Search for dissertations about: "inorganic silica"

Showing result 1 - 5 of 66 swedish dissertations containing the words inorganic silica.

2. 1. Colloidal suspensions of mesostructured silica

   Author : Andreas Berggren; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; formation mechanism; non-ionic surfactants; silica; inorganic silica; colloidal suspension; control of particle size;

   Abstract : Mesoporous silica is a porous material with walls made of silica and pores in the size range of 2-50 nm. Since the silica most often is amorphous, the material lacks short range order but the pores may be arranged in different structures generating a long-range order. READ MORE

4. 2. Synthesis and Characterization of Functionalized Silica Mesoporous Crystals : Cationic Surfactant and Co-structure Directing Agent System

   Author : Lu Han; Osamu Terasaki; Viveka Alfredsson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mesoporous silica; Template synthesis; Functionalization; Electron microscopy; Defects; Crystal growth; Catalysis; Inorganic chemistry; Oorganisk kemi; Structural Chemistry; strukturkemi;

   Abstract : This dissertation has been focused on the synthesis and characterization of novel functionalized silica mesoporous crystals by using cationic surfactant and co–structure directing agents (CSDA), the central concept of the synthesis method is to build proper organic/inorganic interactions by introducing CSDA into the synthesis system. By using cationic surfactant as template and anionic CSDA, carboxylic group functionalized mesoporous silicas were successfully synthesized. READ MORE

5. 3. Dissolving the Rocks : Solubility Enhancement of Active Pharmaceutical Ingredients using Mesoporous Silica

   Author : Xin Xia; Alfonso E. Garcia-Bennett; Xiaodong Zou; Göran Frenning; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; mesoporous silica; drug delivery; solubility enhancement; active pharmaceutical ingredients; oral toxicity; confinement; crystallization; pharmaceutical excipients; bioavailability; Inorganic Chemistry; oorganisk kemi;

   Abstract : Poor aqueous solubility is one of the greatest barriers for new drug candidates to enter toxicology studies, let alone clinical trials. This thesis focuses on contributing to solving this problem, evaluating the oral toxicity of mesoporous silica particles, and enhancing the apparent solubility and bioavailability of active pharmaceutical ingredients in vitro and in vivo using mesoporous silica particles. READ MORE

6. 4. Development of syntheses for nanostructured titania and silica

   Author : Gunnar Örn Simonarson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lithium intercalation; nanoparticles; X-ray characterization; mesoporous silica; mesoporous titania; spray deposition; Titanium dioxide;

   Abstract : Nanostructured titania is of great interest for a variety of energy and environmental applications, including conversion of solar energy, for energy storage systems and removal of organic pollutants in water and air. Titania is composed of earth abundant elements, it is environmentally friendly and chemically stable which makes it an attractive material to utilize. READ MORE

7. 5. Formation of mesostructured silica based on non-ionic interactions

   Author : Andreas Sundblom; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mesoporous silica; non-ionic block co-polymer; SBA-15.; colloidal suspension; silica-PEO interaction; formation mechanism; inorganic silica;

   Abstract : Mesostructured silica is a material consisting of a silica matrix with an organization in the meso range of 2-50 nm. The silica matrix is most often amorphous while the organization, induced by a structure directing agent, may generate a long-range mesoorder. READ MORE