Effects of adsorption on detergency phenomena: I
Identifieur interne : 002692 ( Main/Exploration ); précédent : 002691; suivant : 002693Effects of adsorption on detergency phenomena: I
Auteurs : M. J. Schwuger [Allemagne]Source :
- Journal of the American Oil Chemists Society [ 0003-021X ] ; 1982-06-01.
English descriptors
- Teeft :
- Adsorbent, Adsorption, Adsorption kinetics, Anionic surfactants, Apparent diffusion coefficient, Carbon atoms, Chain length, Cloud point, Coefficient, Complexing agents, Concentration dependence, Detergent ingredients, Different interfaces, Diffusion coefficient, Diffusion coefficient decreases, Effect changes, Equilibrium adsorption, Equilibrium adsorption increases, Fette seifen anstrichm, Free energy, High temperatures, Higher values, Hydrophilic group, Hydrophobic, Hydrophobic group, Hydrophobic groups, Hydrophobic part, Hydrophobic parts, Individual pigments, Interfacial properties, Ionic surfactants, Iron oxide, June, Kaolin, Kinetics, Main chain, Nonionic, Nonionic surfactants, Positive temperature effect, Primary step, Schwuger, Sediment volume, Soil removal, Surfactant, Surfactant adsorption, Surfactant concentration, Textile fiber, Textile fibers, Wash bath.
Abstract
Abstract: Knowledge of the adsorption of surface-active substances onto different interfaces is of basic importance for its technical application in washing and cleaning processes. Important parameters are adsorption kinetics and adsorption equilibria. The criteria of adsorption kinetics and adsorption equilibrium change in opposite directions with increasing length of the hydrophobic group. Equilibrium adsorption increases exponentially, whereas the diffusion coefficient decreases linearly with increasing number of CH2 groups in then-alkyl part of nonbranched surfactants. Branching of the hydrophobic group has the same effect as shortening the chain length. The wetting effect changes in the same direction as the diffusion coefficient, whereas the washing effect changes similarly to equilibrium adsorption. The generally positive temperature effect on soil removal may be reversed in the opposite direction for nonionic surfactants at temperatures above the cloud point. Separation of phases brings about a decrease of adsorption and washing performance.
Url:
DOI: 10.1007/BF02546350
Affiliations:
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J." last="Schwuger">M. J. Schwuger</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Laboratories of Henkel KGaA, Düsseldorf</wicri:regionArea><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Düsseldorf</region><settlement type="city">Düsseldorf</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of the American Oil Chemists Society</title><title level="j" type="abbrev">J Am Oil Chem Soc</title><idno type="ISSN">0003-021X</idno><idno type="eISSN">1558-9331</idno><imprint><publisher>Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="1982-06-01">1982-06-01</date><biblScope unit="volume">59</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="258">258</biblScope><biblScope unit="page" to="264">264</biblScope></imprint><idno type="ISSN">0003-021X</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0003-021X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Adsorbent</term><term>Adsorption</term><term>Adsorption kinetics</term><term>Anionic surfactants</term><term>Apparent diffusion coefficient</term><term>Carbon atoms</term><term>Chain length</term><term>Cloud point</term><term>Coefficient</term><term>Complexing agents</term><term>Concentration dependence</term><term>Detergent ingredients</term><term>Different interfaces</term><term>Diffusion coefficient</term><term>Diffusion coefficient decreases</term><term>Effect changes</term><term>Equilibrium adsorption</term><term>Equilibrium adsorption increases</term><term>Fette seifen anstrichm</term><term>Free energy</term><term>High temperatures</term><term>Higher values</term><term>Hydrophilic group</term><term>Hydrophobic</term><term>Hydrophobic group</term><term>Hydrophobic groups</term><term>Hydrophobic part</term><term>Hydrophobic parts</term><term>Individual pigments</term><term>Interfacial properties</term><term>Ionic surfactants</term><term>Iron oxide</term><term>June</term><term>Kaolin</term><term>Kinetics</term><term>Main chain</term><term>Nonionic</term><term>Nonionic surfactants</term><term>Positive temperature effect</term><term>Primary step</term><term>Schwuger</term><term>Sediment volume</term><term>Soil removal</term><term>Surfactant</term><term>Surfactant adsorption</term><term>Surfactant concentration</term><term>Textile fiber</term><term>Textile fibers</term><term>Wash bath</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Knowledge of the adsorption of surface-active substances onto different interfaces is of basic importance for its technical application in washing and cleaning processes. Important parameters are adsorption kinetics and adsorption equilibria. The criteria of adsorption kinetics and adsorption equilibrium change in opposite directions with increasing length of the hydrophobic group. Equilibrium adsorption increases exponentially, whereas the diffusion coefficient decreases linearly with increasing number of CH2 groups in then-alkyl part of nonbranched surfactants. Branching of the hydrophobic group has the same effect as shortening the chain length. The wetting effect changes in the same direction as the diffusion coefficient, whereas the washing effect changes similarly to equilibrium adsorption. The generally positive temperature effect on soil removal may be reversed in the opposite direction for nonionic surfactants at temperatures above the cloud point. Separation of phases brings about a decrease of adsorption and washing performance.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>District de Düsseldorf</li><li>Rhénanie-du-Nord-Westphalie</li></region><settlement><li>Düsseldorf</li></settlement></list><tree><country name="Allemagne"><region name="Rhénanie-du-Nord-Westphalie"><name sortKey="Schwuger, M J" sort="Schwuger, M J" uniqKey="Schwuger M" first="M. J." last="Schwuger">M. J. Schwuger</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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