Abstract
Polydimethylsiloxane-poly(ethylene oxide) (PDMS-PEO) has been successfully used as the co-template to prepare ordered mesoporous polymer-silica and carbon-silica nanocomposites with diverse mesostructures by using Pluronic F127 or P123 as main templates and phenolic resol polymer as a carbon precursor via the strategy of evaporation-induced self-assembly (EISA). The structures of resulting mesoporous materials have been characterized by small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and nitrogen-sorption measurements. Experiments show that the ordered mesoporous polymer-silica and carbon-silica nanocomposites of two-dimensional hexagonal (p6m) and body-centered cubic (\( Im\bar{3}m \)) mesostructure have been achieved. A novel lamellar polymer-silica mesostructure stable up to 350 °C calcination is also obtained. Higher hydrophobicity of PDMS than PPO is believed to be the key factor that influences the swelling of F127 micelles and their further self-assembly behaviors into ordered mesostructures, resulting in different symmetries of the mesostructures. Surfactant removal and subsequent carbonization creates ordered mesoporous polymer-silica and carbon-silica nanocomposites, respectively. This simple one-pot route provides a pathway for large-scale convenient synthesis of polymer-silica and carbon-silica nanocomposites.
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