Accession Number:

AD0269273

Title:

SURFACE ACTIVITY OF FLUORINATED ORGANIC COMPOUNDS AT ORGANIC-LIQUID/AIR INTERFACES. PART IV. EFFECT OF STRUCTURE AND HOMOLOGY

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Report Date:

1961-12-18

Pagination or Media Count:

18.0

Abstract:

The surface activity of specially designed fluorinated solutes in 7 organic solvents of different compositions and surface tensions was investigated. By varying the structure and composition of the organophobic, the organophilic, and the connecting polar groups, their contribution to solubility, adso ptivity, and orientation and packing of the solute molecules at the orgainc-liquidair interface was investigated. The degree of solubility, as well as the packing of the molecules at the surface, was dependent upon fluorination, length, and number of the organophobic chain, and the structure of the organophilic portion. From the force-vsarea isotherms, the lowest area per molecule attainable in each solvent was calculated. The relation of these lowest areas with the corresponding lowest values of surface tension obtained is discussed in terms of solute structure and orientation at the interface. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE