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Showing result 1 - 5 of 9 swedish dissertations matching the above criteria.

  2. 1. Polyelectrolyte complexes : their preparation, adsorption behaviour and effect on paper properties

    Author : Caroline Ankerfors; Lars Wågberg; Monica Ek; Tom Lindström; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Abstract : In this work, the formation of polyelectrolyte complexes (PECs) has been studied using a jet mixing method not previously used for mixing polyelectrolytes. The PECs were formed from two weak polyelectrolytes, i.e. READ MORE

  4. 2. Polyelectrolyte complexes : Preparation, characterization, and use for control of wet and dry adhesion between surfaces

    Author : Caroline Ankerfors; Lars Wågberg; Regine von Klitzing; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis examines polyelectrolyte complex (PEC) preparation, adsorption behaviour, and potential use for control of wet and dry adhesion between surfaces. PEC formation was studied using a jet-mixing method not previously used for mixing polyelectrolytes. READ MORE

  5. 3. The effects of cellulosic fiber charges on polyelectrolyte adsorption and fiber-fiber interactions

    Author : A. Elisabet Horvath; Lars Wågberg; Stefan Zauscher; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adsorption; electrolyte; polyelectrolyte; polyelectrolyte titration; stoichiometry; fluorescence; CLSM; carboxymethylation; ESCA; charge ration; colloidal interactions; mechanical forces; network strength; floc; CPM; rehometer; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Abstract : The surface charges of cellulosic fibers contribute to several papermaking operations that influence the manufacture and final properties of paper. This thesis investigates the effect of the surface charges on wet-end chemistry, e.g. READ MORE

  6. 4. Polyelectrolyte adsorption on oppositely charged surfaces - Conformation and adsorption kinetics

    Author : Lars-Erik Enarsson; Lars Wågberg; KTH; []
    Keywords : 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;

    Abstract : 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. READ MORE

  7. 5. Appropriate conditions for polyelectrolyte titration to determine the charge of cellulosic fibers

    Author : Elisabet Horvath; KTH; []
    Keywords : adsorption; electrolyte; polyelectrolyte; ;

    Abstract : The polyelectrolyte titration method has been developed overthe years in order to determine the surface charge ofcellulosic fibers. The conditions have been varied depending onthe author. READ MORE