Tailoring porous silica films through supercritical carbon dioxide processing of fluorinated surfactant templates

Article Abstract:

The acid-catalyzed synthesis of mesoporous thin films are reported, using a series of perfluoroalkylpyridinium chloride surfactants as pore templates, along with the effect of C[O.sub.2] processing on the structure of the thin films. The varying degree of C[O.sub.2] induced expansion is due to the solvation of the C[O.sub.2]-philic fluorinated tail and is interpreted from interfacial behavior of the cationic fluorinated surfactant templates at the C[O.sub.2]-water interface.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Silicon Dioxide, Analysis, Electric properties, Chemical synthesis

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Monte Carlo simulations of size and structure of gel precursors in silica polycondensation

Article Abstract:

It is observed that the evolution of the connectivity distribution with respect to conversion is consistent across a range of moderately acidic synthesis conditions based on the data on hydrolytic polycondensation of alkoxysilanes. The molecular weight distribution of silica as a function of conversion is presented, in reasonable agreement with available experiments, using Monte Carlo dynamic simulations including nearest-neighbour effects and cyclization. `

Usage, Metallic oxides, Metal oxides, Simulated annealing (Mathematics)

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Interfacial alignment mechanism of forming spherical silica with radially oriented nanopores

Article Abstract:

The mechanism of forming silica spherical particles with radially orientated mesopores is investigated. Both intermediate and final products formed during precipitation of silica and cetytrimethylammonium bromide (CTAB) from solutions of ethanol, water, and ammonia are also examined.

Industrial organic chemicals, not elsewhere classified, Nitrogenous Fertilizer Manufacturing, Ethanol, Ethyl Alcohol Manufacturing, Nitrogenous fertilizers, Ammonia, Alcohol, Bromides, Alcohol, Denatured, Bromides (Chemistry)

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