Reactive inkjet printing of polyethylene glycol and isocyanate based inks to create porous polyurethane structures

Abstract

ABSTRACTReactive inkjet printing offers a direct way to create polymeric structures in situ on a substrate. Therefore, two component polyurethane formulations can be utilized to be used in multicomponent inkjet printing. In this contribution, the use of polyethylene glycol (M = 200 g mol−1), glycerol ethoxylate (M = 1,000 g mol−1), and water (blowing agent) in combination with aliphatic 1,6‐hexamethylene diisocyanate or aromatic methylene diphenyl diisocyanate for reactive inkjet printing is evaluated. The inks are jettable on a Dimatix DMP‐3000 inkjet printer using a 10 pL piezo driven drop‐on‐demand printhead showing stable droplet formation. Solid films on glass are formed using a drop‐by‐drop printing strategy. Layer‐by‐Layer strategy gives best results on polycarbonate substrates forming porous polyurethane structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46977.