The behaviour of hyaluronan solutions in the presence of Hofmeister ions: A light scattering, viscometry and surface tension study

Musilová, Lenka; Kašpárková, Věra; Mráček, Aleš; Minařík, Antonín; Minařík, Martin

doi:10.1016/j.carbpol.2019.02.032

Cited by 19 publications

(9 citation statements)

References 44 publications

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“…This shows the smaller expansion of the NaHy coil in the presence of the SCN − . Here, the described behaviour of NaHy conforms with findings reported in [20] for NaHy with notably higher molecular mass of 1. The course of the ηred vs c dependences depicted in Figure 3 affords additional interesting information on the studied samples and proves that NaHy behaves as typical polyelectrolyte polymer.…”

Section: Viscositysupporting

confidence: 90%

“…Support for these facts is shown in previous viscosity studies for the same systems [20], that is, NaHy in water and in saline solutions. It was concluded that the absence of salts leads to the increase of the repulsions between the unities of sodium hyaluronate, and consequently to the increase of the hydrodynamic volume of the coil of NaHy and, of course, of its viscosity.…”

Section: Anion (K a Or Chsupporting

confidence: 63%

“…However, the obtained results must be considered as approximate according to the authors [19]. Some of us [20] have reported dynamic light-scattering (DLS), viscosity and surface tension (SFT) measurements to characterize the influence of the following salts: Na 2 SO 4 , (NH 4 ) 2 SO 4 , NaSCN, NH 4 SCN and NaCl, on the behavior of hyaluronan in diluted solutions at a temperature range of 15-45 • C. In the sequence of this work, we intend to extend these studies measuring viscosities for the same aqueous systems but using other NaHy with lower molecular mass (Mw = 124 kDa), and also characterise the influence of these particular salts on the diffusion of NaHy using the same samples of this compound (i.e., Mw = 1.8-2.1 MDa and Mw = 124 kDa). The selection of these salts was based on the ordering of Hofmeister series [21] and its related properties (viscosity or surface energy and entropies of ion solvation) [22], this classification being proposed in accordance with the abilities of these ions to induce the water structuring or breaking ( Figure 2).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Hofmeister Ions on Transport Properties of Aqueous Solutions of Sodium Hyaluronate

Musilová

Mráček

Kašpárková

et al. 2021

IJMS

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Tracer diffusion coefficients obtained from the Taylor dispersion technique at 25.0 °C were measured to study the influence of sodium, ammonium and magnesium salts at 0.01 and 0.1 mol dm−3 on the transport behavior of sodium hyaluronate (NaHy, 0.1%). The selection of these salts was based on their position in Hofmeister series, which describe the specific influence of different ions (cations and anions) on some physicochemical properties of a system that can be interpreted as a salting-in or salting-out effect. In our case, in general, an increase in the ionic strength (i.e., concentrations at 0.01 mol dm−3) led to a significant decrease in the limiting diffusion coefficient of the NaHy 0.1%, indicating, in those circumstances, the presence of salting-in effects. However, the opposite effect (salting-out) was verified with the increase in concentration of some salts, mainly for NH4SCN at 0.1 mol dm−3. In this particular salt, the cation is weakly hydrated and, consequently, its presence does not favor interactions between NaHy and water molecules, promoting, in those circumstances, less resistance to the movement of NaHy and thus to the increase of its diffusion (19%). These data, complemented by viscosity measurements, permit us to have a better understanding about the effect of these salts on the transport behaviour of NaHy.

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Section: Viscositysupporting

confidence: 90%

Section: Anion (K a Or Chsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

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Effect of Hofmeister Ions on Transport Properties of Aqueous Solutions of Sodium Hyaluronate

Musilová

Mráček

Kašpárková

et al. 2021

IJMS

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“…The reason of this behaviour could be seen in the different effect of the ion from the Hofmeister series on the PVA. Na 2 SO 4 salt containing a kosmotropic cation and kosmotropic anion, whereas NaCl salt is a combination of a kosmotropic anion and chaotropic cation [37]. Additionally, differences in particle size were also observed in distribution curve.…”

Section: Dynamic Light Scattering Measurements (Dls)mentioning

confidence: 97%

Effect of sodium salts on diffusion of poly(vinyl alcohol) in aqueous solutions

Filová

Musilová

Mráček

et al. 2020

Journal of Molecular Liquids

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The Taylor dispersion technique has been used for measuring the tracer diffusion coefficients, D 0Tracer , for poly (vinyl alcohol) (PVA) in aqueous systems containing two specific electrolytes (i.e., NaCl and Na 2 SO 4 ) at three different concentrations (0.020, 0.050 and 0.10 mol dm −3 ), and at 25°C. The selection of these salts has been based on the Hofmeister series of cations and anions, which order the ions with respect to the behavior of some macroscopic properties (such as, surface tension) and that can be interpreted as an effect salting-out or salting-in, depending if the target ions are strongly (kosmotropic) or a weakly hydrated (chaotropic). In this work, we have been used the combination of two kosmotropic ions (Na 2 SO 4 ) and another one with a kosmotropic cation and a chaotropic anion (NaCl). These data, complemented by NMR measurements, permit us to have a better understanding about the effect of these sodium salts on transport and thermodynamic behaviour of PVA.

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“…Due to a rather stiff backbone chain caused by the disaccharide structure, internal hydrogen bonds, and interactions with solvents, the ternary structure is an expanded random coil [23,24]. It was experimentally proven that the presence of ions can influence coil diameter [25]. The coil structure is capable of absorbing approximately 1000 times its weight of water [26].…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of Hyaluronan Using Polymer Coelectrospinning and Intermediate Solvent

et al. 2019

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In the current study, we present methods of sodium hyaluronate, also denoted as hyaluronan (HA), nanofiber fabrication using a direct-current (DC) electric field. HA was spun in combination with poly(vinyl alcohol) (PVA) and polyethylene oxide (PEO) and as a pure polymer. Nonaggressive solvents were used due to the possible use of the fibers in life sciences. The influences of polymer concentration, average molecular weight (Mnormalw), viscosity, and solution surface tension were analyzed. HA and PVA were fluorescent-labeled in order to examine the electrospun structures using fluorescence confocal microscopy. In this study, two intermediate solvent mixtures that facilitate HA electrospinning were found. In the case of polymer co-electrospinning, the effect of the surfactant content on the HA/PVA electrospinning process, and the effect of HA Mnormalw on HA/PEO nanofiber morphology, were examined, respectively.

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The behaviour of hyaluronan solutions in the presence of Hofmeister ions: A light scattering, viscometry and surface tension study

Cited by 19 publications

References 44 publications

Effect of Hofmeister Ions on Transport Properties of Aqueous Solutions of Sodium Hyaluronate

Effect of Hofmeister Ions on Transport Properties of Aqueous Solutions of Sodium Hyaluronate

Effect of sodium salts on diffusion of poly(vinyl alcohol) in aqueous solutions

Electrospinning of Hyaluronan Using Polymer Coelectrospinning and Intermediate Solvent

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