由甘蔗渣制备用于聚氨酯生产的多元醇的研究  

Preparation of Bio-Polyol for Polyurethane from Liquefied Bagasse

作　　者：刘娟娟[1] 谌凡更[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《造纸科学与技术》2009年第6期95-98,102,共5页Paper Science & Technology

基　　金：国家高技术发展研究计划(2007AA100704);国家自然科学基金(20574022)资助项目

摘　　要：在硫酸的催化作用下,甘蔗渣在聚乙二醇和甘油的混合溶剂中能被液化成生物质多元醇。向液化试剂中加入表面活性剂,利用表面活性剂提高液化试剂对甘蔗渣的渗透能力,改善甘蔗渣的液化效果。主要研究了表面活性剂种类和浓度、液化时间、液固比,液化试剂组成、催化剂浓度等对液化效果的影响。结果表明,吐温-80对甘蔗渣液化的效果最明显,并且在用量为0.25%时,液化效果最好,转化率达99%以上。液化得到的生物质多元醇的羟值为500-700 mg KOH/g。红外光谱分析表明,液化产物中含有大量的可反应羟基,可以作为制备聚氨酯硬泡的多元醇组分。Bagasse was converted into a polyol by the liquefaction in the mixture of polyethylene glycol and glycerin in the acidic condition. The efficiency of liquefaction was improved by the addition of non - ionic surfactant into the liquefying reagent. The effect of the surfactant, the catalyst, the reaction time, the ratio of bagasse to the liquefying solvent and the composition of liquefying reagent on the liquefaction rate was investigated. Among the surfactants used in this study, Tween -80 gave the best performance in improving the liquefaction. The hydroxyl value of liquefaction product varied in the range 500 -700 mgKOH/ g, indicating that the product can be used as the polyol component for preparation of rigid polyurethane foam.

关 键 词：蔗渣 液化 表面活性剂 多元醇 聚氨酯 

分 类 号：O636[理学—高分子化学] TQ323.8[理学—化学]