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China Surfactant Detergent & Cosmetics ›› 2016, Vol. 46 ›› Issue (7): 392-396.doi: 10.13218/j.cnki.csdc.2016.07.006

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Study on surface activity of N,N'-p-xylylene-bis- (dodecyldimethylammonium chloride)/AEO9 blend systems

LI Gang-sen1,ZHAO Lin-xiu2,WANG Pei-yi1,SU Hao1,ZHAI Jia-bin2,JIANG Dong-fang1   

  1. 1.College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou,Henan 450001,China;
    2.School of Chemical and Environment Engineering,North University of China,Taiyuan,Shanxi 030051,China
  • Online:2016-07-22 Published:2019-04-18

Abstract: Cationic Gemini surfactants N,N'-p-xylylene-bis-(dodecyldimethylammonium chloride) (XBDDMA) were synthesized by 1,4-bis-(chloromethyl)-benzene (XDC) and dimethyldodecylamine.The chemical structure of the purified product was confirmed by FT-IR,1H NMR and 13C NMR.The XBDDMA and AEO9 were blended with different molar ratio,as well as the critical micellar concentration (cmc),equilibrium surface tension (γcmc) and dynamic surface tension of the blend system were studied.The results showed that as n(XBDDMA)∶n(AEO9) is at the range of 1∶9 - 9∶1,following the increase of content of XBDDMA,the cmc of the blend system decreases firstly and then increases,while the area occupied by the surfactant (Amin ) decreases continuously.When n(XBDDMA)∶n(AEO9)=1∶1,the cmc of the blend system is the smallest,which is 2.27×10-6 mol/L,and the γcmc is 33.06 mN/m,which is also the smallest.The addition of XBDDMA reduces the initial diffusion energy,which reduces the dynamic surface activity of AEO9,and there is no synergism effect on the dynamic surface activity between XBDDMA and AEO9.

Key words: quaternary ammonium salt, Gemini surfactant, blend system, synergistic effect, dynamic surface tension

CLC Number: 

  • TQ423