Hydrophile-lipophile balance of alkyl ethoxylated surfactants as a function of intermolecular energies.
The semiempirical MNDO method has been used in order to examine the variation of the molecular properties of hydrocarbons CnH2n + 2 (with 1 < or = n < or = 19) and ethylene oxide chains CH3(CH2CH2O)mCH3 (with 1 < or = m < or = 19) as a function of their molecular length. Least-square fits of those properties have been calculated, along with two mathematical relations between the hydrophile-lipophile balance of alkyl-phenol ethoxylated surfactants and (1) the ratio of molecular lengths between their lipophilic and hydrophilic branches; (2) the intermolecular energies between the molecules of surfactant, water and hexane.
Urbina-Villalba
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INTEVEP S.A., Departamento de Química del Petróleo, Caracas, Venezuela.
Rogel
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Márquez
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ML
Reif
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D000478:Alkylation; D005027:Ethylene Oxide / Q000737:chemistry; D006586:Hexanes / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
D006586:Hexanes; D013501:Surface-Active Agents; D014867:Water; D005027:Ethylene Oxide