Über osmotische Versuche an Kautschuk‐Lösungen

Kroepelin, H.; Brumshagen, W.

doi:10.1002/cber.19280611037

Cited by 19 publications

(1 citation statement)

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“…A beginning in this direction has been made by Bechhold41 and by McBain and Kistler.42 Using Bechhold's precipitation membranes, Kroepelin and Brumshagen determined the osmotic pressure of rubber benzenosols. 43 Mark and Meyer44 used porcelain filters in similar measurements.…”

Section: Evidence Of Colloidalitymentioning

confidence: 99%

Hydrocarbons as Dispersion Media

Soyenkoff¹

1931

J. Phys. Chem.

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In a previous communication,1 evidence was brought to show that peptization and colloid stability can occur in the absence of ions. It still remained to find whether such behavior was exceptional or usual in the case of non-polar liquids as dispersion media.Chemical literature contains numerous references to colloid systems in benzene and other hydrocarbons. For the purposes of a preliminary discussion, we shall classify these organosols according to the methods employed in preparing them, since the latter at least indicate the chemical composition of the dispersed phase,-a point on which other data often are lacking.Among the dispersion methods, electrical dispersion was resorted to by Svedberg2 to obtain sodium and potassium sols in ligroin, pentane and liquid methane. In spite of the painstaking precautions taken to insure the purity of the solvent and prevent its decomposition by the oscillatory discharge, the resulting sols were unstable.Hall50 prepared dispersions of aluminium (and apparently also of silver, copper, lead and iron) by means of a 1000 v. a.c. arc in "high grade transformer oil." In some cases, the dispersed phase settled out rapidly (f. inst. copper in 24 hours).

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Section: Evidence Of Colloidalitymentioning

confidence: 99%