Zeolite‐Reinforced Interpenetrating Polymer Network Initiated by Chalcone Based Photoinitiating System and Their Application in 3D/4D Printing

With the rapid development of photopolymerization, search for new near-UV/visible light sensitive photoinitiating system (PIS) is one most interesting topics in polymerization area. In this work, a PIS (chalcone dye/amine/iodonium salt) could efficiently and simultaneously initiate free radical photopolymerization polyethylene glycol diacrylate (PEGDA) cationic (CP) 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate (EPOX) upon LED@405 nm irradiation to obtain interpenetrating polymer network (IPN). Furthermore, was employed LTA-5A zeolite filled composites (IPN, PEGDA/EPOX). Compared pure IPN, depth cure (DOC) IPN with 50 wt% remarkably increased by ca. 90%, which first time reported that DOC increase filler content. 3D patterns good resolution were manufactured through direct laser write technique, those high contents showed water swelling property. Under hydrothermal stimuli, composite exhibited 4D printing behavior. Therefore, not only chalcone dye has photoinitiation ability but also resulting prepared containing have potential applications 3D/4D preparation.