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Synthesis and Properties of a Novel Gemini Surfactant with Bis-piperidinium

  • Yicheng Xie , Jiajia Liu , Fan Liu und Hujun Xu
Veröffentlicht/Copyright: 6. September 2017
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Abstract

A novel cationic Gemini surfactant with bis-piperidinium and benzene ring (C10-CGP) was synthesized by aniline, epichlorohydrin and 1-bromodecane in three steps. The structure of C10-CGP was characterized by mass spectroscopy (MS) and nuclear magnetic resonance (1H NMR). The critical micelle concentration (CMC) and the corresponding surface tension (γCMC) of C10-CGP were measured from 298 K to 313 K and the thermodynamic parameters of the micellization were calculated. The results showed that the critical micelle concentration (CMC) and γCMC were 0.976 × 10−3 mol · L−1 and 28.93 mN · m−1 at 298 K, respectively. With the temperature increase, the CMC increased, the maximum surface adsorption capacity (Γmax) decreased, the γCMC decreased and the minimum molecule area (Amin) increased. The free energy of the system during the micelle formation was negative. When the Gemini surfactant was used as an asphalt emulsifier, C10-CGP exhibited good a emulsifying ability. C10-CGP is a slow-set asphalt emulsifier.

Kurzfassung

Ein neues kationisches Gemini-Tensid mit Bis-Piperidinium- und Benzolring (C10-CGP) wurde mittels Anilin, Epichlorhydrin und 1-Bromdecan in drei Reaktionsschritten synthetisiert. Die Struktur von C10-CGP wurde durch Massenspektroskopie (MS) und Kernmagnetresonanz (1H-NMR) charakterisiert. Die kritische Mizellenkonzentration (CMC) und die entsprechende Oberflächenspannung (γCMC) von C10-CGP wurden zwischen 298 K bis 313 K gemessen und die thermodynamischen Parameter der Mizellenbildung berechnet. Die Ergebnisse zeigten, dass die kritische Mizellenbildungskonzentration (CMC) und die Oberflächenspannung bei der CMC (γCMC) bei 298 K 28.93 mN · m−1 bzw. 0,976 × 10 mol L−1 betrugen. Mit Temperaturerhöhung nahm die CMC zu, die maximale Oberflächenadsorptionskapazität (Γmax) sank, die Oberflächenspannung bei der CMC (γCMC) sank und der minimale Platzbedarf pro Molekül (Amin) nahm zu. Die freie Energie des Systems während der Mizellenbildung war negativ. Bei Verwendung des Gemini-Tensids als Asphalt-Emulgator, zeigte C10-CGP eine gute Emulgierfähigkeit. C10-CGP ist ein langsam wirkender Asphalt-Emulgator.


*Correspondence address, Dr. Hujun Xu, Jiangnan University, School of Chemical and Material Engineering, Lihu Avenue, Wuxi 214122, P. R. China, Tel.: +86-13706180672, E-Mail:

Yicheng Xie and Fan Liu are postgraduates at Jiangnan University and are involved in synthesis and analysis of surfactants.

Jiajia Liu is a bachelor at Jiangnan University and are involved in synthesis and analysis of surfactants.

Hujun Xu is an associate professor at Jiangnan University, P.R. China. He received his Ph.D. degree in 2005 from Nanjing University of Science and Technology, P.R. China. He has been involved in surfactants and detergents for over 30 years. He has published over 60 papers in the field of surfactants and detergents.


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Received: 2016-09-13
Accepted: 2017-05-24
Published Online: 2017-09-06
Published in Print: 2017-09-15

© 2017, Carl Hanser Publisher, Munich

Heruntergeladen am 9.10.2025 von https://www.degruyterbrill.com/document/doi/10.3139/113.110521/html
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