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Issue 37, 2017
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Multicomponent ionic liquid CMC prediction

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We created a model to predict CMC of ILs based on 704 experimental values published in 43 publications since 2000. Our model was able to predict CMC of variety of ILs in binary or ternary system in a presence of salt or alcohol. The molecular volume of IL (Vm), solvent-accessible surface (Ŝ), solvation enthalpy (ΔsolvG), concentration of salt (Cs) or alcohol (Ca) and their molecular volumes (Vms and Vma, respectively) were chosen as descriptors, and Kernel Support Vector Machine (KSVM) and Evolutionary Algorithm (EA) as regression methodologies to create the models. Data was split into training and validation set (80/20) and subjected to bootstrap aggregation. KSVM provided better fit with average R2 of 0.843, and MSE of 0.608, whereas EA resulted in R2 of 0.794 and MSE of 0.973. From the sensitivity analysis it was shown that Vm and Ŝ have the highest impact on ILs micellization in both binary and ternary systems, however surprisingly in the presence of alcohol the Vm becomes insignificant/irrelevant. Micelle stabilizing or destabilizing influence of the descriptors depends upon the additives. Previous attempts at modelling the CMC of ILs was generally limited to small number of ILs in simplified (binary) systems. We however showed successful prediction of the CMC over a range of different systems (binary and ternary).

Graphical abstract: Multicomponent ionic liquid CMC prediction

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Publication details

The article was received on 25 Jul 2017, accepted on 06 Sep 2017 and first published on 11 Sep 2017

Article type: Paper
DOI: 10.1039/C7CP05019D
Phys. Chem. Chem. Phys., 2017,19, 25309-25318

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    Multicomponent ionic liquid CMC prediction

    I. E. Kłosowska-Chomiczewska, W. Artichowicz, U. Preiss and C. Jungnickel, Phys. Chem. Chem. Phys., 2017, 19, 25309
    DOI: 10.1039/C7CP05019D

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