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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (7): 598-605.doi: 10.3969/j.issn.1001-1803.2021.07.003

• Development and application • Previous Articles     Next Articles

Synthesis and properties of an amide cationic Gemini surfactant with ester groups

Lu Xiaohao,Xu Hujun,Lin Liangliang,Chang Kuan,Gao Haiyan()   

  1. School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2020-12-09 Revised:2021-06-29 Online:2021-07-22 Published:2021-07-23
  • Contact: Haiyan Gao E-mail:gaohaiyan68@163.com

Abstract:

An amide cationic Gemini surfactant with ester groups (C12- (BAE) -C12) was synthesized in three steps with bromoacetic acid, ethylene glycol, lauric acid and N, N-dimethyl-1, 3-diaminopropane as raw materials. The structure of the product was characterized by FT-IR, 1H NMR and mass spectrometry (MS). The critical micelle concentration (cmc) of C12- (BAE) -C12 was determined by measurement of surface tension, conductivity and fluorescence. The thermodynamic parameters of C12- (BAE) -C12 were obtained from the results of conductivity at 25, 35 and 45 ℃. The emulsification and antistatic properties of C12- (BAE) -C12 were also measured. The results show that the cmc values of C12- (BAE) -C12 at 25 ℃ are 0.331 1, 0.532 8 and 0.316 2 mmol/L, respectively, as obtained by different methods. According to the results of conductivity, the thermodynamic parameters of micellization were calculated with the thermodynamic formulas. It is determined that the micellization process of C12- (BAE) -C12 is entropy-driven, and the increase of temperature will hinder the micellization of the surfactant. Furthermore, the results of application performance show that C12- (BAE) -C12 has better emulsification and antistatic effects than traditional single-chain cationic surfactant dodecyltrimethylammonium bromide (DTAB).

Key words: Gemini surfactant, ester quaternary ammonium salt, micellization, emulsifying property, antistatic property

CLC Number: 

  • TQ423