The Stability of Detonation Nanodiamond Hydrosols in the Presence of Salts and Surfactants

The Stability of Detonation Nanodiamond Hydrosols in the Presence of Salts and Surfactants The regions of stability and coagulation of hydrosols of oxidized detonation nanodiamonds in the presence of inorganic salts and surfactants of different types have been determined. Concentration C c of inorganic salts corresponding to the onset of the growth of aggregates in a hydrosol dramatically decreases with an increase in coagulating ion charge z: C c ~ z −5.3. Anionic and nonionic surfactants stabilize dispersions of nanodiamonds, while additives of cationic and zwitterionic surfactants cause coagulation. The study of the coagulating effect of alkylpyridinium chlorides has shown that the coagulation threshold halves upon elongation of the hydrocarbon chain in a surfactant molecule by a СН2 group. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloid Journal Springer Journals

The Stability of Detonation Nanodiamond Hydrosols in the Presence of Salts and Surfactants

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Publisher
Pleiades Publishing
Copyright
Copyright © 2018 by Pleiades Publishing, Ltd.
Subject
Chemistry; Polymer Sciences; Surfaces and Interfaces, Thin Films
ISSN
1061-933X
eISSN
1608-3067
D.O.I.
10.1134/S1061933X18030146
Publisher site
See Article on Publisher Site

Abstract

The regions of stability and coagulation of hydrosols of oxidized detonation nanodiamonds in the presence of inorganic salts and surfactants of different types have been determined. Concentration C c of inorganic salts corresponding to the onset of the growth of aggregates in a hydrosol dramatically decreases with an increase in coagulating ion charge z: C c ~ z −5.3. Anionic and nonionic surfactants stabilize dispersions of nanodiamonds, while additives of cationic and zwitterionic surfactants cause coagulation. The study of the coagulating effect of alkylpyridinium chlorides has shown that the coagulation threshold halves upon elongation of the hydrocarbon chain in a surfactant molecule by a СН2 group.

Journal

Colloid JournalSpringer Journals

Published: Jun 1, 2018

References

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