Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate

Објеката

Тип

Рад у часопису

Верзија рада

објављена верзија

Језик

енглески

Креатор

Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić

Извор

Chemical Industry and Chemical Engineering Quarterly

Датум издавања

2015

Сажетак

Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (“fish-diagram”) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long, and for compositions near optimum solubilization, i.e., the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long times for equilibration. In addition to visual observation, qualitative measurements of turbidity were performed with a UV-Vis spectrometer for characterizing the behavior of this unusually sluggish system. Isothermal phase diagrams at 20, 25 and 30 °C yielded inconsistent results after the change of temperature and the application of mechanical stress for different treatment of the samples. Ternary mixtures of water, toluene, and lutensol ON 50 seem to form long-living metastable states. The sluggishness and the ambiguous phase behavior of the system are discussed. Inconsistent results are attributed to the slow kinetics of the formation and destruction of liquid crystals and the ability of the system to form mini- -emulsions within an unusual concentration range.

том

21

Број

3

почетак странице

429

крај странице

439

doi

10.2298/CICEQ141012045I

issn

1451-9372

Subject

микроемулзија, толуен, оксоалкохол етоксилат, термодинамичка стабилност, тернарни фазни дијаграми, дијаграми „fish“

microemulsion, toluene, oxoalcohol ethoxylate, thermodynamic stability, ternary phase diagrams, “fish” diagrams

uri

http://dx.doi.org/10.2298/CICEQ141012045I

Шира категорија рада

M20

Ужа категорија рада

М23

Права

Отворени приступ

Лиценца

All rights reserved

Формат

.pdf

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Александар Цвјетић

Марија Илић

Radovi istraživača

Медија

1451-93721400045I.pdf

Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić. "Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate" in Chemical Industry and Chemical Engineering Quarterly (2015). https://doi.org/10.2298/CICEQ141012045I

This item was submitted on 29. новембар 2023. by [anonymous user] using the form “Рад у часопису” on the site “Радови”: http://drug.rgf.bg.ac.rs/s/repo