The product structure was characterized by infrared spectroscopy (IR); the influence factors on alkali lignin based rigid polyurethane foam (RPUF) productivity were analyzed using the isocyanate index with the amount of foam, catalyst, and foam stabilizer as indicators; and the thermal RPUF properties were determined. Refined alkali lignin was obtained after chemical treatment of raw alkali lignin. RPUF was synthesized by the foam method using refined alkali lignin as the alcohol hydroxyl material and isophorone diisocyanate as the reactant. Results showed that RPUF was successfully synthesized with the amount of polyethylene glycol 400 (PEG 400), isophorone diisocyanate, methyl silicone oil, stannous octoate, and n-pentane as well as the isocyanate index all affecting ultimate productivity. Different composition ratios of alternative polyethyleneglycol alkali lignin affected the water absorption rate and thermal properties of RPUF. When the alkali lignin additive was in the 10% - 15% range, the synthesized ligmn-polyurethane foam material parameters met industrial production requirements. Thus, this research could provide a helpful method for complete usage of unused raw alkali lignin. [Ch, 5 fig. 3 tab. 19 ref.]%粗碱木质素经化学处理得到精制碱木质素,精制碱木质素作为醇羟基物料与异佛尔酮二异氰酸酯通过一次发泡法合成制备碱木质素-聚氨酯泡沫功能材料(RPUF),通过红外光谱(IR)表征产物结构,分析异氰酸酯指数、发泡剂、催化热及泡沫稳定剂用量对RPUF产率的影响,并考察了RPUF材料的热性能.结果表明:成功合成RPUF功能材料,聚乙二醇(PEG 400)、异佛尔酮二异氰酸酯、甲基硅油、辛酸亚锡和正戊烷用量及异氰酸酯指数均影响最终产物得率;替代聚乙二醇的碱木质素比例不同,合成制备RPUF的吸水率、热学性能表现相异；合成反应中碱木质素添加剂量范围为10％～15％时,合成碱木质素-聚氨酯泡沫功能材料的各项参数符合工业生产要求.本研究可为充分利用粗碱木质素制备相关功能材料提供有益参考.图5表3参19
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