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日用化学工业 ›› 2016, Vol. 46 ›› Issue (4): 204-207.doi: 10.13218/j.cnki.csdc.2016.04.005

• 开发与应用 • 上一篇    下一篇

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

周杨,潘忠稳,陈赓,孙硕   

  1. 安徽大学 化学化工学院,安徽 合肥 230601
  • 出版日期:2016-04-22 发布日期:2016-04-22
  • 通讯作者: 潘忠稳,教授级高工,硕士生导师,E-mail:ahpzw@163.com。
  • 作者简介:周 杨(1992-),男,安徽合肥人,硕士研究生,电话:15205516953,E-mail:1124460958@qq.com。

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

ZHOU Yang,PAN Zhong-wen,CHEN Geng,SUN Shuo   

  1. School of Chemistry and Chemical Engineering,Anhui University,Hefei,Anhui 230601,China
  • Online:2016-04-22 Published:2016-04-22

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8×10-4 mol/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。

关键词: 甜菜碱表面活性剂, 乙酸酯, 水解, 胶束催化

Abstract: 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 8×10-4 mol/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 and 0.135 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.

Key words: betaine surfactant, acetate, hydrolysis, micellar catalysis

中图分类号: 

  • TQ423.3