Use of Pluronic F108 as a Cosurfactant in a Synthesis of Mesoporous Silica Microspheres with Bimodal Pore Size Distribution
Abstract:Large mesoporous silica microspheres with bimodal pore size distributions will be very promising in a special application. Silica microspheres of 10–100 m in size were synthesized using n-dodecylamine and polymeric surfactant as co-templating agents at room temperature. Surface area and large pore volume of the mesoporous silica microspheres were 884–1009m2/g and 1.25–1.68 cm3/g, respectively, depending on the reaction conditions. Mesoporous silica microspheres prepared using a short-chained alkylamine surfactant and a long-chained polymeric surfactant exhibited distinct bimodal pore size distribution, that is, small (<3 nm) and large mesopores (>20 nm). Pluronic F108, which is a poly(ethylene glycol)-poly(propylene glycol) triblock copolymer, played an important role in the formation of the large mesopores as well as the formation of stable silica microspheres without strong aggregation between particles.
Document Type: Research Article
Publication date: October 1, 2008
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