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Growth Induced Bending using PET-RAFT.pdf (1004.18 kB)

3D Printing and Growth Induced Bending based on PET-RAFT Polymerization

submitted on 16.04.2020, 05:23 and posted on 20.04.2020, 06:52 by Chris Bainbridge, Kyle Engel, Jianyong Jin
4D printing has steadily become an emerging area of advanced manufacturing research and has produced some truly fantastic innovations. Previously we have demonstrated the 3D printing process based on PET-RAFT polymerization, and its subsequent capability in the post-production modification of surface properties. In this work, (1) we further optimized the PET-RAFT 3D printing formulation by replacing RAFT agent CDTPA with BTPA and adjusting the monomers composition; (2) we also observed the photodegradation of the photocatalysts EB and EY under 405nm light and the effects this has on 3D printing; (3) we then did successful 3D printing using a commercial 405nm DLP 3D printer, with an improved build speed of up to 2286 µm/hr; (4) lastly, for the first time we have demonstrated a method for growth induced bending of a 3D printed strip, where the growth on one side of the strip causes stress and the strip bends accordingly to reach a more comfortable position.


New Zealand Ministry of Business, Innovation and Employment (MBIE) Endeavour Fund for funding the Advanced Laser Microfabrication for NZ Industries research programme (UOAX-1701)


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University of Auckland, School of Chemical Sciences


New Zealand

ORCID For Submitting Author


Declaration of Conflict of Interest

The authors declare no conflict of interest.