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Surface tension of solids in the absence of adsorption.

Ghasemi H, Ward CA - J Phys Chem B (2009)

Bottom Line: A method has been recently proposed for determining the value of the surface tension of a solid in the absence of adsorption, gammaS0, using material properties determined from vapor adsorption experiments.If valid, the value obtained for gammaS0 must be independent of the vapor used.We apply the proposed method to determine the value of gammaS0 for four solids using at least two vapors for each solid and find results that support the proposed method for determining gammaS0.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Thermodynamics and Kinetics Laboratory, 5 King's College Road, Toronto, Canada M5S 3G8.

ABSTRACT
A method has been recently proposed for determining the value of the surface tension of a solid in the absence of adsorption, gammaS0, using material properties determined from vapor adsorption experiments. If valid, the value obtained for gammaS0 must be independent of the vapor used. We apply the proposed method to determine the value of gammaS0 for four solids using at least two vapors for each solid and find results that support the proposed method for determining gammaS0.

No MeSH data available.


Related in: MedlinePlus

The calculated values of γSV are shown for α-alumina exposed to Ar and to N2 at 77 K. The results shown for N2 are based on adsorption measurements made in two independent laboratories.11,12 Note that all three studies indicate the same value of γS0 for α-alumina at 77 K.
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fig4: The calculated values of γSV are shown for α-alumina exposed to Ar and to N2 at 77 K. The results shown for N2 are based on adsorption measurements made in two independent laboratories.11,12 Note that all three studies indicate the same value of γS0 for α-alumina at 77 K.

Mentions: The value of γSV may now be calculated as a function of xV using eq 6 and the values of the isotherm parameters listed in Table 1. If the limit is taken of eq 6 as xV goes to zero, one obtains eq 1. We emphasize that the values of the adsorption parameters were determined strictly from the adsorption measurements. Thus, the calculated value of γS0 for each vapor may be viewed as a prediction. For Ar and N2 adsorbing on α-alumina, the results are shown in Figure 4. This figure includes results obtained from two independent studies of N2 adsorption on α-alumina. In each case, the different vapors indicate the same value of γS0. In Table 1, note that the adsorption of Ar and N2 on titania, magnesia, and borosilicate glass indicate the same value of γS0.


Surface tension of solids in the absence of adsorption.

Ghasemi H, Ward CA - J Phys Chem B (2009)

The calculated values of γSV are shown for α-alumina exposed to Ar and to N2 at 77 K. The results shown for N2 are based on adsorption measurements made in two independent laboratories.11,12 Note that all three studies indicate the same value of γS0 for α-alumina at 77 K.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2746467&req=5

fig4: The calculated values of γSV are shown for α-alumina exposed to Ar and to N2 at 77 K. The results shown for N2 are based on adsorption measurements made in two independent laboratories.11,12 Note that all three studies indicate the same value of γS0 for α-alumina at 77 K.
Mentions: The value of γSV may now be calculated as a function of xV using eq 6 and the values of the isotherm parameters listed in Table 1. If the limit is taken of eq 6 as xV goes to zero, one obtains eq 1. We emphasize that the values of the adsorption parameters were determined strictly from the adsorption measurements. Thus, the calculated value of γS0 for each vapor may be viewed as a prediction. For Ar and N2 adsorbing on α-alumina, the results are shown in Figure 4. This figure includes results obtained from two independent studies of N2 adsorption on α-alumina. In each case, the different vapors indicate the same value of γS0. In Table 1, note that the adsorption of Ar and N2 on titania, magnesia, and borosilicate glass indicate the same value of γS0.

Bottom Line: A method has been recently proposed for determining the value of the surface tension of a solid in the absence of adsorption, gammaS0, using material properties determined from vapor adsorption experiments.If valid, the value obtained for gammaS0 must be independent of the vapor used.We apply the proposed method to determine the value of gammaS0 for four solids using at least two vapors for each solid and find results that support the proposed method for determining gammaS0.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical and Industrial Engineering, Thermodynamics and Kinetics Laboratory, 5 King's College Road, Toronto, Canada M5S 3G8.

ABSTRACT
A method has been recently proposed for determining the value of the surface tension of a solid in the absence of adsorption, gammaS0, using material properties determined from vapor adsorption experiments. If valid, the value obtained for gammaS0 must be independent of the vapor used. We apply the proposed method to determine the value of gammaS0 for four solids using at least two vapors for each solid and find results that support the proposed method for determining gammaS0.

No MeSH data available.


Related in: MedlinePlus