Surface tensions of binary liquid systems. II. Mixtures of alcohols

Calculation of surface tensions for liquid mixtures using the SWCF‐VR EOS and Butler‐type method

“…In Figure , plotted were three different types of liquid mixtures, nitrogen + methane (non‐associating), toluene + ethanol (self‐associating), and 1‐propanol +1‐decanol (cross‐associating); and in Figure , shown the calculated results for formic acid + water at 293.15, 308.15, and 323.15 K with a temperature‐independent binary interaction parameter. One can see that a good agreement between experimental and theoretical results was observed in Figure . However, for the aqueous formic acid solution, the small deviations between experimental and theoretical results, especially within the concentration range of formic acid from 0.05 to 0.20 in mole fraction where the surface tension rapidly change with formic acid composition, were observed although the proposed method can generally capture the experimental results.…”

“…Experimental (symbols) and theoretical (lines) surface tensions of nitrogen (1) + methane (2) at 90.67 K ( k 12 = k 21 = 0.03712), toluene (1) + ethanol (2) at 303.15 K ( k 12 = k 21 = −0.01620), and 1‐propanol (1) + 1‐decanol (2) at 298.15 K ( k 12 = k 21 = −0.33658) [Color figure can be viewed at wileyonlinelibrary.com]…”

Azeotropic distillation, ethanol washing, and freeze drying on coprecipitated gels for production of high surface area 3Y–TZP and 8YSZ powders: A comparative study

“…Although the surface area is lower in powders dehydrated by EW than by AD, the mechanism responsible for reducing the agglomeration degree is reportedly similar in EW and in distillation with iso-butanol [17,26,41]. The surface tensions of ethanol (21.82 mN m À 1 at 25 1C [47]) and iso-butanol (24.18 mN m À 1 at 25 1C [48]) are very close, suggesting that surface tension is not the main influencer of the degree of agglomeration. The surface areas in the EW and AD techniques likely differ because butoxy groups more effectively prevent the formation of surface Zr−O−Zr bonds than ethoxy groups.…”

Surface tension and density of mixtures of 1,3-dioxolane+alkanols at 298.15 K: analysis under the extended Langmuir model

“…The source and purity of the chemical compounds are shown in Table 1, together with the experimental densities, surface tensions, and values reported by other authors [7][8][9][10][11][12][13][14][15]. The liquids were used without further purification other than being kept over molecular sieves to remove water.…”