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Wettability of Kaolinite Treated with Ammonia. Methylanline, Ethylamine. or Their Corresponding Cations
Author(s) -
KITAHARA AYAO,
WILLIAMSON W. O.
Publication year - 1964
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1964.tb12991.x
Subject(s) - kaolinite , ethylamine , wetting , crystallinity , ammonia , ammonium , montmorillonite , chemistry , inorganic chemistry , contact angle , chemical engineering , mineralogy , organic chemistry , crystallography , engineering
Equations developed from simplifying assumptions related the flow rate of water into kaolinite plugs to the clay‐water contact angle, and showed that the wettabilities were reduced by ammonium, methylammonium, or ethylammonium as exchangeable cations, or by ammonia, methyl‐amine, or ethylamine as physically held adsorbates. Poorly crystalline kaolinites were especially affected by these cations. Both the exchangeable cations and the crystal surfaces between the exchange sites influenced wettability. These surfaces, unless partly or completely covered by ammonia or amines, enhanced wettability when crystallinity was poor. Ethylamine markedly decreased the wettability of kaolinite with good crystallinity, probably because it was difficult to displace from cavities in the stacklike crystals. Kaolinite with montmorillonite behaved anomalously.