Current Awareness

Sands, Gillian; Weston-Smith, Sam

doi:10.1017/s1472669600002243

Cited by 1 publication

(1 citation statement)

References 43 publications

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“…The N agg value of DMMB is larger than traditional cationic surfactant (C 10 TAB, N agg = 39, 20 C) (Lianos & Zana, 1981). This difference may be ascribed to the hydrophile-lipophile balance and electrostatic interaction (HLBt, 2011;Sands & Weston-Smith, 2003). The hydrogen bond interaction between the hydroxyl group in DMMB and water may play an important role in forming micelles, which makes DMMB more hydrophilic.…”

Section: Steady-state Fluorescence Measurementsmentioning

confidence: 95%

Experimental study and molecular simulation on aggregation behavior of surface‐active ionic liquids containing saturated nitrogen heterocycles in aqueous solution

Gao

Guo

Liu

et al. 2021

J Surfact & Detergents

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The aggregation behavior of N-decyl-N-methylmorpholinium bromide (DMMB) in aqueous solutions was systematically investigated by experimental measurements and molecular simulation, including surface tension, electrical conductivity, fluorescence measurement, 1 H NMR and dissipative particle dynamic (DPD) simulation. The critical micelle concentration (cmc) of DMMB which was obtained by different techniques showed a pretty good agreement. From the surface tension measurements, a series of surface adsorption properties such as surface tension at the cmc (γ cmc ), effectiveness of surface tension reduction ( Q cmc ), maximum surface excess concentration (Γ max ), minimum surface area per molecule (A min ), were determined. The cmc values and a variety of thermodynamic parameters (ΔG 0 m , ΔH 0 m and ΔS 0 m ) of micellization in the temperature range of 25-45 C were obtained via electrical conductivity experiments. In the investigated temperature range, the thermodynamic parameters reveal that micelle formation is entropy-driven. Furthermore, micelle aggregation number (N agg ) of DMMB was calculated through the fluorescence measurement. Analysis of the 1 H NMR spectrum indicates the micelle formation mechanism. The DPD simulation reflects the process of micro-phase separation. From the simulation results, at concentrations higher than cmc, spherical micelles can be formed. The investigation of DMMB micelles may help us gain a better understanding about surfactant micellization process and expand the range of potential application in materials science.

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Section: Steady-state Fluorescence Measurementsmentioning

confidence: 95%