Monolayer properties of fatty acids
| Autor: | F.D Gunstone, George Zografi, A.K Rakshit, I.M Jalal |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
chemistry.chemical_classification
Degree of unsaturation Double bond Chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dilution Biomaterials High surface Crystallography Colloid and Surface Chemistry Monolayer Organic chemistry Molecule Free energies Cis–trans isomerism |
| Zdroj: | Journal of Colloid and Interface Science. 80:466-473 |
| ISSN: | 0021-9797 |
| Popis: | The properties of monolayers spread at the air-water interface were measured for saturated, unsaturated, and hydroxy fatty acids, differing in the type and degree of unsaturation, geometric isomerism, and position of unsaturated and hydroxy groups. Surface vapor pressures, reflecting the equilibrium between “gaseous” and “liquid” monolayer states were determined, as were the free energies of compression, ΔF c , from essentially infinite dilution (100,000 A 2 /molecule) to the area per molecule, A e at the equilibrium spreading pressure, π e . Surface vapor pressures and free energies of compression for saturated and unsaturated fatty acids with a double bond, or bonds, change in a manner expected because of chain-chain interactions. Hydroxy and acetylenic acids produce relatively high surface vapor pressures, despite their tendency for strong chain-chain interaction. It is concluded that chain-water interactions are very significant for the acetylenic and hydroxy acids and less so for the saturated and ethylenic acids. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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