Xylose Residue Synthesized Bio-polyols for Polyurethane Foam Preparation
This study used xylose residue as the raw material,with polyethylene glycol and glycerol as modifiers. Under specific conditions,the xylose residue was liquefied to prepare polyols,which were then used to produce polyurethane foam by adding water and cyclopentane as blowing agents,along with a catalyst,a polyurethane foam stabilizer,and polyisocyanates in a set ratio. By exploring the effect of the amounts of blowing agents,polyurethane stabilizers,and catalysts on the foaming process,a material formulation was developed,and the foam performance was optimized,addressing the key issue of slow polyurethane foam formation. The results showed that under the optimal ratio for water-based foaming,the compressive strength reached 257 kPa,while the optimal ratio using cyclopentane as the blowing agent achieved a compressive strength of 320 kPa. Additionally,adjusting the catalyst ratio and the pH value of the polyol significantly improved the foaming speed of the polyurethane foam. In water-based foaming,when the KOH content was 0.55％,the foam initiation time shortened from 120 s to 50 s,and the foaming time reduced from 170 s to 90 s. For the polyurethane foam with cyclopentane as the blowing agent,when the KOH content was 0.69％,the foam initiation time decreased from 104 s to 52 s,and the foaming time was reduced from 101 s to 80 s.
万方数据
维普
