Effect of molecular structure of catanionic surfactant mixtures on their interfacial properties
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- 作者：Ce Wanga ; c ; Xu-Long Caob ; Lan-Lei Guob ; Zhi-Cheng Xua ; Lei Zhanga ; Qing-Tao Gonga ; Lu Zhanga ; luyiqiao@hotmail.com" class="auth_mail" title="E-mail the corresponding author ; Sui Zhaoa ; zhaosui@mail.ipc.ac.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Catanionic surfactant mixture ; Interfacial rheology ; Dilational elasticity ; Dilational viscosity ; Relaxation process
- 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
- 出版年：2016
- 出版时间：20 November 2016
- 年：2016
- 卷：509
- 期：Complete
- 页码：601-612
- 全文大小：1356 K
文摘
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Catanionic surfactant mixtures are closely-packed at oil-aqueous interface and the adsorption layer has displayed strong viscoelasticity.
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The ratio of anionic/cationic surfactants on the adsorption layer is independent with the ratio in the bulk.
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The SDS-C12TAB mixture adsorption layers arrange more closely and possesses higher elasticity than SDDS-C12TAB and DAS-C12TAB.
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Long alky chain makes the molecular motion, orientation and rearrangement more difficult and slows down the relaxation processes.