纤维素科学与技术2012，Vol.20Issue(1)：26-32,38,8.
缓冲溶液对TEMPO/NaClO/NaBr选择性氧化纤维素的影响
Effects of Buffer Solution on TEMPO-Mediated Oxidation
摘要
Abstract
TEMPO-mediated oxidation has been reported to effectively convert C6 primary hydroxyl groups to carboxyl groups for better water-solubility.However,the pH decreases continuously during the oxidation process,and it is therefore difficult to maintain the stability of the reaction.The control of pH at a constant level throughout the oxidation process is a complicated task.The applicability of the carbonate buffer system and the borax buffer system with various dropping rate of sodium hypochlorite solution was considered.Both two kinds of buffer solutions provide a stable and mild environment to ensure the quality of products without interfering with the oxidation process.Experimental results showed that the carboxyl content of oxidized cellulose in buffer system increased by 20% to 25% compared with traditional methods.For cellulose,the borax buffer solution can promote mass transfer and accelerate penetration of reaction solution.In order to enhance the performance of buffer solution,sodium hypochlorite solution was added by drops trickling into the reaction system.关键词
2,2,6,6-四甲基哌啶类氮氧自由基/纤维素/氧化/缓冲溶液Key words
2/2/6/6-tetramethylpiperidinyl-1-oxyl/cellulose/oxidation/buffer solution分类
化学化工引用本文复制引用
徐媚,戴红旗,孙旋,王晶晶,毛圣陶..缓冲溶液对TEMPO/NaClO/NaBr选择性氧化纤维素的影响[J].纤维素科学与技术,2012,20(1):26-32,38,8.基金项目
国家自然科学基金项目 （）
江苏高校优势学科建设工程资助项目 （）
