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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (3): 135-140.doi: 10.3969/j.issn.1001-1803.2019.03.001

• Basic research •     Next Articles

Synthesis and properties of quaternary ammonium Gemini surfactants with hydroxyl in headgroups

Ya SUN1,Hua PAN2,Fu HAN1(),Ya-wen ZHOU1,Bao-cai XU1   

  1. 1. School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China
    2. China Cleaning Industry Association, Beijing 100044, China
  • Received:2018-08-12 Revised:2019-02-24 Online:2019-03-22 Published:2019-04-04
  • Contact: Fu HAN E-mail:hanf@btbu.edu.cn

Abstract:

A series of quaternary ammonium Gemini surfactants with hydroxyl in headgroups, butylene-1,4-bis[di(2-hydroxyethyl)alkylammonium]dibromide (abbreviated as m-4-m(OH), where m=8, 10, 12, 14) were synthesized by two-step reactions with bromoalkane, diethanolamine and 1,4-dibromobutane. The structure of intermediate and final products were characterized by 1H NMR and mass spectrometry (MS). The surface tension (γcmc) and critical micelle concentration (cmc) of m-4-m(OH) in aqueous solution were determined by the surface tension and conductivity measurements. The emulsifying and foaming properties of m-4-m(OH) in aqueous solution were determined. It is shown that the aggregation of these Gemini surfactants are all spontaneous and the tendency of aggregation is increased with the alkyl chain length. The 14-4-14(OH) shows the lowest cmc (0.48 mmol/L) and γcmc (33.6 mN/m) among these Geminis. The cmc and γcmc of these surfactants in aqueous solution are significantly decreased due to the introduction of hydroxyethyl in the headgroup. The emulsifying property of m-4-m(OH) is better with the longer alkyl chain. The foaming property undergoes a maximum with increasing alkyl chain length.

Key words: Gemini surfactant, polyhydroxy, surface activity, emulsification, foamability

CLC Number: 

  • TQ423