Sökning: "ytmodifiering"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet ytmodifiering.

  1. 1. Polyethylene – metal oxide particle nanocomposites for future HVDC cable insulation : From interface tailoring to designed performance

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Dongming Liu; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HVDC; electrical insulation; core-shell nanoparticles; surface modification; silane chemistry; nanocomposites; polyethylene; adsorption; long-term stability; interface; particle dispersion; cavitation; conductivity; HVDC; elektrisk isolation; ytmodifiering; silankemi; nanokompositer; polyeten; adsorption; långtidsstabilitet; ytskikt; partikeldispergering; kavitation; ledningsförmåga; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Low-density polyethylene (LDPE) nanocomposites containing metal oxide nanoparticles are considered as promising candidates for insulating materials in future high-voltage direct-current (HVDC) cables. The significant improvement in dielectric properties compared with unfilled polymer is attributed to the large and active interface between the nanoparticles and the polymer. LÄS MER

  2. 2. Surface modification approaches of cellulose nanofibrils and their effect on dispersibility

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Tahani Kaldéus; KTH.; KTH.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose nanofibrils; colloidal stability; re dispersibility; surface modification; bio-nanocomposites; interface; cellulosa nanofibriller; kolloidal stabilitet; re dispergerbarhet; ytmodifiering; bio-nanokompositer; gränssnitt; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : In the strive to find and develop sustainable bio-based materials an increased interest for nanocellulosic materials as attractive alternatives has arisen during the past decades. This can be attributed to their abundant renewability, remarkable inherent mechanical properties and their capability to be chemically modified. LÄS MER

  3. 3. Experimental Studies on CO2 Capture Using Absorbent in a Polypropylene Hollow Fiber Membrane Contactor

    Detta är en avhandling från Västerås : Mälardalen University

    Författare :Yuexia Lu; Mälardalens högskola.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO2 capture; Simultaneous removal of CO2 and SO2; Hollow fiber membrane contactor; Membrane gas absorption; Partial wetting; Surface modification; CO2-avskiljning; samtidig avskiljning av CO2 och SO2; ihålig fiber; membran; gas absorption; vätning; ytmodifiering; Energy- and Environmental Engineering; energi- och miljöteknik;

    Sammanfattning : In recent years, membrane gas absorption technology has been considered as one of the promising alternatives to conventional techniques for CO2 capture due to its favorable mass transfer performance. As a hybrid approach of chemical absorption and membrane separation, it exhibits a number of advantages, such as operational flexibility, compact structure, high surface-area-to-volume ratio, linear scale up, modularity and predictable performance. LÄS MER

  4. 4. OSTE Microfluidic Technologies for Cell Encapsulation and Biomolecular Analysis

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Xiamo Zhou; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microfluidics; microfabrication; cell encapsulation; core-shell particle; microparticle synthesis; off-stoichiometry-thiol-ene; OSTE; OSTE ; lab-on-a-chip; surface modification; core-shell particle co-synthesis; microar- ray; micromixer; bonding; surface modification; droplet microfluidics; protein screening.; Mikrofluidik; mikrofabrikation; cellinkapsling; cores-shell kap- sel; mikrokapselsyntes; lab-on-chip; ickestökiometrisk tiol-en; OSTE; OSTE ; ytmodifiering; samtidig syntes av core-shellkapslar; mikroarray; mikromixer; sammanfogning; dropletmikrofluidik; proteindetektion.; Applied Medical Technology; Tillämpad medicinsk teknik;

    Sammanfattning : In novel drug delivery system, the encapsulation of therapeutic cells in microparticles has great promises for the treatment of a range of health con- ditions. Therefore, the encapsulation material and technology are of great importance to the validity and efficiency of the advanced medical therapy. LÄS MER

  5. 5. Covalent Surface Modification of Degradable Polymers for Increased Biocompatibility

    Detta är en avhandling från Stockholm : KTH

    Författare :Martina Källrot; KTH.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Vapor phase grafting; covalent surface modification; solvent free; nano patterned topography; degradable polymers; poly ε-caprolactone ; poly L-lactide ; poly lactide-co-glycolide ; poly trimethylene carbonate ; N-vinylpyrrolidone; maleic anhydride; acrylamide; Gasfasympning; kovalent ytmodifiering; lösningsmedelsfri; nedbrytbara polymerer; nanomönstrad topografi; poly L-laktid ; poly ε-kaprolakton ; poly laktid-co-glykolid ; poly trimetylen karbonat ; N-vinylpyrrolidon; maleinsyraanhydrid; akrylamid; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi;

    Sammanfattning : Degradable polymers have gained an increased attention in the field of biomedical applications over the past decades, for example in tissue engineering. One way of improving the biocompatibility of these polymers is by chemical surface modification, however the risk of degradation during the modification procedure is a limiting factor. LÄS MER