An Introduction To The Physics And Chemistry Of Colloids

Paperback | October 12, 2012

byEmil Hatschek

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...due to removal of water from one phase into the other. Among the sols with continuous phases other than water the most interesting are undoubtedly the sols of cellulose and of its nitroderivatives, which have assumed great industrial importance in recent years, as the materials for the production of artificial silk, etc. As is well known, cellulose is dissolved by cupric oxide-ammonia solution, forming a typical emulsoid sol of very high viscosity, from which the cellulose can be precipitated as a coherent gel by neutralising the solvent with acid. Cellulose is also gradually dissolved by a 50 per cent zinc chloride solution at about 60, and this sol is characterised by an even higher viscosity than the cuprammonium sol. The nitro-celluloses--collodion and gun-cotton--form sols with a whole series of solvents, such as glacial acetic acid, acetone, ether-alcohol, amyl acetate, etc., all of which show the typical emulsoid properties: very high, but ELECTRICAL PROPERTIES OF EMULSOID SOLS. 51 inconstant, viscosities, and slight turbidity or opalcscence. With one of these sols, the acetic acid collodion, we are already familiar as a material for making ultra nlters: these sols leave a coherent gel like mass when the acetic acid is removed by water. Many of the other nitrocellulose sols leave coherent films on drying, the properties of which can be modified by various additions, such as castor oil or camphor. No special reference has so far been made to the electrical condition of the emulsoids, but from what has been stated in regard to salting out and related phenomena it is obvious that there is a profound difference between the suspensoids and emulsoids in this respect. The electric properties of the latter are not nearly as unambiguous as...

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...due to removal of water from one phase into the other. Among the sols with continuous phases other than water t...

Format:PaperbackDimensions:28 pages, 9.69 × 7.44 × 0.06 inPublished:October 12, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217775268

ISBN - 13:9780217775267

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