Mechanical and hydrothermal stabilities of aged periodic mesoporous organosilicas

Article Abstract:

The effects of aging, mechanical and hydrothermal treatments on the microstructures of periodic mesoporous organosilicas (PMOs) are presented using nitrogen gas sorption, thermogravimetry, and X-ray diffraction (XRD). Results of XRD, nitrogen sorption, and thermogravimetric studies support the concept of mechanochemical silicate hydrolysis as the driving force behind microstructural collapse in these nanoporous materials.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Organosilicon Compounds, Usage, Observations, X-rays, X-ray diffraction, Thermal properties, Mechanical properties

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A spin probe study of mesoporous silica formation via a neutral templating route

Article Abstract:

The structure of dodecylamine aggregates acting as templates in the synthesis of mesoporous silica are studied via the EPR spectra of a variety of spin probes and of a spin-labeled silica precursor. The surfactant-silica interaction is critically dependent on solvent and data shows that silica network cross-linking becomes important only above 90 degree Celsius.

Management dynamics, Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Management, Silica, Company business management, Electron paramagnetic resonance, Chemical synthesis, Chemical properties, Silicon dioxide

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