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China Surfactant Detergent & Cosmetics ›› 2015, Vol. 45 ›› Issue (8): 434-438.doi: 10.13218/j.cnki.csdc.2015.08.004

• KAIFA YU YINGYONG • Previous Articles     Next Articles

Synthesis and properties of diallylmethylalkylammonium bromide

TAO Xian-ping1, ZHANG Yue-jun2, XIA Sheng-li1   

  1. 1.College of Chemical and Biological Engineering,Nantong Professional Institute,Nantong,Jiangsu 226007,China;
    2.School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China
  • Received:2015-05-05 Revised:2015-06-28 Online:2015-08-22 Published:2019-04-10

Abstract: Four kinds of diallylmethylalkyl (n=4,6,8,10) quaternary ammonium salt (refers to as C4,C6,C8 and C10) were synthesized by using diallylmethylamine (DAM) and 1-bromo alkane with separate chain length as raw materials.The chemical structure of the products was characterized by IR,1HNMR and elemental analysis.Meanwhile,their surface activity,water solubility and flocculation property were examined.Results showed that the recommended better process conditions are:acetone as the solvent;molar ratio of DAM to 1-bromo alkane,1∶1.1;reaction time,64~72 h at 50~60 ℃.The product yields achieve 86.16%,78.02%,75.46% and 68.10% respectively.With the increase of the alkyl chain length,their critical micelle concentration decreases as 3.2×10-2,2.1×10-2,1.7×10-2 and 9.0×10-3 mol/L respectively;as well as their corresponding surface tension decreases as 40.3,38.5,34.3 and 33.1 mN/m respectively.All of them show good water solubility,and their Krafft points are all less than 0 ℃.Their flocculation capacity to kaolin and diatomite are in the order of C10>C8>C6>C4.

Key words: quaternary ammonium salt, diallylmethylalkylammonium bromide, synthesis, properties

CLC Number: 

  • TQ423.12