摘要
针对活性染料在纤维上染色的动力学性能,研究不同条件下一氯均三嗪型活性染料活性嫩黄K-6G（C.I. Reactive Yellow 2）在甲醇碱性水溶液中的醇解和水解反应动力学,并确定了pH值为10时,不同温度下该染料的醇解与水解反应速率常数。研究表明：在80℃,pH值为9~12之间,醇解效率随时间延长逐渐降低,且pH值越高,醇解效率减少得越快,pH值的升高不利于醇解反应进行,即染料的醇解反应优先性下降;在50~70℃,甲醇化反应占相对优势,其速率为水解速率的2~3倍;80~95℃,甲醇化反应速率常数和水解速率常数基本相等。同时实验中还发现染料的醇解和水解反应都是准一级反应。
The aim of this study was to gain some insight into the kinetics of reactive dye when uptaking on the fiber. The methanolysis and hydrolysis of monochlorotriazine C.I. Reactive Yellow 2 in basic methanol ＆ water solution under different conditions were studied, and the rate constants of these reactions, when pH = 10, were also determined. It was found that when the temperature at 80 ℃ and pH = 9 - 12, the methanolysis efficiency decreased as the time increased, and higher the pH value, faster decreased the methanolysis. Increasing pH value was disadvantageous to aleoholysis, i.e., the superiority of alcoholysis reaction of dye lowered and, when pH = 10, the methanolysis reaction rate contants were 2 - 3 times of that of hydrolysis reaction under 50 - 70 ~C, but were almost equal to that of hydrolysis reaction when the temperature was 80 - 95 ℃. It was also found that both the methanolysis and hydrolysis reactions were pseudo-first-order reactions.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2009年第7期83-87,共5页
Journal of Textile Research
基金
国家自然科学基金资助项目(20075023)
浙江省自然科学基金重点资助项目(ZC0207)
长江学者和创新团队发展计划资助项目(IRT0654)
作者简介
李萍（1984-），女，硕士生。研究方向为染整理论。邵建中，通讯作者，E-mail：jshao@zstu．edu．cn。
