Four-Dimensional Printing of Multifunctional Photocurable\nResin Based on Waste Cooking Oil

Abstract

To\nprovide multifunctional polymer consumables for 4D printing\nand a new methodology for utilizing waste cooking oil (WCO), a type\nof photocurable resin based on WCO was synthesized. This WCO-based\nresin contained epoxy waste oil methacrylate, which is derived from\nWCO, along with 2-phenoxyethyl acrylate (PHEA) and methacrylic acid\n(MAA) as monomers, which were obtained with a light-curing 3D printer.\nThe 4D printing photocurable resin based on WCO comprised a polymeric\nnetwork constructed by WCO, a polymeric PHEA segment, and a polymeric\nMAA segment. It displayed high flexibility (elongation at break: 230.1%),\nfunctional pressure-sensitive adhesion properties (interfacial adhesion\ntoughness: 72.6 J/m² on wood and 58.4 J/m² on\nsteel), as well as good thermally induced shape memory performances\n(deforming and recovering at room temperature; fixing at −12\n°C), which could be potentially used for generating products,\nincluding wearable devices, intelligent devices, biological supports,\nfolding structures, as well as personalized products such as sticker\nsigns, handmade toys, or ornaments.