Sökning: "Silica fibres"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Silica fibres.

1. 1. Polyelectrolyte adsorption on oppositely charged surfaces - Conformation and adsorption kinetics

   Författare :Lars-Erik Enarsson; Lars Wågberg; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polyelectrolyte adsorption; adsorption kinetics; adsorption isotherms; conformation; bridging; stagnation point adsorption reflectometry; quartz crystal microgravimetry; polyelectrolyte titration; cationic polyacrylamide; cationic dextran; colloidal silica; silica surfaces; pulp; Chemistry; Kemi;

   Sammanfattning : Denna avhandling presenterar experimentella studier av polyelektrolytadsorption på motsatt laddade ytor, där substrat av både kiseloxid och blekt barrsulfatmassa har använts. Ett huvudsakligt syfte med denna forskning var att karaktärisera konformationen hos adsorberade skikt av katjonisk polyakrylamid (CPAM) i jämförelse med katjonisk dextran (Cdextran) och relatera denna information till inbindningskapaciteten av kolloidal kiselsyra. LÄS MER

3. 2. Biofoams and Biocomposites based on Wheat Gluten Proteins

   Författare :Qiong Wu; Mikael Hedenqvist; Richard Olsson; Hélène Angellier-Coussy; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wheat gluten; biofoam; biocomposite; freeze-drying; flame-retardant; silica; antimicrobial; bimodal; conductive biofoam; flax fiber; crack-resistance; Kemi; Chemistry;

   Sammanfattning : Novel uses of wheat gluten (WG) proteins, obtained e.g. as a coproduct from bio-ethanol production, are presented in this thesis. A flame-retardant foam was prepared via in-situ polymerization of hydrolyzed tetraethyl orthosilicate (TEOS) in a denatured WG matrix (Paper I). LÄS MER

4. 3. Novel Chromatography Matrices for Fast Isolation of Plasmid DNA

   Författare :Peter Tiainen; Tillämpad biokemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biokemisk teknik; Polymer technology; biopolymers; Polymerteknik; Biotechnology; Bioteknik; Biochemical technology; Plasmid recovery.; Composite materials; Kompositmaterial; Coating and surface treatment; Skikt och ytbehandling; Superporous agarose; Silica fibres; Plasmid purification; Anion-exchange matrices;

   Sammanfattning : As new therapeutic areas in which genetic material is employed, i.e. gene therapy and DNA vaccination, are expanding, a substantial increase in the demand for gene vectors, e.g. LÄS MER

5. 4. Adsorption kinetics of cationic polyacrylamides on cellulose fibres and its influence on fibre flocculation

   Författare :Daniel Solberg; KTH; []
   Nyckelord :Adsorption; bridging; cationic polymers; cellulose fibres; electrosteric stabilisation flocculation; ;

   Sammanfattning : The adsorption of cationic polyacrylamide (C-PAM) and silicananoparticles onto a model surface of silicon oxide wascompared with the adsorption of C-PAM to fibres and theirinfluence on flocculation of a fibre suspension. An increase inionic strength affects the polyelectrolyte adsorption indifferent ways for these two systems. LÄS MER

7. 5. Experimental investigation of energy transfer upconversion in densely Er+ doped silica fibres

   Författare :Dan Bremberg; KTH; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER