气—固反应法酯化改性纤维素  

Modification of Cellulose via Gas-solid Esterification Reaction

作　　者：张秀成[1] 邓长勇[1] 刘文广[1] 李斌[1] 

机构地区：[1]黑龙江省阻燃材料分子设计与制备重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2010年第10期99-102,共4页Journal of Northeast Forestry University

基　　金：黑龙江省自然科学基金项目资助(B200714)

摘　　要：通过气—固反应,利用顺丁烯二酸酐(MA)对纤维素进行了酯化改性。元素分析和红外光谱分析(FTIR)表明MA与纤维素发生了酯化反应。依据质量增加百分率(Wpg)和取代度(Ds)的测定结果确定了酯化反应条件:m(MA)∶m(纤维素)=1.2∶1.0,反应温度150℃,反应时间2.5h,催化剂用量10%,在此条件下酯化纤维素相对纤维素质量增加45%,Ds为0.8。热重分析(TGA)表明,酯化纤维素的热稳定性相对纤维素有所降低,但残留量明显提高,在高温条件下更为稳定。X射线衍射(XRD)表明,酯化反应使得纤维素的结晶度下降,但没有改变纤维素的构型。Cellulose was esterified by maleic anhydride（MA）in a gas-solid reaction system with the esterification confirmed via element analysis and FTIR.The reaction conditions were obtained as ratio of MA to cellulose 1.2∶1.0,reaction temperature 150℃,reaction time 2.5h and dosage of catalyst 10 percent in terms of weight percent gain（WPG）and degree of substitution（DS）.WPG and DS reached 45 percent and 0.8 respectively under these conditions.TGA and XRD indicate that thermal stability of the esterified cellulose is lower than that of cellulose at low temperature but is higher at high temperature,and the esterified cellulose is less crystalline than cellulose but the configuration of fibers is not changed.

关 键 词：纤维素 顺丁烯二酸酐 气—固反应 

分 类 号：TQ352[化学工程]