Date of Award

6-1940

Document Type

Union College Only

Degree Name

Bachelor of Science

Department

Chemistry

Language

English

Abstract

This research was a quantative study of the polymerization of silicic acid molecules which occurred during the process of gel formation by the means of dialysis. The condensation of the silicic acid molecules, Si(OH)4, to form larger molecules of colloidal size, as suggested by the polysilicic acid fibriller theory, was investigated with membrances of known pore size at various stages of the reaction. Although filter and membrane action is only to a limited extent comparable with the action of a sieve, and is much more dependent on the absorption in the capillaries than the size of the pores, still a close connection between the concentration of membranes and the size of particles held back by them has been reported (1) and it was hoped that by this means the mechanism of the condensation of polysilicic acids could be studies to some extent.

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