Sökning: "colloidal chemistry"

Visar resultat 16 - 20 av 151 avhandlingar innehållade orden colloidal chemistry.

1. 16. Interaction Between Microgels and Oppositely Charged Proteins

   Författare :Christian Johansson; Per Hansson; Brian Saunders; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; microgel; protein; uptake; distribution; core-shell; colloidal stability; Physical chemistry; Fysikalisk kemi; Physical Chemistry; fysikalisk kemi;

   Sammanfattning : This thesis reports on interactions between microgels and oppositely charged proteins. Two types of negatively charged microgels are investigated: poly(acrylic acid) microgels of 60-80 µm in diameter, and colloidal poly(NIPAM-co-acrylic acid) microgels of around 1 µm in diameter. LÄS MER

3. 17. Nano-segregated soft materials observed by NMR spectroscopy

   Författare :Anton Frise; István Furó; Monika Schönhoff; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nuclear magnetic resonance; soft matter; colloidal dispersion; carbon nanotubes; colloidal silica; adsorption; liquid crystals; ionic liquids; diffusion; Physical chemistry; Fysikalisk kemi;

   Sammanfattning : This thesis is about using nuclear magnetic resonance (NMR) spectroscopy for studying soft materials. Soft materials may be encountered everyday by most readers of this thesis, for example when taking a shower or watching TV. The usefulness of these materials originates from them being soft yet, at the same time, having some kind of a structure. LÄS MER

4. 18. Molecular Exchange in Colloidal Dispersions

   Författare :Alex Evilevitch; Kemiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; charged micoremulsion droplets; kinetics; mechanism.; Physical chemistry; Fysikalisk kemi; molecular transport; cell model; infinite dilution limit; turbidity measurements; oil solubilization; computer simulation; modeling; monomer diffusion; molecular exchange; Microemulsion droplets; oil droplets;

   Sammanfattning : This thesis is a study of molecular exchange between the aggregates in a colloidal dispersion. The problem of oil molecular transport at resolubilization of big oil drops by smaller microemulsion droplets is considered as an experimental model system. LÄS MER

5. 19. Cellulose nanofibril materials with controlled structure : the influence of colloidal interactions

   Författare :Andreas Fall; Lars Wågberg; Anna Finne Wistrand; Paul Gatenholm; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Colloidal stability; cellulose nanofibrils; nanofibers; nanostructured materials; biocomposite; DLVO; gel;

   Sammanfattning : Nanoparticles are very interesting components. Due to their very large specific surface area they possess properties in between molecules and macroscopic materials. In addition, a material built up of hierarchically assembled nanoparticles could obtain unique properties, not possessed by the nanoparticles themself. LÄS MER

7. 20. Charged Polymers: From DNA to Polyampholytes

   Författare :Malek O Khan; Beräkningskemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; computational steering; DNA condensation; ion correlations; electrostatic interactions; colloidal stability; polyampholytes; Monte Carlo simulations; polyelectrolytes; Theoretical chemistry; quantum chemistry; Teoretisk kemi; kvantkemi;

   Sammanfattning : Three main themes are outlined in this thesis: Polyelectrolytes/DNA : In a living cell, DNA molecules have a compact conformation in order to fit in, while in a test tube they will take on an expanded cylindrical shape, due to the negative phosphate groups along the DNA molecule. With the help of computer simulations it has been shown that like-charged monomers of a poly- electrolyte can attract each other if the counterions are taken into account. LÄS MER