A swellable polyelectrolyte gel-like layer on the surface of hydrous metal oxides in simple electrolyte solutions: Hematite vs. silica colloids
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10367697" target="_blank" >RIV/00216208:11310/17:10367697 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.colsurfa.2016.11.018" target="_blank" >https://doi.org/10.1016/j.colsurfa.2016.11.018</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.colsurfa.2016.11.018" target="_blank" >10.1016/j.colsurfa.2016.11.018</a>
Alternative languages
Result language
angličtina
Original language name
A swellable polyelectrolyte gel-like layer on the surface of hydrous metal oxides in simple electrolyte solutions: Hematite vs. silica colloids
Original language description
To elucidate the puzzling surface structure of hydrophilic colloidal particles of metal oxides dispersed in aqueous solutions, we reanalysed seemingly anomalous coagulation kinetics experiments carried out by various authors on nonporous as well as porous near-spherical iron oxide-hematite colloids synthesized by forced hydrolysis. The swelling degree of the shell (mimicking a loose gel layer of uniform fixed charge due to the ionization of functional groups) of the core-shell- modelled crystalline colloids was found to scale with the concentration of coagulating uni-univalent electrolyte according to the simple power law with the exponent of -3/5. In polymer physics, this scaling law was derived for swellable polyelectrolyte gels with a low degree of crosslinking, in which a delicate balance between competing thermodynamic forces is established. The same scaling law has recently been found by us to apply in colloidal systems of amorphous silica, indicating a more generalizable appearance of the swelling gel phase at the metal oxide/solution interface than previously thought.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN
0927-7757
e-ISSN
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Volume of the periodical
513
Issue of the periodical within the volume
January
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
5
Pages from-to
463-467
UT code for WoS article
000390365500054
EID of the result in the Scopus database
2-s2.0-85002374040