Gharib, JaberPang, ShushengHolland, Daniel2020-06-022020-06-022020Gharib J, Pang S, Holland D (2020). Synthesis and characterisation of polyurethane made from pyrolysis bio-oil of pine wood. European Polymer Journal. 109725-109725.0014-3057https://hdl.handle.net/10092/100180This paper investigates the manufacture of polyurethane from pyrolysis bio-oil produced from radiata pine wood. Liquid-liquid extraction was used to separate bio-oil into fractions. These fractions were reacted with methylene diphenyl diisocyanate (MDI) to produce polyurethane. For comparison, a series of polyurethanes were prepared with castor oil in a similar manner. Among the various fractions of the bio-oil, the water-insoluble fraction (often referred to as pyrolytic lignin) was found to be the most appropriate component to produce polyurethane as it is a significant fraction of bio-oil and has a high hydroxyl number, hence, is able to produce a robust film. It was found that gradual addition of the polyol to MDI helped produce a more flexible and stable polyurethane film. Water absorption of bio-oil based polyurethane was found to be higher than that of castor oil based polyurethane. However, the diffusion coefficient of water in the bio-oil derived polyurethane was lower than in castor oil-derived polyurethane. These results suggest bio-oil derived polymers may be suitable for use as protective coatings.enAll rights reserved unless otherwise statedJournal Article2020-05-15Field of Research::09 - Engineering::0904 - Chemical Engineering::090499 - Chemical Engineering not elsewhere classifiedFields of Research::40 - Engineering::4016 - Materials engineering::401609 - Polymers and plasticsFields of Research::30 - Agricultural, veterinary and food sciences::3007 - Forestry sciences::300705 - Forestry biomass and bioproductshttps://doi.org/10.1016/j.eurpolymj.2020.109725