NDLI: Lysine-based oligomeric surfactants with cyanuric chloride: synthesis and micellization properties

Content Provider	Springer Nature Link
Author	Liang, Yaqin Li, Hui Liang, Dong Hu, Zhiyong
Copyright Year	2015
Abstract	Two lysine-based oligomeric surfactants 2C12LyNa2 and 3C12LyNa3 were synthesized using cyanuric chloride and N ε-lauroyl-l-lysine. Their physicochemical properties of aqueous solutions were determined by surface tension and conductivity as well as dynamic light scattering (DLS) and transmission electron microscopy (TEM) measurements. From the results of surface tension and conductivity measurements, the critical micelle concentration decreases by one order of magnitude with increasing degree of oligomerization. 3C12LyNa3 and 2C12LyNa2 tend to form premicellar aggregates in solution at a sufficiently low concentration. In addition, their interface behaviors such as adsorption and micellization are reflected by parameters such as the minimum surface area per molecule (A min), adsorption efficiency and effectiveness (pC20), maximum surface excess concentration (Γ max), and standard free energy for micellization and adsorption (ΔG mic ∘ , ΔG ads ° ). The A min value of 2C12LyNa2 and 3C12LyNa3 is two times that of the monomeric surfactant sodium N ε-lauroyl-l-lysine (C12LyNa). With increasing degree of oligomerization, pC 20 increases, which follows the reverse order for ΔG mic ° and ΔG ads ° . TEM results showed that C12LyNa forms slightly entangled rod-like micelles. 2C12LyNa2 and 3C12LyNa2 can self-assemble into regular spherical assemblies; DLS showed that with increasing degree of oligomerization for 2C12LyNa2 and 3C12LyNa3, the diameters of the spherical aggregates decrease and the hydrophobic interaction and hydrogen bonding become stronger.
Starting Page	2209
Ending Page	2216
Page Count	8
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	293
Issue Number	8
e-ISSN	14351536
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-06
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oligomeric surfactant l-Lysine s-Triazine Aggregation behavior Rod-like micelles Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry Food Science Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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