4D printing of soybean oil based shape memory polymer and its magnetic-sensitive composite via digital light processing

• Published in: Polymer-plastics technology and engineering Vol. 61; no. 9; pp. 923 - 936
• Main Authors: Huang, Shu, Shan, Mingyuan, Zhang, Hang, Sheng, Jie, Zhou, Jianzhong, Cui, Chengyun, Wei, Jiean, Zhu, Wenlong, Lu, Jinzhong
• Format: Journal Article
• Language: English
• Published: New York Taylor & Francis 13.06.2022; Taylor & Francis Ltd
• Subjects: 4D printing; digital light processing; Iron oxides; magnetic field actuation; Photosensitivity; Polymers; Printing; Recovery; Renewable resources; Shape effects; Shape memory; shape memory polymer; Soybean oil; Tensile strength
• ISSN: 2574-0881; 0360-2559; 2574-089X; 1525-6111
• DOI: 10.1080/25740881.2022.2029891

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-Fe 3 O 4 (AESO/IBOMA/nano-Fe 3 O 4 ) networks. The effects of IBOMA and nano-Fe 3 O 4 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% Fe 3 O 4 can be actuated by a magnetic field and complete an 82.47% shape recovery process in 40 s.