Sökning: "Polyelectrolyte Solutions"

Visar resultat 1 - 5 av 26 avhandlingar innehållade orden Polyelectrolyte Solutions.

  1. 1. Polyelectrolyte Complexes : Their Characterization and use for Modification of Wood Fibre Surfaces

    Författare :Linda Gärdlund; Lars Wågberg; Robert Pelton; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose and paper engineering; Cellulosa- och pappersteknik; Cellulosa- och pappersteknik; Chemical engineering;

    Sammanfattning : For economical reasons filler particles and less expensive fibre raw materials are more frequently used in papermaking. This influences the mechanical properties of the formed papers in a negative way and it is therefore necessary to add strength-enhancing agents to the papermaking furnish. LÄS MER

  3. 2. Polyelectrolytes : Bottle-Brush Architectures and Association with Surfactants

    Författare :Ali Naderi; Per M. Claesson; Orlando Rojas; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polyelectrolyte; Surfactant; Bottle-Brush Polyelectrolyte; Comb Polyelectrolyte; Non-Equilibrium State; Polymer Architecture; Adsorption; Desorption; Association; Excluded Volume; Light Scattering; SFA; AFM; QCM-D; Turbidimeter; Mica; Silica; Surface Forces; Surface and colloid chemistry; Yt- och kolloidkemi;

    Sammanfattning : This thesis has the dual purpose of raising awareness of the importance of the mixing protocol on the end products of polyelectrolyte-oppositely charged surfactant systems, and to contribute to a better understanding of the properties of bottle-brush polyelectrolytes when adsorbed onto interfaces. In the first part of this thesis work, the effects of the mixing protocol and the mixing procedure on formed polyelectrolyte-oppositely charged surfactant aggregates were investigated. LÄS MER

  4. 3. Structure and Phase Stability of Polyelectrolyte-Macroion Solutions

    Författare :Marie Skepö; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Fysikalisk kemi; hydrophobicity; spatially distributed interaction sites; protein-polymer interaction; Monte Carlo Simulations; redissolution; phase separation; cluster; complex; Polyelectrolytes; macroions;

    Sammanfattning : Polyelectrolytes are polymers bearing ionisable groups, which, in polar solvents, can dissociate into charged polymer chains (polyelectrolytes) and small counterions. In aqueous solutions, polyelectrolytes interact strongly with other macroions and in particular they tend to associate with objects of opposite charge and form complexes. LÄS MER

  5. 4. Phase Phenomena in Polymer Networks : Empirical Studies on the Influence of Hydrophobicity, Charge Density and Crosslinks on Macroion-Induced Phase Transitions in Polyelectrolyte Gels

    Författare :Martin Andersson; Per Hansson; Lennart Piculell; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Gel; microgel; microsphere; polystyrenesulfonate; polyacrylate; polyacrylicacid; DoTAB; DoTAC; CTAB; CTAC; network; polyelectrolyte; complex salt; self assembly; phase behaviour; hysteresis; thermodynamic; core-shell; lysozyme; cytochrome c; microscopy; micromanipulator; elastomer; elastic; protein; surfactant; phase behaviour; sorting; PHARMACY; FARMACI; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The thesis concerns polyelectrolyte gels in contact with oppositely charged proteins and surfactant micelles, and includes of four papers (I-IV). In paper I confocal Raman spectroscopy was introduced as a method to trace micelles and investigate the structure of gel-surfactant complexes, in phase separated gel spheres. LÄS MER

  7. 5. Polyelectrolyte Brush Electrodes for Protein Capture and Release

    Författare :Gustav Ferrand-Drake Del Castillo; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pH-responsive interfaces; Polyelectrolyte brushes; protein immobilization; electrochemistry.;

    Sammanfattning : Stimuli-responsive polyelectrolyte brushes switch as a function of pH between a charged and neutral state that affects their electrostatic interactions with other charged molecules like proteins. Adjustment of the pH results in the binding of large quantities of proteins making polyelectrolyte brushes widely used as biointerfaces. LÄS MER