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8711005 
Journal Article 
Adsorption at the graphite/liquid interface of a long-chain n-paraffin (docosane) from dilute solutions of non-polar solvents 
Fache, U; Findenegg, GH; Kern, HE; Liphard, M 
1981 
Tribology Series 
7 
709-718 
English 
The adsorption of docosane (n-C22H46) onto graphitized carbon black from dilute solutions of nonpolar solvents (benzene, cyclohexane, heptane, dodecane, CCl4) has been studied by measuring the surface excess isotherms and enthalpy of adsorption from solution (displacement) isotherms at 298 K (and up to 318 K for CCl4). the influence of the solvent on the stability of an adsorbed monolayer of the long-chain paraffin is expressed by the adsorption affinity Δaμio of the solvent. With one exception Δaμi° is found to be proportional to the areal enthalpy of wetting of the surface by the pure solvents. the relatively weak adsorption affinity of heptane is attributed to a more negative standard entropy of adsorption δasm,i° as compared with solvents composed of globular molecules. 1982, Elsevier Science & Technology. All rights reserved.