二醋酸纤维素的碱降解性能  

Degradation Properties of Alkali-Treated Diacetate Fiber

作　　者：张文娟[1] 王东伟[2] 王善元[1] 

机构地区：[1]东华大学纺织学院,上海201620 [2]中原工学院纺织学院,河南郑州450007

出　　处：《纤维素科学与技术》2008年第1期45-49,共5页Journal of Cellulose Science and Technology

基　　金：河南省郑州市科技攻关计划项目(0623022000)

摘　　要：研究了室温下醋酸纤维素在各种浓度的氢氧化钠溶液中的降解行为。红外光谱分析显示,醋酸纤维素在碱溶液中的重量损失主要是由于脱乙酰化作用。扫描电子显微镜照片显示,在碱处理后的醋酸纤维素表面光滑,没有出现溶解和脱落,可能是由于生成了碱纤维素。5 mol/L的氢氧化钠处理后,可观察到微纤化结构。纤维强力的测试结果表明,随着碱液浓度的增加,纤维的强力和模量降低,断裂伸长增加,可能是由于降解后微纤非纵向排列的结果。Researches on degradative behavior of diacetate fibers in sodium hydroxide solutions of various concentrations at room temperature. Infrared spectral analysis indicates that in the case of NaOH solutions, the weight loss of the cellulose acetate （CA） composition is under the control of deacetylation. The scanning electron microscope （SEM） photographs show that the surface of the fiber is slippery after degradation, there is no dissolving and shedding, it seems that CA becomes alkali cellulose. Microfibril structure after disposing in 5 mol/L NaOH can be observed. The mightiness testing result indicates that the stress and modulus of the fiber reduces with the NaOH concentration is increased, but the elongation becomes larger, it is the result of the no-longitudinal arranging ofmicrofibril after degradation.

关 键 词：醋酸纤维素 碱降解 力学性能 

分 类 号：O636.11[理学—高分子化学] TS101.921[理学—化学]