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dc.contributor.advisor Milligan, W. O.
dc.creatorKanesaka, Kazuaki
dc.date.accessioned 2016-04-21T12:01:08Z
dc.date.available 2016-04-21T12:01:08Z
dc.date.issued 1963
dc.identifier.citation Kanesaka, Kazuaki. "The fine structure of cupric ferrocyanide semipermeable membranes." (1963) Master’s Thesis, Rice University. https://hdl.handle.net/1911/89029.
dc.identifier.urihttps://hdl.handle.net/1911/89029
dc.description.abstract Electron microscopic and electron diffraction studies have been carried out on cupric ferrocyanide gels, chosen as a prototype of an inorganic semi-permeable membrane. It was believed that a study of the structure and morphology of such membranes, which are seemingly less complicated than the important organic semi-permeable membranes surrounding all living cells, will throw light on the little understood phenomenon of semi-permeability. It has been found that cupric ferrocyanide gels consist of loosely and randomly packed primary particles in the size range of 10 to 30 A. The pore space is the interstices between the particles. The primary particles are crystalline, the electron and x-ray diffraction patterns corresponding to the standard pattern of Cu2Fe(CN)6. However, samples prepared and washed very rapidly exhibit more disorder, and consist of extremely small and imperfect crystals, or may be essentially amorphous, in the sense that liquid type diffraction patterns are observed. Aging under moderate conditions results in an increase in crystal size to the range of 30 to 200 A. This observation may explain why many earlier investigators aged and washed for a long time the practical cupric ferrocyanide membranes deposited in the pore space of a parchment thimble or porous clay cup, inasmuch as the film or membrane composed of large crystals may be stronger, and thus serves as a better semi-permeable membrane. In view of the small primary particle size and the small size of the interstices, it is concluded that among the classical theories of semi-permeability, the adsorption theory is predominant, but that solution and size effects play an important role.
dc.format.extent 36 pp
dc.language.iso eng
dc.title The fine structure of cupric ferrocyanide semipermeable membranes
dc.type Thesis
dc.identifier.digital RICE0064
dc.type.material Text
thesis.degree.department Chemistry
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Arts
dc.format.digitalOrigin reformatted digital
dc.identifier.callno Thesis Chem. 1963 Kanesaka


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