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Synthesis and Properties of Amide Gemini Surfactants

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Published/Copyright: September 7, 2020
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Abstract

In the present study, three amide Gemini surfactants of different chain lengths were synthesized, namely N,N-bis-dodecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-12), N,N-bis-tetradecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-14) and N,N-bis-hexadecyl-2,6-pyridinium dimethylamide propionate sodium (DLP-16). Their chemical compositions and structures were characterized by FTIR, 1H NMR and mass spectrometry. Moreover, tensiometry, Langmuir monolayer and conductivity measurements were performed to investigate the micellization and chemical surface properties of the surfactants. The results of the characterization proved that the synthesis of DLP-12, DLP-14 and DLP-16 was successful. Among the investigated surfactants DLP-16 had optimum properties such as a higher emulsification ability as well as a lower surface tension. Furthermore, by calculating the critical packing parameter (CPP), the aggregation morphology of the DLP-12, DLP-14 and DLP-16 was also predicated in this study.

Kurzfassung

In der vorliegenden Studie wurden drei Amid-Gemini-Tenside unterschiedlicher Kettenlänge synthetisiert, nämlich Natrium-N,N-Bis-dodecyl-2,6-pyridiniumdimethylamidpropionat (DLP-12), Natrium-N,N-Bis-tetradecyl-2,6-pyridiniumdimethylamidpropionat (DLP-14) und Natrium-N,N-Bis-hexadecyl-2,6-pyridiniumdimethylamidpropionat (DLP-16). Ihre chemischen Zusammensetzungen und Strukturen wurden durch FT-IR, 1H-NMR und Massenspektrometrie charakterisiert. Darüber hinaus wurden Tensiometrie, Langmuir-Monoschicht- und Leitfähigkeitsmessungen durchgeführt, um die Mizellisierung und die chemischen Oberflächeneigenschaften der Tenside zu untersuchen. Die Ergebnisse der Charakterisierung bewiesen, dass die Synthese von DLP-12, DLP-14 und DLP-16 erfolgreich war. Das Tensid DLP-16 wies optimale Eigenschaften wie eine höhere Emulgierfähigkeit sowie eine geringere Oberflächenspannung auf. Darüber hinaus wurde durch die Berechnung des kritischen Packungsparameters (CPP) auch die Aggregationsmorphologie von DLP-12, DLP-14 und DLP-16 in dieser Studie vorhergesagt.


Correspondence address, Prof. Dr. Hujun Xu, School of Chemical & Material Engineering, Jiangnan University, Wuxi, China, E-Mail: ,

Yongchen Cai is a postgraduate student at the School of Chemical & Material Engineering, Jiangnan University, Wuxi, China. His main research field is the synthesis and property of gemini surfactants. E-Mail: . Tel.: 17851313373

Hujun Xu is a professor at the School of Chemical & Material Engineering, Jiangnan University, Wuxi, China. Whose research interests are focused on synthesis and application of surfactants. E-Mail: . Tel.: 13338103707

Xiuying Chen is an associate professor at the School of Chemical & Material Engineering, Jiangnan University, Wuxi, China. Whose research interests are focused on synthesis and application of fine Chemicals. E-mail: . Tel.: 13382888106


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Received: 2019-08-05
Accepted: 2020-03-18
Published Online: 2020-09-07
Published in Print: 2020-09-16

© 2020, Carl Hanser Publisher, Munich

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