Long-Range Hydrophobic Forces between Mica Surfaces in
Long-Range Hydrophobic Forces between Mica Surfaces in Dodecylammonium Chloride Solutions in the Presence of Dodecanol. Roe-Hoan Yoon,; S.A. ...
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Long-Range Hydrophobic Forces between Mica Surfaces in
Long-Range Hydrophobic Forces between Mica Surfaces in Alkaline ... the coadsorption of dodecylammonium ions and dodecylamine, which increases the ... Hydrophobic Forces in Thin Water Films Stabilized by Dodecylammonium Chloride.
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Long-Range Attraction between a Hydrophobic Surface and a Polar
Long-range attractive forces have been measured in the surface forces apparatus (SFA), for both a symmetrical situation with two mica surfaces made hydrophobic by surfactant adsorption ..... M dodecylammonium chloride causes the long-.
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pH-Dependent Interactions of Mica Surfaces in Aqueous
surface force apparatus. A t low pH the surfaces undergo charge reversal as dodecylammonium ions adsorb ... hydrophobic attraction is observed between the surfactant monolayers. ... cylammonium (DAH+) chloride influences the forces acting between ..... double-layer force dominates the long-range interaction, followed ...
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ADSORPTION OF POLYELECTROLYTES ON MICA
most importantly of the forces acting between the surfaces as a function of their ... ditions are such that long-range repulsive steric forces are generated. This is ... chloride (MAPTAC). ... segments of the 40% hydrophobically modified polyelectrolyte. 40DT. Fig. ...... surfaces immersed in dodecylammonium chloride solution. J.
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From hydration repulsion to dry adhesion between asymmetric
Oct 6, 2015 ... asymmetric hydrophilic and hydrophobic surfaces ... below a threshold separation and cavitation gives rise to long-range attraction, depends on ... central issue in all fields concerned with forces between surfaces, colloids ...... surfaces in dodecylammonium chloride solutions in the presence of dodecanol.
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HYDROPHOBIC FORCES IN FREE THIN FILMS OF - Virginia Tech
Besides long-range electrostatic repulsive forces at ... determine equilibrium film thicknesses of dodecylammonium chloride and sodium dodecyl sulfate .... The force vs. distance curves between two asphaltene-coated mica surfaces at pH. 5.8.
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chapter 1 - Virginia Tech
forces between different mineral surfaces and a hydrophobic glass sphere. ... hydrolyzable surfactant such as dodecylammonium hydrogenchloride (DAHCl). ... These authors attributed the presence of long range hydrophobic ... 21] conducted force measurements between cylindrical mica sheets in solutions of DAHCl.
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Chapter 1 Introduction
Herder (44) measured the hydrophobic forces between mica surfaces in solutions of dodecylammonium hydrochloride (DAHCl) and octylammonium .... authors observed exceptionally long-range hydrophobic forces extending upto 300 nm, which ...... (DOAHCl) chloride solutions in the presence and absence of octanol.
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Surfactants at non-polar surfaces - DiVA
The adsorption of sugar surfactants to an isolated hydrophobic .... Paper 4 deals with surface forces measurements between two crystalline .... No long-range repulsive force is present, and a jump into .... Muscovite mica is such a material. ..... for dodecyl ammonium chloride and their calculations supported the use of the ...
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Full-Text PDF - MDPI
Sep 18, 2009 ... which present positional and/or orientational long range order in ... first studies on the effect of MLC on the lubricating properties of ... confined between mica surfaces, with lower values for shear along .... The tribological behaviour of the ionic liquid crystal n-dodecylammonium chloride has been compared.
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methylene blue adsorption on the basal surfaces of kaolinite
between the hydrophilic and hydrophobic basal surfaces of kaolinite, as well as .... (SPC) water and aqueous chloride ions were taken from the literature ... 10.0 A ˚ was used for short-range interactions, and long- ..... mica surface (Yu et al., 2003). Details of ..... interaction of oleate and dodecylammonium chloride surfactants ...
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METHYLENE BLUE ADSORPTION ON THE BASAL SURFACES OF
between the hydrophilic and hydrophobic basal surfaces of kaolinite, as well as .... 10.0 A˚ was used for short-range interactions, and long- ..... mica surface (Yu et al., 2003). Details of ..... interaction of oleate and dodecylammonium chloride.
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On the Oil Repellency of Nanotextured Aluminum Surface
Abstract—Two different superhydrophobic surfaces were elaborated and their .....  R.-H Yoon, and S. A Ravishankar, “Long-Range Hydrophobic Forces between Mica Surfaces in Alkaline Dodecylammonium Chloride. Solutions”, J. Colloid ...
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Flotation Chemistry and Technology of Nonsulfide Minerals - Utah
water-soluble collector species, though in others, the hydrophobic surface state is ... With respect to flotation rate, the variation is great, with long retention times ( even ... quartz with 4 x 10"5 M dodecyl ammonium acetate additions ..... surfactant adsorption on muscovite mica and the interaction force between mica surfaces.
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Methods of enhancing fine particle dewatering
Feb 15, 2005 ... e erences l e. Yoon and Ravishankar, “Long—Range Hydrophobic Forces ... between Mica Surfaces in Dodecylammonium Chloride. Solutions ...
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Methods of using natural products as dewatering aids for fine particles
Mar 4, 2003 ... in Thin Water Films Stabilized by Dodecylammonium Chlo. (51) Int' Cl' ... References Clted phobic Forces betWeen Mica Surfaces in Dodecylammo. U_S_ PATENT DOCUMENTS nium Chloride Solutions in the Presence of Dodecanol,” J. ..... observed long-range hydrophobic forces only When close.
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Efecto de la concentración de surfactantes iónicos en el
surfactants (cetylpyridinium chloride and dodecylamine hydrochloride) and one anionic ... interactions at the asphaltene surface. ... It has long been suggested that in the ..... of asphaltene is positive in the whole pH range ... involve mainly hydrophobic interactions between .... precipitation of dodecylamine at a mica/ water.
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Full-Text PDF - MDPI.com
Aug 20, 2009 ... the silicate organophilic and hydrophobic and lowers the surface ... spacing in a given temperature range: the cation exchange capacity of ... According to X-ray diffraction (XRD) data, the organic chains have been long thought to lie either .... electrostatic forces of interaction between the clay platelets could ...
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Transport of colloids in unsaturated porous media - University of
Dec 5, 2003 ... the colloids at the AWI are larger than the energy barrier between the colloids. Therefore ... additional unknown attractive forces when hydrophobic ..... distance from the surface of 1 and 2, or in this case colloids ..... long as there is an AWI. .... submerged in dodecylammonium chloride solution, Langmuir, 6,.
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