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Effect of Aromatic Ring in the Alkyl Chain on Surface Properties of Aryl Alkyl Sulfonate Surfactants

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Published/Copyright: March 1, 2013
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Abstract

Surface properties of a series of aryl alkyl sulfonate surfactants were investigated. A strong structure-activity relationship was observed, depending on the variation of aromatic ring size in the hydrophobic chain. The results show that the size of aromatic ring, introduced to the carbon chain, affects their surface and thermodynamic properties. The values of critical micelle concentration (cmc), surface excess concentration (Γmax), effectiveness (Πcmc), to reduce surface tension of water, are decreased with increasing the aromatic ring size from phenyl to methylnaphthyl. While, the values of surface tension (γcmc) at cmc, Gibbs energy of micellization (ΔGmic°), and minimum area per molecule (Amin) are increased. Hence, the dominant factor of influencing on the area per molecule of aryl alkyl sulfonate surfactants would be the size of aryl alkyl chains.

Kurzfassung

Die Oberflächeneigenschaften einer Serie von Arylalkylsulfonat-Tensiden wurden untersucht. Es wurde eine starke Strukturaktivitätsbeziehung beobachtet, die abhängig ist von der Variation der aromatischen Ringgröße in der hydrophoben Kette. Die Ergebnisse zeigen, dass die Größe des aromatischen Ringes, der in der Kohlenstoffkette eingeführt ist, sich auf die Oberflächen- und thermodynamischen Eigenschaften auswirkt. Die Werte der kritischen Mizellbildungskonzentration (cmc), Oberflächenüberschusskonzentration (Γmax) und Effektivität (Πcmc) zur Verringerung der Oberflächenspannung von Wasser nehmen ab, mit Zunahme der Aromatenringgröße von Phenyl zu Methylnaphtyl, während die Werte der Oberflächenspannung (γcmc) bei der cmc, Gibbs-Energie der Mizellenbildung (ΔGmic°) und der Minimumsfläche pro Molekül (Amin) zunehmen. Demzufolge wäre die Größe der Arylalkylkette der dominante Einflussfaktor auf die Fläche pro Molekül der Arylalkylsulfonat-Tenside.


1 Dr. Xu Zhigang, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, Dalian, 116012, P.R. China, Tel.: +86-411-88993901, Fax: +86-411-83683229. E-mail:

Dr. Xu Zhigang was born in 1977. He is a PhD student at Dalian University of Technology. His main field of research is aryl alkyl sulfonate surfactants and synthesis and physical chemistry of surfactants.

Ms. Bi Chenguang was born in 1980. She is a master student at Dalian University of Technology. His main fields of research are catalysis and synthesis of surfactants.

Ms. Tian Yuehong was born in 1981. She is a master student at Dalian University of Technology. Her fields are the synthesis and emulsification of surfactants.

Assoc. Prof. Qiao Weihong was born in 1968. She obtained an MSc from Dalian University of Technology in 1994 and a PhD from the same university in 2000. Since 1994, she has been teaching and working at Dalian University of Technology. Her main field of research is the synthesis and Physical chemistry of surfactants.

Prof. Li Zongshi was born in 1936. He obtained a BD form Dalian University of Technology in 1960. Since then he has been working in the department of fine chemicals at Dalian University of Technology. His focus is on the synthesis of surfactants and their applications.

Prof. Cheng Lubo was born in 1933. He obtained a BD from Dalian University of Technology in 1955. Since then he has been working in the department of fine chemicals at Dalian University of Technology. His focus is on the synthesis of surfactants and dyes.


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Received: 2006-01-11
Revised: 2006-03-10
Published Online: 2013-03-01
Published in Print: 2006-06-01

© 2006, Carl Hanser Publisher, Munich

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