4D printing of soybean oil based shape memory polymer and its magnetic-sensitive composite via digital light processing
Shuping Huang, Mingyuan Shan, Hang Zhang, Jie Sheng, Jianzhong Zhou, Chengyun Cui, Jie’an Wei, Wenlong Zhu, Jinzhong Lu
Abstract
With the awakening of environmental awareness and the development of 4D printing, the availability of renewable materials for 4D printing has become increasingly important. A kind of soybean oil-based photosensitive resins were prepared to fabricate SMP parts with acrylate epoxy soybean oil/isobornyl methacrylate/nano-Fe3O4 (AESO/IBOMA/nano-Fe3O4) networks. The effects of IBOMA and nano-Fe3O4 concentration on mechanical and shape memory properties were systematically studied. The polymer can achieve high curing rate and printing accuracy. Break elongation of SMPs with 40 wt% IBOMA can up to 45.3% and tensile strength of SMPs with 60 wt% IBOMA can reach 44.3 MPa. The tensile-unload test results showed that the shape fixation rate and shape recovery rate of all formulations were higher than 90%. SMPs with 5 wt% Fe3O4 can be actuated by a magnetic field and complete an 82.47% shape recovery process in 40 s.