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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 263 (1985), S. 3-24 
    ISSN: 1435-1536
    Keywords: Zetapotential ; electrokinetic potential ; fibers
    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 A survey is given on both theoretical background and methodical details of zeta-potential measurements on fibers. Electro-osmosis and streaming potential/streaming current measurements can be used in order to obtain correct zeta-potentials. Both measuring principles yield the same values for zeta-potential if the errors due to resistance measurements are avoided. This agreement as well as the independence of zeta-potential of applied voltage (in the case of electro-osmosis) and hydrostatic pressure (in the case of streaming potential/streaming current) point out that the Stern-potential at the boundary immobile/diffuse layer can be determined. Electrophoresis and measurement of other electrokinetic phenomena give values related to but not identical with the zeta-potential. Applications of electrokinetic measurements for investigating fiber problems in production, processing and finishing are reviewed. Parameters determining the zeta-potential of fibers are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 264 (1986), S. 193-194 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 40 (1989), S. 723-728 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Untersuchungen des Einflusses von Dampfphaseninhibitoren auf die Oberflächenladung von Eisenoxid-Partikeln durch Zeta-Potential-MessungenDie Adsorbierbarkeit des Dampfphaseninhibitors Dicyclohexylammoniumnitrit (Dichan) und seiner in wäßrigen Medien vorliegenden ionogenen Bestandteile wurde an Partikeln verschiedener Eisenoxide und -oxidhydroxide mit Hilfe von Zeta-Potential-Messungen in 10-3 M KCl-Lösung in Abhängigkeit vom pH-Wert untersucht. Dabei konnte gezeigt werden, daß die Wechselwirkungen von Dichan mit Eisenoxiden zu einer Negativierung der Zeta-Potentiale und einer Verschiebung des Isoelektrischen Punkts der Partikeloberfläche (IEPS) führen. Durch das Dicyclohexylamin in der Grundlösung wird das Zeta-Potential der Eisenoxide selbst bei Einstellung der Sättigungskonzentration kaum beeinflußt. Da auch das Nitrit die oberflächenchemischen Eigenschaften erst bei Konzentrationen, die wesentlich über der für Dichan vorgegebenen liegen, verändert, wird für die gute Adsorbierbarkeit des Dichans an oxidischen Eisenverbindungen ein Synergismus angenommen. Dieser besteht vermutlich in der Begünstigung der spezifischen Adsorption der Nitritionen an der Oxidoberfläche durch die Aminkomponente.
    Notes: Adsorbability of the vapour phase inhibitor dicyclohexylammonium nitrite (Dichan) and its ionic constituents present in aqueous media were investigated by means of zeta-potential measurements in 10-3 M KCl solution in dependence on the pH-value using particles of various iron oxides and oxide hydroxides. It was pointed out, that the interactions between Dichan and iron oxides result in a negativation of the zeta-potential and in a displacement of the isoelectric point of the particles surface (IEPS) due to specific adsorption of anions. By dicyclohexylamine in the primary solution, the zeta-potential of iron oxides is hardly influenced, even when the saturation concentration is established. As nitrite changes the chemical surface properties when concentrations considerably higher than those indicated for Dichan are achieved, a synergism is assumed to be present because of the Dichan's high adsorbability at oxidic iron compounds. This effect probable consist in the promotion of the specific adsorption of nitrite ions at the oxide surface by the amine component.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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