Improvement of Separation of Polystyrene Particles with PAN Membranes in Hollow Fiber Flow Field-Flow Fractionation

doi:10.5012/bkcs.2003.24.9.1333

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…Our experimental findings are in harmony with this line of thought, as different numbers of conformers are observed among the carboxylic acids investigated, with malonic acid having the most of them. [99][100][101] Figure 4(a) reveals details regarding the ionic transport of the investigated DESs. The room-temperature dc conductivity is the FIG.…”

Section: Coupling Of Reorientational and Translational Dynamicsmentioning

confidence: 99%

Translational and reorientational dynamics in carboxylic acid-based deep eutectic solvents

Schulz,

Moch,

Hinz

et al. 2024

The Journal of Chemical Physics

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The glass formation and the dipolar reorientational motions in deep eutectic solvents (DESs) are frequently overlooked, despite their crucial role in defining the room-temperature physiochemical properties. To understand the effects of these dynamics on the ionic conductivity and their relation to the mechanical properties of the DES, we conducted broadband dielectric and rheological spectroscopy over a wide temperature range on three well-established carboxylic acid-based natural DESs. These are the eutectic mixtures of choline chloride with oxalic acid (oxaline), malonic acid (maline), and phenylacetic acid (phenylaceline). In all three DESs, we observe signs of a glass transition in the temperature dependence of their dipolar reorientational and structural dynamics, as well as varying degrees of motional decoupling between the different observed dynamics. Maline and oxaline display a breaking of the Walden rule near the glass-transition temperature, while the relation between the dc conductivity and dipolar relaxation time in both maline and phenylaceline is best described by a power law. The glass-forming properties of the investigated systems not only govern the orientational dipolar motions and rheological properties, which are of interest from a fundamental point of view, but they also affect the dc conductivity, even at room temperature, which is of high technical relevance.

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Section: Coupling Of Reorientational and Translational Dynamicsmentioning

confidence: 99%