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Mesostructured materials: Synthesis towards applications
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
2007 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

A new class of materials with well-defined structures on mesoscopic (2-50 nm) length scales has attracted considerable interest during the last decade. These mesostructured mataterials are formed from the self-assembly of amphiphillic molecules and inorganic precursors. The aim of this thesis has been to develop preparation methods that are scalable, and at the same time allow for efficient structural control coupled with possibility to incorporate different functionalities.

Two different industrial processes for production of particles with spherical morphology were successfully tailored for synthesis of well-ordered mesostructured particles. An existing spray drying method for a fast and continuous production was further developed, and for the first time, an emulsion-based method was implemented. The latter method resulted in superior control of both particle size and internal mesostructure.

Mesostructured photochromic pigments were synthesised by incorporating photochromic dyes in the organic domains of the surfactant templated inorganic/organic mesostructured silica particles. The pigments were produced using a one-pot synthesis method employing an aerosol reactor, allowing control over both the internal mesostructure and the dye content. We show that transparent photochromic films can be prepared using latex binders and conventional coating technology.

Mesoporous magnetic carrier materials were prepared by adding iron oxide nanoparticles during either the emulsion- or aerosol processing. The surfactant templated silica matrix displayed well-ordered internal pore architecture with limited pore blocking caused by the incorporated iron oxide nanoparticles. The iron oxide content was precisely controlled, and the magnetic properties were preserved during the processing. Finally we demonstrate that these materials can be used to magnetically separate water-soluble dyes from solution.

sted, utgiver, år, opplag, sider
Stockholm: Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi , 2007. , s. 83
HSV kategori
Forskningsprogram
oorganisk kemi
Identifikatorer
URN: urn:nbn:se:su:diva-6584ISBN: 91-7155-368-1 (tryckt)OAI: oai:DiVA.org:su-6584DiVA, id: diva2:196694
Disputas
2007-02-23, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 13:00
Opponent
Veileder
Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26bibliografisk kontrollert
Delarbeid
1. Structural features and adsorption behaviour of mesoporous silica particles formed from droplets generated in a spraying chamber
Åpne denne publikasjonen i ny fane eller vindu >>Structural features and adsorption behaviour of mesoporous silica particles formed from droplets generated in a spraying chamber
2004 Inngår i: Microporous and Mesoporous Materials, ISSN 1387-1811, Vol. 72, nr 1-3, s. 175-183Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:su:diva-24073 (URN)
Merknad
Part of urn:nbn:se:su:diva-6584Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26bibliografisk kontrollert
2. Aerosol based synthesis of mesostructured particles using ammonia gas as a condensation promoter
Åpne denne publikasjonen i ny fane eller vindu >>Aerosol based synthesis of mesostructured particles using ammonia gas as a condensation promoter
Inngår i: Microporous and Mesoporous MaterialsArtikkel i tidsskrift (Fagfellevurdert) Submitted
Identifikatorer
urn:nbn:se:su:diva-24074 (URN)
Merknad
Part of urn:nbn:se:su:diva-6584Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26bibliografisk kontrollert
3. Combined Emulsion and Solvent Evaporation (ESE) Synthesis Route to Well-Ordered Mesoporous Materials
Åpne denne publikasjonen i ny fane eller vindu >>Combined Emulsion and Solvent Evaporation (ESE) Synthesis Route to Well-Ordered Mesoporous Materials
2007 Inngår i: Langmuir, ISSN 0743-7463, Vol. 23, nr 3, s. 1459-1464Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:su:diva-24075 (URN)
Merknad
Part of urn:nbn:se:su:diva-6584Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26bibliografisk kontrollert
4. Photochromic mesostructured silica pigments dispersed in latex films
Åpne denne publikasjonen i ny fane eller vindu >>Photochromic mesostructured silica pigments dispersed in latex films
Vise andre…
2005 Inngår i: Journal of Materials Chemistry, ISSN 0959-9428, Vol. 15, nr 34, s. 3507-3513Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:su:diva-24076 (URN)
Merknad
Part of urn:nbn:se:su:diva-6584Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26bibliografisk kontrollert
5. One-Pot Synthesis of Well-Ordered Mesoporous Magnetic Carriers
Åpne denne publikasjonen i ny fane eller vindu >>One-Pot Synthesis of Well-Ordered Mesoporous Magnetic Carriers
2007 (engelsk)Inngår i: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 17, s. 2700-2705Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The facile preparation of a mesoporous magnetic carrier technology is demonstrated. The micron-sized spherical mesostructured particles are prepared using a newly-developed, one-step, combined emulsion and solvent evaporation (ESE) method. The surfactant-templated silica matrix display a well-ordered internal pore architecture. Very limited pore blocking, and only to a limited degree disordered- or worm-like structures are observed, induced by the iron oxide nanoparticles added to provide the superparamagnetic properties.The iron oxide content was precisely controlled, and the magnetic properties were well preserved during the process. Finally we demonstrate the applicability of the magnetically separable mesoporous material as an adsorbent for specific dissolved materials from dilute aqueous solutions.

HSV kategori
Identifikatorer
urn:nbn:se:su:diva-24077 (URN)10.1039/B618502A (DOI)
Merknad
Part of urn:nbn:se:su:diva-6584Tilgjengelig fra: 2007-02-01 Laget: 2007-01-26 Sist oppdatert: 2017-12-13bibliografisk kontrollert

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