Plant oil-based non-isocyanate waterborne poly(hydroxyl urethane)s

Abstract

With the increasingly depletion of the petroleum resources and awareness of the importance of environmental issues, a quest for a newer, safer and greener route for plant oil-based non-isocyanate waterborne polyurethanes is becoming one of the major challenges in the polyurethanes industry. In this study, the carbonated linseed oil (CLSO) was prepared from epoxy linseed oil, which was used to polymerize with different diamines and hydrophilic moiety to produce green and safety cationic, anionic and nonionic plant oil-based non-isocyanate waterborne poly(hydroxyl urethane)s (NIWPUs). Meanwhile, aromatic diamines, aliphatic diamines and polyether diamines were used as chain extenders to tailor the performance of the resulting plant oil-based NIWPUs, which also further evaluate the robustness of the proposed preparation route. The results showed that all the NIWPU dispersions exhibited excellent storage stability. The cationic NIWPU films showed good mechanical properties (the highest tensile property was more than 9 MPa and the highest elongation at break was more than 200 %) and antibacterial properties (antibacterial efficiency toward Staphylococcus aureus and Escherichia coli above 98 %), anionic NIWPU films exhibited good mechanical properties (the highest tensile property was more than 8 MPa and the highest elongation at break was more than 300 %) and coating performance (the highest pencil hardness was 7H and the highest crosshatch adhesion was 5B), and nonionic NIWPUs showed tailorable cloud points. The technique reported here offers a number of advantages, including low cost, easy performance, environmentally friendly and economical process, opening new platform for the production of NIWPUs prepared from plant oil.