Coagulation-condensation structure formation in aqueous suspensions of mixtures of sulfur and gypsum
Abstract
The characteristics of structure formation in hydrosuspensions of powdered sulfur and its mixtures with gypsum was investigated. The effect of cationic (CTAB) and anionic (SDBS) surfactants on the surface tension of water; ζ-potential of the sulfur particles and wettability of sulfur was learned. Both surfactants at low concentrations; lead to an increase in plastic strength (Pm) of the suspension; and at high concentrations (above CMC) – they lead to Pm reduce. In addition; it was found that the surfactants substantially change ζ-potential of the sulfur particles – cationic surfactants lead to charge exchange and anionic surfactants increase the negative charge of the particles. These changes are the result to restructuring in the adsorption layers of surfactants - the formation of a saturated mono-layer while up to Pm maximum; bilayer - after CMC (while the Pm is reducing).
References
Khalikov S.S., Khalikov M.S. Preparaty na osnove nanodispergirovannoi sery dlya selkhozyaiskogo khazyaistva // Vestnik Bashkirskogo universiteta. – 2011. – Т. 16. – №1. – P. 39-42.
Scherer H.W., Welp G., Förster S. Sulfur fractions in particle-size separates as influenced by long-term application of mineral and organic fertilizers // PLANT SOIL ENVIRON. – 2012. – V. 58, № 5. – P. 242-248.
Zheng W., Liu Y.W,. Hua X.G., Zhang C.F. Novel nanosized adsorbing sulfur composite cathode materials for the advanced secondary lithium batteries // Electrochimica Acta. – 2006. – V. 51, № 7. – P.1330-1335.
Dolzhikova V.D., Zadymova N.M., Lopatina L.I. Praktikum po kolloidnoi khimii. – Infra-M, Vuzovskiy uchebnik, 2012. – 288 p.
Shchukin E.D., Pertsov A.B,. Amelina E.A. Kolloidnaya khimiya. – 5-е izd.,ispr. - М.: Vyssh.shк, 2007. – 444 p.
Urev N.B. Strukturirovannye dispersnye sistemy. // Sorosovskiy obrazavatelnyy zhurnal. –1998. – № 6. – P. 42- 47.
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