Sökning: "Ionomers"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet Ionomers.

  1. 1. Proton-Conducting Sulfonated Aromatic Ionomers and Membranes by Chemical Modifications and Polycondensations

    Författare :Elin Persson Jutemar; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Proton conductivity; Proton-exchange membrane fuel cells; Sulfonated polymer electrolytes; Sulfonated monomers; X-ray scattering; Sulfonation; Polymer electrolytes; Ionomers; Polycondensation; Polyaromatics;

    Sammanfattning : Proton-exchange membrane fuel cells (PEMFC)s are increasingly regarded as promising environmentally benign power sources. Intensive development is today directed towards reducing the cost and increasing the durability of the fuel cell, as well as expanding the operational window for the PEMFC for a range of applications. LÄS MER

  3. 2. Functional Cyclic Carbonate Monomers and Polycarbonates : Synthesis and Biomaterials Applications

    Författare :Jonas Mindemark; Tim Bowden; Andrew Dove; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; DNA condensation; gene delivery; ionomers; polyplexes; self-assembly; amphiphiles; biodegradable; biological applications of polymers; transfection; cyclic carbonate monomers; polycarbonates; semicrystalline polymers; click chemistry; triazoles; cycloaddition; Kemi med inriktning mot polymerkemi; Chemistry with specialization in Polymer Chemistry;

    Sammanfattning : The present work describes a selection of strategies for the synthesis of functional aliphatic polycarbonates. Using an end-group functionalization strategy, a series of DNA-binding cationic poly(trimethylene carbonate)s was synthesized for application as vectors for non-viral gene delivery. LÄS MER

  4. 3. Durable Polysulfones with Densely Sulfonated Segments for Highly Proton Conducting Membranes

    Författare :Shogo Takamuku; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer electrolytes; sulfonations; polycondensation; polyaromatics; ionomers; sulfonated monomers; block copolymers; segmented copolymers; sequenced copolymers; poly arylene ether sulfone s; lithiations; sulfinations; metalations; phase-separation; highly sulfonations; macromonomers; blocky structures;

    Sammanfattning : Fuel cells are considered as a promising alternative environmentally benign power source to the existing ones depending on petroleum oil. Especially, proton-exchange membrane fuel cells (PEMFCs) have been intensively developed during the last decade because of their wide application windows including various portable, stationary and transportation applications. LÄS MER

  5. 4. Membrane Electrode Assemblies Based on Hydrocarbon Ionomers and New Catalyst Supports for PEM Fuel Cells

    Författare :Sophie von Kraemer; Göran Lindbergh; Antonino Aricò; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Catalyst support; Carbon; High Temperature Proton Exchange Membrane Fuel Cell; Hydrocarbon Ionomer; Membrane Electrode Assembly; Nafion; PEFC; PEMFC; Porous Electrode; Sulfonated Polysulfone; Titanium Dioxide; Chemical engineering; Kemiteknik;

    Sammanfattning : The proton exchange membrane fuel cell (PEMFC) is a potential electrochemicalpower device for vehicles, auxiliary power units and small-scale power plants. In themembrane electrode assembly (MEA), which is the core of the PEMFC single cell,oxygen in air and hydrogen electrochemically react on separate sides of a membraneand electrical energy is generated. LÄS MER

  7. 5. Tailoring of Biomaterials using Ionic Interactions : Synthesis, Characterization and Application

    Författare :Björn Atthoff; Jöns Hilborn; Tim Bowden; Mats Andersson; Uppsala universitet; []
    Nyckelord :Chemistry; biodegradable polymers; ionomer; water uptake; protein delivery; protein adsorption; protein membrane; cell seeding efficiency; amphiphillic; inner structure; polarized membrane; Kemi;

    Sammanfattning : The interactions between polymers and components of biological systems are an important area of interest within the fields of tissue engineering, polymer chemistry, medicine and biomaterials. In order to create such a biomimetic material, it must show the inherent ability to reproduce or elicit a biological function. LÄS MER