Sökning: "steric force"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden steric force.

  1. 1. Steric Stabilization of Polylactide particles achieved by Covalent 'grafting-from' with Hydrophilic Polymers

    Författare :Robertus Wahyu Nayan Nugroho; Ann-Christine Albertsson; Karin Odelius; Anders Höglund; Mark Rutland; Martina Janstål; KTH; []
    Nyckelord :Steric stabilization; AFM; hydrophilicity; surface modification; poly lactide ; acrylamide; acrylic acid; maleic anhydride;

    Sammanfattning : Despite numerous advantages of using particles in a wide range of applications, they have one drawback that is their tendency to agglomerate. One way to overcome this problem is to sterically  stabilize the particles by introducing polymeric  chains covalently attached to the surface. LÄS MER

  3. 2. Modification of polymeric particles via surface grafting for 3D scaffold design

    Författare :Robertus Wahyu Nayan Nugroho; Ann-Christine Albertsson; Orlando J. Rojas; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; surface grafting; PLA; PLLA; hydrophilic polymers; particles; geometry; steric stabilization; atomic force microscopy AFM ; polyelectrolyte multilayers; 3D scaffold; bone tissue engineering; surface degradation;

    Sammanfattning : Surface modification techniques have played important roles in various aspects of modern technology. They have been employed to improve substrates by altering surface physicochemical properties. LÄS MER

  4. 3. Surface characterization and manipulation of polyampholytic hydrogel coatings

    Författare :Feng-I Tai; Thomas Ederth; Bo Liedberg; Lei Ye; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrogels; antifouling; charge-balanced material; polyampholytes; force measurements; polymer swelling; protein adsorption; patterning; plasmonics;

    Sammanfattning : This thesis is dedicated to building up fundamental knowledge about polyampholytic hydrogels, which are developed in our group for anti-fouling purposes. Charge-balanced polymers, where positive and negative charges balance each other, have emerged as interesting candidates for many applications in materials science. LÄS MER

  5. 4. A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties

    Författare :Jeanette Ulama; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; colloidal model system; steric stabilization; core-shell; poly ethylene glycol PEG ; heptafluorobutyl methactylate HFBMA ; fluorinated; polymer; phase behavior; short-range attractions; semi-batch emulsion polymerization; small angle X-ray scattering SAXS ; smearing effects; dynamic light scattering DLS ; cryogenic-transmission electron microscopy cryo-TEM ;

    Sammanfattning : Model systems have expanded our knowledge of numerous phenomena in Colloid Science, such as the appearance of glasses, order-disorder transitions involving crystals and attraction induced formation of gels. So far, the existing colloidal model systems have been limited mainly to nonaqueous media. LÄS MER

  7. 5. On the interactions in cellulose systems : surface forces and adsorption

    Författare :Monika Österberg; KTH; []
    Nyckelord :cellulose; hemicellulose; xylan; lignin; surface forces; adsorption; polyelectrolyte; SFA; AFM; ESCA; Langmuir-Blodgett films; chitosan; steric forces; bridging; adhesion;

    Sammanfattning : In this thesis the interactions in cellulose systems havebeen studied with emphasis on surface forces and adsorptionphenomenon. The study was limited to surfaces and polymers ofinterest for papermaking. LÄS MER