Synthesis of biomass-derived bottom waste ash based rigid biopolyurethane composite foams: Rheological behaviour, structure and performance characteristics

摘要: Abstract This paper reports a novel type of rigid biopolyurethane composite foam based on rapeseed oil polyol and biomass-derived bottom waste ash (WA) for thermal insulation applications. It is shown that biopolyol premixes with various amounts WA are characterised by slightly increased dynamic viscosity, from 115 mPa·s to 289 mPa·s. Moreover, particles absorb part the heat generated reaction reduce temperature 31 °C, thus inhibiting string-gel tack-free times. The makes them possible nucleation sites. Therefore average cell size an 2.4 times conductivity when measured 1 day after production – approximately 3.6% compared control foam. Furthermore, moisture-mechanical properties show increases water absorption due unburnt carbon in WA. reduced closed content compressive strength ∼14% 20 wt% used.