| Abstract:In this study, xylose residue was used as raw material, polyethylene glycol and glycerol as modifier, liquefaction under specific conditions to prepare xylose residue polyol, water and cyclopentane as blowing agent, and proportionately added catalyst, polyurethane foaming agent and polyisocyanate to prepare polyurethane foam. By exploring the influence of the amount of foaming agent, polyurethane foaming agent and catalyst on the foaming process, the formulation of composite material was developed, and the foam performance was optimized, and the key problem of slow foaming speed of xylose residue polyol was solved. The results showed that the compressive strength reached 257 kPa under aqueous foaming, and 320 kPa under cyclopentane foaming agent. At the same time, adjusting the proportion of catalyst and pH value of polyol significantly increased the foaming speed of polyurethane foam. With the addition of KOH to 60 mg, the foaming time was shortened from 120 s to 50 s, and the foaming time was shortened from 170 s to 90 s. When the amount of KOH increased to 75 mg, the foaming time decreased from 104 s to 52 s, and the foaming time decreased from 101 s to 80 s. |