Solvothermal removal of the organic template from L 3 ("sponge") templated silica monoliths

Daniel M. Dabbs; Norbert Mulders; Ilhan A. Aksay

doi:10.1007/s11051-005-9063-4

Solvothermal removal of the organic template from L ₃ ("sponge") templated silica monoliths

Daniel M. Dabbs, Norbert Mulders, Ilhan A. Aksay

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We compare the methods of continuous solvent (Soxhlet) and supercritical solvent extractions for the removal of the organic template from nanostructured silica monoliths. Our monoliths are formed by templating the L ₃ liquid crystal phase of cetylpyridinium chloride in aqueous solutions with tetramethoxy silane. The monoliths that result from both Soxhlet and supercritical extraction methods are mechanically robust, optically clear, and free of cracks. The Soxhlet method compares favorably with supercritical solvent extraction in that equivalent L ₃-templated silica can be synthesized without the use of specialized reactor hardware or higher temperatures and high pressures, while avoiding noxious byproducts. The comparative effectiveness of various solvents in the Soxhlet process is related to the Hildebrand solubility parameter, determined by the effective surface area of the extracted silica.

Original language	English (US)
Pages (from-to)	603-614
Number of pages	12
Journal	Journal of Nanoparticle Research
Volume	8
Issue number	5
DOIs	https://doi.org/10.1007/s11051-005-9063-4
State	Published - Oct 2006

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Atomic and Molecular Physics, and Optics
Modeling and Simulation
Materials Science(all)
Condensed Matter Physics

Keywords

Extraction
High surface area silica
Nanostructured ceramics
Supercritical solvent
Synthesis

Access to Document

10.1007/s11051-005-9063-4

Cite this

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title = "Solvothermal removal of the organic template from L 3 ({"}sponge{"}) templated silica monoliths",

abstract = "We compare the methods of continuous solvent (Soxhlet) and supercritical solvent extractions for the removal of the organic template from nanostructured silica monoliths. Our monoliths are formed by templating the L 3 liquid crystal phase of cetylpyridinium chloride in aqueous solutions with tetramethoxy silane. The monoliths that result from both Soxhlet and supercritical extraction methods are mechanically robust, optically clear, and free of cracks. The Soxhlet method compares favorably with supercritical solvent extraction in that equivalent L 3-templated silica can be synthesized without the use of specialized reactor hardware or higher temperatures and high pressures, while avoiding noxious byproducts. The comparative effectiveness of various solvents in the Soxhlet process is related to the Hildebrand solubility parameter, determined by the effective surface area of the extracted silica.",

keywords = "Extraction, High surface area silica, Nanostructured ceramics, Supercritical solvent, Synthesis",

author = "Dabbs, {Daniel M.} and Norbert Mulders and Aksay, {Ilhan A.}",

note = "Funding Information: Support for this research was provided by support from Lucent Technologies and the DARPA-sponsored MURI program at Princeton University (Grant # DAAH04-95-1-0102). Additional support was provided by NASA under the BIMat URETI (Grant # NCC-1-02037).",

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doi = "10.1007/s11051-005-9063-4",

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AU - Dabbs, Daniel M.

AU - Mulders, Norbert

AU - Aksay, Ilhan A.

N1 - Funding Information: Support for this research was provided by support from Lucent Technologies and the DARPA-sponsored MURI program at Princeton University (Grant # DAAH04-95-1-0102). Additional support was provided by NASA under the BIMat URETI (Grant # NCC-1-02037).

PY - 2006/10

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N2 - We compare the methods of continuous solvent (Soxhlet) and supercritical solvent extractions for the removal of the organic template from nanostructured silica monoliths. Our monoliths are formed by templating the L 3 liquid crystal phase of cetylpyridinium chloride in aqueous solutions with tetramethoxy silane. The monoliths that result from both Soxhlet and supercritical extraction methods are mechanically robust, optically clear, and free of cracks. The Soxhlet method compares favorably with supercritical solvent extraction in that equivalent L 3-templated silica can be synthesized without the use of specialized reactor hardware or higher temperatures and high pressures, while avoiding noxious byproducts. The comparative effectiveness of various solvents in the Soxhlet process is related to the Hildebrand solubility parameter, determined by the effective surface area of the extracted silica.

AB - We compare the methods of continuous solvent (Soxhlet) and supercritical solvent extractions for the removal of the organic template from nanostructured silica monoliths. Our monoliths are formed by templating the L 3 liquid crystal phase of cetylpyridinium chloride in aqueous solutions with tetramethoxy silane. The monoliths that result from both Soxhlet and supercritical extraction methods are mechanically robust, optically clear, and free of cracks. The Soxhlet method compares favorably with supercritical solvent extraction in that equivalent L 3-templated silica can be synthesized without the use of specialized reactor hardware or higher temperatures and high pressures, while avoiding noxious byproducts. The comparative effectiveness of various solvents in the Soxhlet process is related to the Hildebrand solubility parameter, determined by the effective surface area of the extracted silica.

KW - Extraction

KW - High surface area silica

KW - Nanostructured ceramics

KW - Supercritical solvent

KW - Synthesis

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