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Use of Pluronic F108 as a Cosurfactant in a Synthesis of Mesoporous Silica Microspheres with Bimodal Pore Size Distribution

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Large mesoporous silica microspheres with bimodal pore size distributions will be very promising in a special application. Silica microspheres of 10–100 μm 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.
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Keywords: BIMODAL PORE STRUCTURE; BIS(2-ETHYLHEXYL)-PHOSPHATE; MESOPOROUS SILICA MICROSPHERE; PLURONIC F108; POLY(ETHYLENE GLYCOL)-POLY(PROPYLENE GLYCOL) TRIBLOCK COPOLYMER

Document Type: Research Article

Publication date: 2008-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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