摘要
利用微波加热,使甘蔗渣在多羟基醇中快速液化,得到植物纤维基多元醇。主要研究了微波辐照时间和不同反应温度对液化效果的影响,并且比较了微波加热液化甘蔗渣与传统油浴加热液化的区别。结果表明,在160℃下微波辐照25min,液化的转化率达99%以上,而油浴液化要达到相同转化率,保温时间长达120min。微波加热所得的液化产物的羟值为293 mg KOH/g,质均相对分子质量为3490。
Bagasse was liquefied by microwave heating in a mixture of polyethylene glycol and glycerin as the liquefying reagents under the atmospheric pressure,and the liquefaction behavior was compared with that by conventional oil bath heating.The effects of the irradiation time and the liquefaction temperature by microwave heating were investigated in the paper.The conversion ratio reached to 99.99% at 160℃ in 25 minutes by microwave heating,while the same result was obtained in 120 minutes by oil bath heating.However,the hydroxyl number of liquefaction product heated by microwave for 30 min was 293 mg KOH/g,and the weight-average molecular weights（Mw） was 3940.
出处
《造纸科学与技术》
北大核心
2011年第4期21-23,42,共4页
Paper Science & Technology
基金
广东省科技计划项目(2010B010900031)
关键词
微波
液化
甘蔗渣
microwave heating
liquefaction
bagasse
