Sökning: "SBA-15."

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet SBA-15..

  1. 1. Mesoporous Silica SBA-15 - Formation, Modification and Application

    Författare :Tomas Kjellman; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SBA-15; Mesoporous Silica; Intrawall pores; Colloidal Stability; Drug release; Deposition;

    Sammanfattning : Several aspects related to the mesoporous silica material SBA-15 have been studied through the use of a wide range of experimental techniques, including low voltage high-resolution scanning electron microscopy, small angle X-ray scattering and nitrogen sorption. This work contains three parts, which are in many ways overlapping. LÄS MER

  3. 2. Towards a responsive functional material: Modification of porosity and grafting of poly(N-isopropylacrylamide) in mesoporous silica SBA-15

    Författare :Nina Reichhardt; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mesoporous silica; SBA-15; intrawall pores; PNIPAAM; lower critical solution temperature; water sorption calorimetry; gas sorption;

    Sammanfattning : Mesoporous silica materials, such as SBA-15, have potential as biocompatible carriers for pharmaceutical applications as well as mini-reactors in e.g. catalysis. This potential arises from their well-defined porous structure on the nanometre scale accompanied by a high internal surface area (800 - 1000 m2/g). LÄS MER

  4. 3. Formation of mesoporous SBA-15 from a colloidal perspective

    Författare :Peter Linton; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The formation of the hexagonal ordered mesoporous SBA-15 material has been invetsigated. The evolution from free spherical micelles into an ordered material was studied with time-resolved in-situ SAXS, USAXS and SANS measurements. Both the mesoscopic region and the colloidal region were monitored. LÄS MER

  5. 4. Mesoporous Silica Particles for a Potential Therapeutic Application

    Författare :Muhammad Naeem Iqbal; Niklas Hedin; Tore Bengtsson; Mirva Eriksson; Jessica Rosenholm; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mesoporous silica; SBA-15; amylase; lipase; electron microscope; adsorption; type 2 diabetes; materialkemi; Materials Chemistry;

    Sammanfattning : Mesoporous silica particles (MSPs) have a high surface area, pore volume, and tunable pore size and surface properties, which makes them ideal for advanced therapeutic, biocatalytic, separation, and drug delivery applications. The work in this thesis shows that MSPs can be employed for therapeutic applications with minimal risk of adverse consequences. LÄS MER

  7. 5. Mesoporous Silica Formed with Triblock Copolymers

    Författare :Katarina Flodström; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysikalisk kemi; 1H NMR; TEM; SAXS; in situ; mechanism of formation; cubic Ia3d; cubic Im3m; Mesoporous; synthesis; Pluronic; SBA-16; SBA-15; hexagonal p6mm; synchrotron SAXS; Physical chemistry; amphiphilic polymers; silica;

    Sammanfattning : The formation of highly ordered mesoporous silica materials, using PEO-PPO-PEO amphiphilic triblock copolymers (so-called Pluronics) as structure directing agents, has been studied. The materials are formed through the addition of a silica source to a polymer solution of low concentration (2.5 wt ) under acidic conditions. LÄS MER