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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"organosilica"”.
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Periodic Mesoporous Organosilica: Preparation Characterization and Applications of Novel Materials
… a great interest in the field of porous organosilica materials because of the high surface areas (> 1000 m²/g) and narrow pore size distributions which are beneficial for applications such as chromatography, chiral catalysis, sensing or selective adsorption. Periodic mesoporous …
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Mesoporous organosilica materials with amine functions : surface characteristics and chirality
In this work mesoporous organisilica materials are synthesized through the silica sol-gel process. For this a new class of precursors which are also surfactant are synthesized and self-assembled. This leads to a high surface area functionality which is analysized with copper (II) and water …
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Application of PEO-PPO-PEO Triblock Copolymers in Synthesis of Silica and Organosilica Nanomaterials
… silica nanotube structures as well as bridged organosilica nanotubes by using swollen micelles of Pluronic surfactants and their mixtures. Chapter 1 introduced the background and several important mesoporous structures, and the relevant topics in this dissertation, such as, silica nanotubes, …
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Amino acid-derived imidazolium salts: platform molecules for N-Heterocyclic carbene metal complexes and organosilica materials
… The imidazolium salts were also used to produce organosilica hybrid materials. This was attempted via two methods: by post-grafting onto a commercial organosilica, and co-condensation of the corresponding organosilane. The co-condensation technique harbours potential for the production of …
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Flexible and Versatile Soft Templates for Mesoporous Silicas and Organosilicas Based on Pluronic Block Copolymer Surfactants and their Mixtures
… as well as single-micelle-templated silica and organosilica nanotubes and nanospheres using triblock copolymer surfactants and their mixtures in the presence of a swelling agent. The introductory section, Chapter 1, will address the current state of the tunability of single-micelle-templated …
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Integrating polarisation effects into non-polarisable models to better model the self-assembly of mesoporous silica nanomaterials
… into a generic, transferable force field for organosilica molecules. In this work, we demonstrated that the current modelling paradigm for water, the solvent in which mesoporous silica synthesis takes place, is fundamentally flawed when it comes to accounting for the cost of polarisation in …
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Self-Structuring of functionalized micro- and mesoporous organosilicas using boron-silane-precursors
… dedicated to the targeted design of functional organosilica materials. In this context a new precursor concept based on boron-silanes is presented. These precursors combine the properties of a structure directing group and a silica source by covalent borane linkage. Formation of the precursor is …
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Synthesis and Environmental Applications of Mesoporous Alumina
… applications. Also, nitrogen-containing organosilica-alumina composites were synthesized in the presence of tris[3-(trimethoxysilyl)propyl] isocyanurate and examined for carbon dioxide adsorption. Finally, numerous environmental applications of mesoporous alumina were discussed.
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Nanostructured hybrid organic/inorganic materials by the nanobuilding blocks (NBB) approach
… obtained with a modified Stöber method and organosilica NP were obtained. The NP were characterised by FT-IR and NMR spectroscopies. Morphology was observed and sizes calculated using SEM; N2- physisorption and thermal analyses (TG/DTA) were also carried out in order to complete the …