甜菜碱表面活性剂的合成及其胶束催化乙酸酯水解的研究  

Synthesis of betaine surfactant and its micellar catalysis action on alkaline hydrolysis of acetic esters

作　　者：周杨[1] 潘忠稳[1] 陈赓[1] 孙硕[1] 

机构地区：[1]安徽大学化学化工学院,安徽合肥230601

出　　处：《日用化学工业》2016年第4期204-207,211,共5页China Surfactant Detergent & Cosmetics

摘　　要：实验合成了2种甜菜碱表面活性剂C-12和C-16,并在25℃的条件下,采用电导率法研究了乙酸乙酯和乙酸戊酯在C-12和C-16胶束溶液中的碱性水解反应。无表面活性剂时,乙酸乙酯水解速率常数k为0.111 L/(mol·s),乙酸戊酯的k为0.082 L/(mol·s)。当表面活性剂浓度为8×10-4mol/L时,C-12催化下乙酸乙酯的k为0.183 L/(mol·s),乙酸戊酯的k为0.112 L/(mol·s);而C-16催化下乙酸乙酯的k为0.226 L/(mol·s),乙酸戊酯的k为0.135 L/(mol·s)。结果表明,C-12和C-16对乙酸酯的水解均有催化作用,相同条件下,乙酸乙酯水解速度快于乙酸戊酯。Two kinds of betaine surfactant（ C- 12 and C- 16） were synthesized in laboratory. Alkaline hydrolysis of ethyl acetate and amyl acetate,under 25 ℃ in micellar solution of C- 12 and C- 16 separately was studied in accordance with electric conductivity method. In case without use of surfactant,the hydrolysis rate constant（ k） of ethyl acetate and amyl acetate is 0. 111 and 0. 082 L /（ mol · s） respectively. In case surfactant is used and the concentration of surfactant is 8 × 10- 4mol / L,the k of ethyl acetate and amyl acetate to C- 12 is 0. 183 and 0. 112 L /（ mol · s） respectively,and the corresponding to C- 16 is 0. 226 and0. 135 L /（ mol·s） respectively. The results indicated that C- 12 and C- 16 can catalyze the hydrolysis of acetates. Under same conditions,the rate of hydrolysis for ethyl acetate is faster than amyl acetate.

关 键 词：甜菜碱表面活性剂 乙酸酯 水解 胶束催化 

分 类 号：TQ423.3[化学工程]