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  • 1
    Electronic Resource
    Electronic Resource
    The Adsorption of Triton X-100 at the Air-Aqueous Solution Interface (1995)
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 4515-4518 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00011a055
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the electrophoretic mobility and zeta potential of montmorillonite in non-aqueous media (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 435-438 
    Details
    ISSN: 1435-1536
    Keywords: Electrophoresis ; montmorillonite ; zeta potential ; double layer thickness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Experimental results on the electrophoretic velocity and mobility of Ca-montmorillonite in 2-propanol are reported. The variation of the electrophoretic velocity with the externally applied electric field and the particle size range, at constant volume fraction and temperature, is considered. Given the difficulties for determining the types and concentrations of ions present in these liquid media, two methods are discussed for the estimation of the double layer thickness and hence the productκα, necessary for the determination of the zeta potential (ζ) of the interface. Although both methods of calculation yield different values ofκα, the results for the zeta potential are very similar in the regions ofκα andζ characteristic of our systems. The application to the experimental data of three theoretical relations between electrophoretic mobility and zeta potential is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419547
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermodynamic excess quantities in the adsorption of sodium alkylsulfonates at the air-solution interface (1983)
    Springer
    Colloid & polymer science 261 (1983), S. 183-187 
    Details
    ISSN: 1435-1536
    Keywords: Sodium alkylsulfonates ; air-solution interface ; thermodynamic excess quantities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Data on the surface tension of sodium alkylsulfonate solutions at different temperatures and surfactant concentrations are presented. By applying the thermodynamic treatment of Guggenheim, changes in the thermodynamic excess quantities associated with the adsorption were evaluated. The entropy, enthalpy and internal energy of interface formation are positive and become more positive as both the surfactant concentration and the temperature increase. The adsorption of alkylsulfonate ions at the air-solution interface is a favorable process from the entropic viewpoint, while it is an unfavorable one from the energetic viewpoint. The increase of the entropy overcomes the disadvantage of the gain of energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410700
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of mixture anionic and non-ionic surfactants on the surface free energy of cassiterite (1994)
    Springer
    Journal of materials science 29 (1994), S. 3177-3184 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The measurements of the contact angle were made for water, glycerol, formamide, diiodomethane and bromoform on a cassiterite surface covered with a mixed film of SDS and TX-100 formed by adsorption from solution of SDS and TX-100 at different molar fraction at a constant concentration equal to 2×10−4 m. Using the contact angles the dispersion and non-dispersion or Lifshitz-van-der-Waals and acid-base components of the surface free energy of cassiterite covered with a mixed film of SDS and TX-100 were evaluated. These components were compared to those for a “bare” cassiterite surface. Also, the electron-acceptor and electron-donor parts of the acid-base components were determined. On the basis of the measurements and calculations synergetic effects were found in the wettability and surface free energy of cassiterite when it was covered with the mixed film.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356660
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Wettability and surface free energy of zirconia ceramics and their constituents (1999)
    Springer
    Journal of materials science 34 (1999), S. 5923-5926 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Measurements of contact angle for water, glycerol, formamide and diiodomethane on surfaces of zirconia ceramic stabilized with 4% magnesia, zirconia ceramic stabilized with 3% yttria, zirconia ceramic stabilized with 5% yttria, tetragonal-Y-zirconia ceramic, cubic-Y-zirconia ceramic, zirconium (IV) oxide, aluminum oxide, magnesium oxide and yttrium oxide were conducted. Using the values of contact angle, the total surface free energy of these solids, and its components resulting from different kinds of intermolecular interactions were calculated. It was found that the Lifshitz-van der Waals component of the surface free energy of zirconia ceramics only slightly depends on the amount and kind of metal oxides present in the ceramics. The acid-base component of all the studied solids is lower than 13 mJ/m2, showing a small dependence on the kind of metal oxide. For all samples studied the electron-donor parameter of the acid-base components of the surface free energy is many times higher that electron-acceptor one. It was stated that the acid-base component probably depends on the density of OH groups on the surface of the solids studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004767914895
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    Paper (German National Licenses)
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