Hydration Numbers of Nonelectrolytes from Acoustic Methods

Burakowski, Andrzej; Gliński, Jacek

doi:10.1021/cr2000948

Cited by 83 publications

(45 citation statements)

References 235 publications

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“…Empirical relations invoking icebergs have subsequently been proposed to explain the anomalous increase in u, which begins with the first drop of alcohol. 12,13 To date, however, limited molecular-scale studies have scrutinized this phenomenon.…”

mentioning

confidence: 99%

Communication: Stiffening of dilute alcohol and alkane mixtures with water

Ashbaugh

Barnett

Saltzman

et al. 2016

The Journal of Chemical Physics

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mentioning

confidence: 99%

Communication: Stiffening of dilute alcohol and alkane mixtures with water

Ashbaugh

Barnett

Saltzman

et al. 2016

The Journal of Chemical Physics

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“…22 The most reliable method 23 for determining the hydration numbers seems to be the method of Pasynski cited above. 1,2 If the hydrate is less compressible than the solvent, one observes a decrease in the total compressibility caused by the addition of a solute, because some amount of water solvent becomes less compressible after being incorporated into the hydration shell.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic and Densimetric Titration Applied for Acid-base Reactions

Burakowski

Gliński

2014

ANAL. SCI.

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Classical acoustic acid-base titration was monitored using sound speed and density measurements. Plots of these parameters, as well as of the adiabatic compressibility coefficient calculated from them, exhibit changes with the volume of added titrant. Compressibility changes can be explained and quantitatively predicted theoretically in terms of Pasynski theory of non-compressible hydrates combined with that of the additivity of the hydration numbers with the amount and type of ions and molecules present in solution. It also seems that this development could be applied in chemical engineering for monitoring the course of chemical processes, since the applied experimental methods can be carried out almost independently on the medium under test (harmful, aggressive, etc.).

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“…[ 55 ] About two water molecules are associated with PAA repeating units and seven water molecules with ionized PAA − repeating units, [ 51,56 ] thus z = [(7· α + 2·(1 − α ))]· v water / v PAA where v PAA is 0.098 nm 3 . [ 57 ] Here, volume fractions for PAA − and PAA are φ · α and φ ·(1 − α ), respectively.…”

Section: Discussionmentioning

confidence: 99%

Ultralow Friction with Hydrophilic Polymer Brushes in Water as Segregated from Silicone Matrix

Røn

Javakhishvili

Hvilsted

et al. 2015

Adv Materials Inter

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Lubrication is essential to minimize damage to underlying material and ensure low energy dissipation in biological and man‐made mechanical systems. Surface grafting of hydrophilic polymer brushes is a powerful means to render materials that are slippery in aqueous environments. However, presently available approaches to graft polymer brushes on surfaces, e.g., “grafting‐from” or “grafting‐to” approaches, display several restrictions in terms of practical and long‐term applications. Here a unique method of forming hydrophilic polymer brushes by selective segregation of hydrophilic chains of amphiphilic diblock copolymers, such as poly(dimethylsiloxane)‐b‐poly(ethylene glycol) (PDMS‐b‐PEG) and poly(dimethylsiloxane)‐b‐poly(acrylic acid) (PDMS‐b‐PAA) from the PDMS matrix with an “inverted grafting‐to” approach, and its tribological applications, is presented. In this approach, as the hydrophilic polymer brushes are generated from an internal source of the material, excellent grafting stability and restoring capabilities are revealed even under harsh tribostress. The film can easily be applied to elastomers, metals, and ceramic substrates by spin‐ or drip‐coating. Obtained sliding friction coefficients (μ) are 0.001–0.05 for soft contacts depending on substrate, load, counter surface, pH, and salinity. Between the two types of hydrophilic polymer chains, PAA shows far superior lubricity compared to PEG, which is rationalized by the larger reduction of total free energy of the former upon hydration.

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Hydration Numbers of Nonelectrolytes from Acoustic Methods

Cited by 83 publications

References 235 publications

Communication: Stiffening of dilute alcohol and alkane mixtures with water

Communication: Stiffening of dilute alcohol and alkane mixtures with water

Ultrasonic and Densimetric Titration Applied for Acid-base Reactions

Ultralow Friction with Hydrophilic Polymer Brushes in Water as Segregated from Silicone Matrix

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