Search for dissertations about: "ESCA"

Showing result 1 - 5 of 47 swedish dissertations containing the word ESCA.

  1. 1. Phase Transformations in Solid Pharmaceutical Materials Studied by AFM, ESCA, DSC and SAXS

    Author : Denny Mahlin; Göran Alderborn; Sven Engström; Duncan Q M Craig; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; polymer; lipid; lactose; phase transformation; phase formation; crystallisation; AFM; X-ray diffraction; ESCA; DSC; solid dispersion; Fysikalisk kemi; Physical chemistry; Fysikalisk kemi;

    Abstract : Mixing excipients is a common way to produce pharmaceutical materials with suitable properties for drug formulation. An understanding of the basic mechanisms involved in the formation and transformation of the structures of solid state mixtures is crucial if one is to be able to produce materials with the desired properties in a reliable way. READ MORE

  2. 2. Passivation of Austenitic Stainless Steel

    Author : Lena Wegrelius; Chalmers University of Technology; []
    Keywords : stainless steel; chloride; molybdenum; passivation; hydrochloric acid; nitrogen; ESCA; dissolution;

    Abstract : The objective of this thesis is to study the corrosion resistance and passivation of high alloyed austenitic stainless steels exposed to hydrochloric acid. The introductory section gives a background to the subject; electrochemical measurements and surface analysis by the ESCA-technique (Electron Spectroscopy for Chemical Analysis). READ MORE

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

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

    Abstract : 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. READ MORE

  4. 4. Silicone biomaterials obtained by plasma treatment and subsequent surface hydrosilylation

    Author : Björn Olander; KTH; []
    Keywords : Silicone elastomers; PDMS; XPS; ESCA; surface modification; plasma;

    Abstract : The need for safe and functional implants has led to anincreased demand for improved biomaterials. The performance invivo depends on the interaction between the biologicalsurrounding and the surface of the material. READ MORE

  5. 5. Aqueous Processing of WC-Co Powders Aqueous processing of WC-Co powders

    Author : Karin Andersson; KTH; []
    Keywords : Hard metal; cemented carbide; WC-Co; tungsten oxide; tungsten carbide; oxidation; cobalt; dissolution; surface complexation; XPS; AFM; colloidal probe; force curve; Hamaker constant; Cauchy; WO3; CoOOH; CoO; Co3O4; ESCA; zeta-potential; surface poten;

    Abstract : The object of this work is toobtain a fundamental understanding of the principal issuesconcerning the handling of WC-Co powders, in an aqueousmedium.The oxidation and dissolution oftungsten carbide powder dispersed in water was investigatedusing X-ray Photoelectron Spectroscopy (XPS) and leachingstudies. READ MORE