Thermodynamic Properties of Water + Ethylene Glycol at 283.15, 293.15, 303.15, and 313.15 K

Tsierkezos, Nikos G.; Molinou, Ioanna E.

doi:10.1021/je9800914

Cited by 262 publications

(177 citation statements)

References 7 publications

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“…In order to obtain the interfacial tension of water/n-alkane interface, we first calculated the surface tensions (  ) of water/ vapor and n-alkane/vapor surfaces which consist of the same number of water or n-alkane molecules as used in each phase of the water/n-alkane interface. The calculated surface tension of water/vapor at 300 K was 70.57 ± 0.51 mN/m, which agrees very well with the experimental value 71.72 mN/m [28,29]. The calculated and experimental surface tensions for n-alkane/vapor are shown in Table 2.…”

Section: Interfacial Tensionsupporting

confidence: 80%

Molecular dynamics study of the water/n-alkane interface

et al. 2010

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Molecular dynamics simulations on the interface between liquid water and liquid n-alkane (including octane, nonane, decane, undecane and dodecane) have been performed with the purpose to study the interfacial properties: (I) density profile; (II) molecular orientation; (III) interfacial tension and the temperature effect on the interfacial tension. Simulation results show that at the interface the structures of both water and n-alkane are different from those in the bulk. Water has an orientational preference due to the number of hydrogen bonds per molecule maximized. N-alkane has a more lateral orientation with respect to the interface in order to be in close contact with water. The calculated individual phase bulk density and interfacial tension of water/n-alkane systems are in good agreement with the corresponding experimental ones. molecular dynamics, water/n-alkane interface, interfacial tension

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Section: Interfacial Tensionsupporting

confidence: 80%

Molecular dynamics study of the water/n-alkane interface

et al. 2010

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“…2. The obtained results are in good accordance to values posted in literature [23]. Surface tension decreases with increasing ethylene glycol content.…”

Section: Solvent Systemsupporting

confidence: 91%

“…The investigated water/ethylene glycol mixtures show Newtonian behaviour as expected from literature values [23]. Viscosity increases with increasing concentration of ethylene glycol.…”

Section: Solvent Systemsupporting

confidence: 85%

Highly loaded alumina inks for use in a piezoelectric print head

Polsakiewicz¹,

Kollenberg

2011

Materialwissenschaft Werkst

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Ink jet printing techniques are used for an increasing number of materials and applications. Properties of the used inks have great influence on process stability and accuracy as well as the resulting part properties. Inks containing ceramic particles have been applied in various studies and applications. The criteria identifying suitable inks vary depending on the applied printing technology. In this study, inks for application in a piezoelectric print head were investigated. Alumina inks with solid loadings up to 21 vol.-% were prepared and characterized. The Influence of different solid loadings, dispersant concentrations and binding agents was examined. The prepared inks show sufficient stability and fit literature recommendations for successful drop ejection. Considering rheological aspects, two inks with light shear-thinning behaviour and viscosities of 18 mPas and 23 mPas at high shear rates were recommended for upcoming printing tests. The Re/We 1/2 ratio can be used for predetermination of print ability but the influence of the surface tension is not sufficiently taken into account using the presented calculations. So further printing experiments are essential for clarification of the calculations and obtained print ability values. Keywords: Suspension / particle processing / materials processing / rheology / alumina /

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“…Figure 6a shows a gradual shift of 10K PEO isotherms to lower surface pressures, as the fraction of ethylene glycol (EG) in the subphase is increased (from 0 to 1, 4, 8, and 16 wt %). The reduction in the measured surface pressure at desorption (Π des,0 − Π des ) varies linearly with the reduction in the subphase surface tension (γ 0 − γ) caused by the added ethylene glycol 37 ( Figure 6c). The addition of ethylene glycol may also change Γ des for a given PEO M W ; however, variations appear too small to be measured accurately (Figure 6b).…”

Section: ■ Results and Discussionmentioning

confidence: 96%

Adsorption Energies of Poly(ethylene oxide)-Based Surfactants and Nanoparticles on an Air–Water Surface

et al. 2013

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The self-assembly of polymer-based surfactants and nanoparticles on fluid–fluid interfaces is central to many applications, including dispersion stabilization, creation of novel 2D materials, and surface patterning. Very often these processes involve compressing interfacial monolayers of particles or polymers to obtain a desired material microstructure. At high surface pressures, however, even highly interfacially active objects can desorb from the interface. Methods of directly measuring the energy which keeps the polymer or particles bound to the interface (adsorption/desorption energies) are therefore of high interest for these processes. Moreover, though a geometric description linking adsorption energy and wetting properties through the definition of a contact angle can be established for rigid nano- or microparticles, such a description breaks down for deformable or aggregating objects. Here, we demonstrate a technique to quantify desorption energies directly, by comparing surface pressure–density compression measurements using a Wilhelmy plate and a custom-microfabricated deflection tensiometer. We focus on poly(ethylene oxide)-based polymers and nanoparticles. For PEO-based homo- and copolymers, the adsorption energy of PEO chains scales linearly with molecular weight and can be tuned by changing the subphase composition. Moreover, the desorption surface pressure of PEO-stabilized nanoparticles corresponds to the saturation surface pressure for spontaneously adsorbed monolayers, yielding trapping energies of ∼103 k B T.

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Thermodynamic Properties of Water + Ethylene Glycol at 283.15, 293.15, 303.15, and 313.15 K

Cited by 262 publications

References 7 publications

Molecular dynamics study of the water/n-alkane interface

Molecular dynamics study of the water/n-alkane interface

Highly loaded alumina inks for use in a piezoelectric print head

Adsorption Energies of Poly(ethylene oxide)-Based Surfactants and Nanoparticles on an Air–Water Surface

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