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日用化学工业 ›› 2020, Vol. 50 ›› Issue (3): 143-148.doi: 10.3969/j.issn.1001-1803.2020.03.001

• 基础研究 •    下一篇

一种酰胺型Gemini表面活性剂的合成及性能

蔡永晨1,郑华生1,2,许虎君1()   

  1. 1. 江南大学 化学与材料工程学院,江苏 无锡 214122
    2. 广州潮徽生物科技有限公司,广东 广州 510730
  • 收稿日期:2019-08-04 修回日期:2020-03-06 出版日期:2020-03-22 发布日期:2020-04-02
  • 通讯作者: 许虎君
  • 作者简介:蔡永晨(1994-),男,安徽滁州人,硕士研究生,电话:17851313373,E-mail: 1515853019@qq.com

Synthesis and properties of an amide Gemini surfactant

Yong-chen CAI1,Hua-sheng ZHENG1,2,Hu-jun XU1()   

  1. 1. School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China;
    2. Guangzhou Chaohui Biological Technology Co., Ltd., Guangzhou, Guangdong 510730, China
  • Received:2019-08-04 Revised:2020-03-06 Online:2020-03-22 Published:2020-04-02
  • Contact: Hu-jun XU

摘要:

以十二胺、丙烯酸甲酯、2,6-吡啶二甲酸为主要原料,经过加成、酰胺化、皂化等反应合成了一种酰胺型Gemini表面活性剂N,N’-双十二烷基-2,6-吡啶二酰胺丙酸钠(DLP-12)。经单因素变量考察得出该反应的最佳反应条件为:n(N-十二烷基-β-氨基丙酸甲酯)∶n(2,6-吡啶二甲酰氯)=2.4∶1,40 ℃下回流反应8 h。在此条件下DLP-12的产率为68.14%。性能测定的结果表明,在25,35和45 ℃时,此种新型Gemini表面活性剂的临界胶束浓度分别为9.1×10 -5,9.5×10 -5和9.7×10 -5mol/L,与之对应的表面张力分别为33.7,32.4和31.1 mN/m,最大表面过剩(Γmax)随着温度的升高而减小,临界堆积参数(CPP)的值表明表面活性剂自组装形态实现由层状结构向棒状结构过渡。25 ℃时,以液体石蜡和正辛烷作为油相所测得的乳化性能分别为277和252 s,罗氏泡沫高度为141 mm。

关键词: N, N’-双十二烷基-2;, 6-吡啶二酰胺丙酸钠, 十二胺, 加成, 酰胺化, 2, 6-吡啶二甲酸, Gemini表面活性剂

Abstract:

An amide Gemini surfactant N,N’-bis-dodecyl-2,6-pyridinium dimethylamide propionate sodium(DLP-12) was synthesized from dodecylamine, methyl acrylate, and 2, 6-pyridine-dicarboxylic acid by addition, amidation, and saponification reactions. By single factor experiments, the optimum reaction conditions for this reaction were: n(N-dodecyl-β-alanine-methyl ester)∶n(2, 6-pyridine-dicarboxylic acid)=2.4∶1, reflux reaction at 40 ℃ for 8 hours. Under these conditions, the yield of the final product was 68.14%. The results showed that the critical micelle concentrations of DLP-12 were 9.1×10 -5, 9.5×10 -5and 9.7×10 -5mol/L at 25, 35 and 45 ℃, respectively, and the corresponding surface tension were 33.7, 32.4 and 31.1 mN/m, respectively. The maximum surface excess concentration (Γmax) decreased with the increase of temperature. The value of the critical packing parameter (CPP) indicated the self-assembly morphology of surfactants in aqueous solution transformed from lamellar structure to rod-like structure. At 25 ℃, the emulsification properties measured with liquid paraffin and n-octane as the oil phase were 277 and 252 s, respectively, and the Roche foam height was 141 mm.

Key words: N, N’-bis-dodecyl-2;, 6-pyridinium dimethylamide propionate sodium, dodecylamine, addition, amidation, 2, 6-pyridine-dicarboxylic acid, Gemini surfactant

中图分类号: 

  • TQ423