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- W2028473411 abstract "Samples of natural Brazilian quartz were variously covered with dodecylamine chloride (DDACl) from methanolic solutions. Then they were subjected to flotation tests and ζ potential measurements in doubly distilled water. In the second series of experiments the samples covered with DDACl were then covered with known amounts of n-hexane or n-hexanol and ζ potentials were determined. From this relationship dispersion and polar components of surface free energy of the quartz samples were calculated. The results obtained allow us to conclude that already at 0.25 statistical monolayer of DDACl the sample of quartz floats in 90%, which is connected with drastic reduction of the polar component of quartz surface free energy from 115 mJ/m2 (bare surface) to 7.2 mJ/m2. The maximum flotation activity appears at one statistical monolayer of the amine, and corresponds to complete reduction of the polar interactions at the quartz-water interface." @default.
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- W2028473411 date "1986-07-01" @default.
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- W2028473411 title "Correlation of surface free energy changes and flotability of quartz" @default.
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- W2028473411 doi "https://doi.org/10.1016/0021-9797(86)90065-2" @default.
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