Accessible Requires Authentication Published by De Gruyter April 11, 2013

One-step Preparation of Comb-like Surfactants Containing Poly(ethylene oxide) Methyl Ether and Linear Alkyl Grafts

Einstufiges Herstellungsverfahren für kammartige Tenside mit Polyethylenoxidmethylether- und linearen Alkylseitenketten
W. Zhang, Z. Du, W. Wang, G. Wang and S. Lin

Abstract

The optimum one-step method for preparing comb-like surfactants with poly(styrene-co-maleic anhydride) (SMA) as backbone was investigated to achieve a commercial way for manufacture. The side chain molecule was introduced into reaction system while the radical copolymerization of styrene (St) and maleic anhydride (MA) in anhydrous inhibitor-free tetrahydrofuran (THF) was finished. The precipitation and purification process of SMA in traditional grafting-onto route was passed over. A series comb-like surfactants with various side chain, poly(styrene-co-maleic anhydride)-g-(poly(ethylene glycol) monomethyl ether) (SMA-M), poly(styrene-co-maleic anhydride)-g-(poly(ethylene glycol) monomethyl ether & dodecane) (SMA-M+C12) and poly(styrene-co-maleic anhydride)-g-(dodecane) (SMA-C12), was prepared via this one step method respectively. The molecular weight of the products was measurement via gel permeation chromatography (GPC). The comb-like structures of the surfactants were confirmed by Infrared Spectroscopy (IR) and 1H nuclear magnetic resonance spectroscopy (1H NMR). The equilibrium surface tension was measured to evaluate the surface activity of comb-like surfactants. The surface activity of the product could be improved by using C12 to carry out a hydrophobic modification. The surface activity of comb-like surfactants could be adjusted by using various side chains with different amphiphilic property.

Kurzfassung

Mit dem Ziel, ein kommerzielles Herstellungsverfahren zu erhalten, wurde ein einstufiges Verfahren zur Synthese von kammartigen Tensiden mit einem Styrol-Maleinsäureanhydrid-Copolymer-Rückgrat (SMA) entwickelt und optimiert. Die Seitenketten wurden in das Reaktionssystem eingeführt während die radikalische Copolymerisation von Styren (St) und Maleinsäureanhydrid (MA) in wasser- und inhibitorfreiem Tetrahydrofuran (THF) beendet wurde. Die Ausfällung und Reinigung von SMA des herkömmlichen Pfopfprozesses wurde übergangen. Eine Reihe kammartiger Tenside mit verschiedenen Seitenketten, und zwar Styrol-Maleinsäureanhydrid-Copolymer-g-Polyethylengylkol-Monomethylether (SMA-M), Styrol-Maleinsäureanhydrid-Copolymer-g-Polyethylengylkol-Monomethylether (SMA-M) und SMA-M mit Dodecan (SMA-M+C12) und Styrol-Maleinsäureanhydrid-Copolymer-g-Dodecan (SMA-C12), wurde mittels der einstufigen Methode synthetisiert. Das Molekulargewicht der Produkte wurde mittels Gelpermeationschromatografie (GPC) gemessen. Die kammartigen Strukturen wurden durch Infrarotspektroskopie (IR) und Protonenresonanzspektroskopie (1H-NMR) bestätigt. Die Gleichgewichtsgrenzflächenspannung wurde gemessen, um die Grenzflächenaktivität der kammartigen Tenside zu bewerten. Die Grenzflächenaktivität der Produkte konnte verbessert werden, in dem an ihnen mit C12 eine hydrophobe Modifikation vorgenommen wurde. Die Grenzflächenaktivität konnte angepasst werden, indem verschiedene Seitenketten mit unterschiedlichen amphiphilen Eigenschaften eingesetzt wurden.


Zhiping Du, Department of Chemistry & Chemical Engineering, Shanxi University, 34 Wenyuan Street, Taiyuan, Shanxi Province, 030001, P.R. China, Tel.: 008613453437591, Fax: 00863514040802. E-Mail: ,

Wei Zhang is currently a Ph.D. student in Shanxi University. She received her M.S. degree from China Research Institute of Daily Chemical Industry in 2005. She joined Prof. Du Zhiping's group in 2006. Her current scientific interests are focused on the synthesis and property of comb-like amphiphilic copolymer and understanding their structure-related physical and chemical properties.

Zhiping Du is currently a director of Shanxi Province surfactant key laboratory. She received her Ph.D. degree (2003) from Leeds University. Then she worked as a postdoctoral fellow in Leeds University. Her scientific interest is focused on surfactant and detergent researches.

Wan-Xu Wang is currently the director of China Research Institute of Daily Chemical Industry. He received his M.S. degree from Shanxi University. His research interests are the manufacture of surfactants.

Guoyong Wang received his M.S. degree from Nanchang University of China in 2006. His research interests are synthesis and property of organosilicone surfactants.

Shengsen Lin is currently the Master student of Prof. Du in China Research Institute of Daily Chemical Industry. His major is surfactant preparation technology.


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Received: 2011-01-27
Published Online: 2013-04-11
Published in Print: 2011-09-01

© 2011, Carl Hanser Publisher, Munich