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China Surfactant Detergent & Cosmetics ›› 2019, Vol. 49 ›› Issue (5): 293-297.doi: 10.3969/j.issn.1001-1803.2019.05.003

• Development and application • Previous Articles     Next Articles

Synthesis and properties of a series of Gemini surfactants with p-phenylenediamine as a spacer

WANG Chen,XU Hu-jun()   

  1. School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2018-08-14 Revised:2019-03-23 Online:2019-05-22 Published:2019-05-24
  • Contact: Hu-jun XU E-mail:xu6209@163.com

Abstract:

A series of novel Gemini surfactants C12, C16, and C18 with the hydrophobic groups of different lengths were synthesized with epichlorohydrin, N, N-dimethylalkyl amine and p-phenylenediamine as materials in two steps. The products were characterized by FT-IR and 1H NMR. The critical micelle concentration(cmc)and the corresponding surface tension(γcmc)of the phenylenediamine surfactants in aqueous solution were measured at 25 ℃ by surface tensiometer. The Krafft points and the emulsifying, foaming and antimicrobial properties of the aqueous solutions were also determined. The results show that the cmc of C12, C16 and C18 at 25 ℃ are 3.29×10 -3, 2.53×10 -4 and 3.14×10 -4 mol/L, respectively, and the γcmc are 28.24, 31.95 and 35.06 mN/m, respectively. The Krafft points of C12 and C16 are both below 0 ℃, and the Krafft point of C18 is 10 ℃. The foaming properties of C12 are better than those of C16 and C18. The emulsifying properties of C18 are better than those of C12 and C16. C12, C16 and C18 have shown excellent antimicrobial activities.

Key words: Gemini surfactant, surface activity, foaming property, emulsifying property, antimicrobial property

CLC Number: 

  • TQ423