Results 211 to 220 of about 27,310 (258)

Optical properties of colloidal carbon and colloidal silica films

Applied Optics, 1988
Colloidal silica films on glass produced by withdrawal from colloidal baths are of value as antireflection coatings. The effect of particle size on the refractive index and density of these films was determined, and the optimum particle diameter for maximum transmittance of solar radiation through glass was estimated at 45 nm.
R M, Vegners, D R, McKenzie, R J, Hunter
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Effect of colloidal silica dispersions on the properties of PDMS‐colloidal silica composites

Journal of Applied Polymer Science, 2012
AbstractPolydimethylsiloxane (PDMS) colloidal silica composites prepared with the use of the dispersion of colloidal silica (CS) of similar particle size and distribution in different mediums/solvents are investigated for their rheological, thermal, and mechanical properties.
Dinkar Sumi, A. Dhanabalan, B. H. S. Thimmappa, Sriram Krishnamurthy   +3 more
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Slow aggregation of colloidal silica

Physical Review A, 1987
We report the results of elastic and quasielastic light scattering measurements on dilute aggregates of colloidal silica. The elastic scattering measurements indicate a fractal dimension of 2.05\ifmmode\pm\else\textpm\fi{}0.06, in agreement with previous results, but the quasielastic measurements demonstrate several novel characteristics.
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Adsorption of Colloidal Silica on Alumina and of Colloidal Alumina on Silica

Journal of the American Ceramic Society, 1964
The mutual adsorption of colloidal silica on alumina and of colloidal alumina on silica and silicate materials occurs in aqueous suspension at about pH 4. It is shown that the adsorption of colloidal particles on the surface of opposite charge is limited to essentially a monoparticle layer.
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Hybrids of colloidal silica and waterborne polyurethane

Journal of Colloid and Interface Science, 2006
Waterborne polyurethane (WPU) was synthesized and followed by adding colloidal silica to prepare WPU-silica hybrids. The silica content in the hybrid thin films was varied from 0 to 50 wt%. The experimental results revealed that the viscosity of these hybrid solutions increased with increasing silica content and resulted in the aggregation of silica ...
Chien-Hsin, Yang, Feng-Jiin, Liu, Yun-Peng, Liu, Wei-Tung, Liao   +3 more
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Mesoporous silica spheres from colloids

Journal of Colloid and Interface Science, 2007
A novel method has been developed to synthesize mesoporous silica spheres using commercial silica colloids (SNOWTEX) as precursors and electrolytes (ammonium nitrate and sodium chloride) as destabilizers. Crosslinked polyacrylamide hydrogel was used as a temporary barrier to obtain dispersible spherical mesoporous silica particles.
Ho, Jenny, Zhu, Wei, Wang, Huanting, Forde, Gareth   +3 more
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Colloid Geochemistry of Silica

1979
Silica, SiO2, is common in nature and occurs as seven distinct minerals, of which five show crystalline structures (quartz, tridimite, cristobalite, coesite, and stishovite) and two are amorphous (opal-A and lechatelierite). Lechatelierite is a silica glass and is very rare.
Shmuel Yariv, Harold Cross
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Porous Structure of Silica Colloidal Crystals

Langmuir, 2019
We prepared silica colloidal crystals with different pore sizes using isothermal heating evaporation-induced self-assembly in quantities suitable for nitrogen porosimetry and studied their porous structure. We observed pores of two types in agreement with the description of silica colloidal crystals as face-centered cubic packed structures containing ...
Andrey Galukhin, Dmitrii Bolmatenkov, Alina Emelianova, Ilya Zharov, Gennady Y. Gor   +4 more
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Clays and Colloidal Silicas

1998
Clays can lay claim to being the starting point for fine particle technology in the history of mankind. Their use in constructing shelters and in pottery manufacture far predates recorded history. Their particular crystalline structure which confers the plastic-like rheological behavior necessary for forming bricks, plugging holes, and making pottery ...
Jan-Erik Otterstedt, Dale A. Brandreth
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Gradient centrifugation of viruses in colloidal silica

Virology, 1967
Abstract Density gradients are generated in colloidal silica sol after a short centrifugation at high speed, depending on the large variation in size of the colloidal particles. Tobacco mosaic virus, adenovirus, and poliovirus can be isolated in sharp bands in these gradients.
H, Pertoft, L, Philipson, P, Oxelfelt, S, Höglund   +3 more
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