半纤维素及其聚醚多元醇的制备与表征

Preparation and Characterization of Hemicellulose-Based Polyether Polyol

以粘胶废液中提取的半纤维素和甘油为起始剂,与环氧丙烷(PO)进行开环反应,制备了半纤维素基聚醚多元醇。确定了适宜的反应条件,得到的半纤维素基聚醚羟值为244~302mg KOH/g。通过热重分析发现,半纤维素基聚醚热稳定性比原料半纤维素有所提高;对半纤维素基聚醚多元醇用于聚氨酯硬泡的发泡性能评价发现,其可以替代质量分数0~50%的聚醚4110A。

Focusing on the comprehensive utilization of waste resources, the hemicellulose, extracted from vis- cose waste liquid, and glycerol were utilized as starting materials and reacted with propylene oxide （PO） by ring-o- pening reactions. The resulting products, hemicellulose-based polyether polyols, were identified by ]R and NMR and optimized with hydroxyl value of 244-302 mgKOH/g. Comparing with the hemicellulose, hemicellulose-based polyether polyols had been proven that their thermal stabilities were improved. According to polyurethane foam per- formance evaluation, hemicellulose-based polyether polyols could replace 0- 50% of the amount of 4110A. Overall, the tested materials had been proven to have good application prospects and open up a high-value utilization routes, which were suitable for industrial promotion and for the treatment of viscose fiber industrial waste liquid.