memory polymer composites and 4D printing for aerospace and biomedical applications

Abstract

Shape memory polymers (SMP) and shape memory polymer composite (SMPC) can automatically deform when actuated by stimulus, which have the advantages of fast response, high rebound rate, light weight, low cost, easy processing and applications in various intelligent structures and devices [1,2]. Four dimensional (4D) printing refers to adding new additive manufacturing technology on the basis of four dimensional time. The four-dimensional printing of SMPs/SMPCs can rapidly manufacture reconfigurable structures in aerospace, medical and other professional fields. Our team has developed a series of 4-D printed SMPs/SMPCs structures, such as bone scaffolds, vascular scaffolds and expandable spatial structures that can change shape or size in outer space. By designing the molecular structure of shape memory polymer and adding special functional fillers, the printing structure can be driven remotely by light, electricity and magnetic field. It believed that 4D technology will continue to bring more and more opportunities in many fields in the next few years.

References

[1] Lin C, Lv J, Li Y, et al. 4D‐Printed Biodegradable and Remotely Controllable Shape Memory Occlusion Devices[J]. Advanced Functional Materials, 2019: 1906569.

[2] Zhao W, Liu L, Leng J, et al. Thermo-mechanical behavior prediction of particulate reinforced shape memory polymer composite[J]. Composites Part B: Engineering, 2019, 179: 107455.

[3] Wei H, Zhang Q, Yao Y, et al. Direct-write fabrication of 4D active shape-changing structures based on a shape memory polymer and its nanocomposite[J]. ACS applied materials & interfaces, 2016, 9(1): 876-883.

[4] Leng J, Lan X, Liu Y, et al. Shape-memory polymers and their composites: stimulus methods and applications[J]. Progress in Materials Science, 2011, 56(7): 1077-1135.