Sökning: "PBI"
Visar resultat 1 - 5 av 7 uppsatser innehållade ordet PBI.
1. Reprocessing and Characterization of Polybenzimidazole for High-Temperature Polymer Electrolyte Membrane Fuel Cells
Master-uppsats, Lunds universitet/Centrum för analys och syntesSammanfattning : A reprocessing method of poly(2,2’-(m-phenylene)-5,5’-bibenzimidazole) (PBI) membranes recovered from the production line of High-Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFC) at Blue World Technologies (BWT) has been developed in order to reduce material loss in the production. Redissolution of scrap PBI membranes in poly(phosphoric acid) (PPA) and phosphoric acid (PA) was successful and the subsequent washing procedure produced PBI that could be redissolved in N,N-dimethyl acetamide (DMAc) and suitable for solution casting of new membranes. LÄS MER
2. Characterisation of Ionic Liquid doped Polybenzimidazole Membranes for Application in High-Temperature Proton Exchange Membrane Fuel Cells
Master-uppsats, Lunds universitet/Kemiteknik (CI)Sammanfattning : In this study four membranes were tested and evaluated against each other for use in high-temperature proton exchange membrane fuel cell (HT-PEMFC) applications. A phosphoric acid (PA) doped polybenzimidazole (PBI) membrane, was used as a reference as the current state-of-the-art. LÄS MER
3. Optimization and Characterization of Luminescent Materials for the ESS Proton Beam Imaging System
M1-uppsats, Lunds universitet/Centrum för analys och syntesSammanfattning : Spallation sources such as European Spallation Source (ESS) produces neutrons by bombarding high-energy protons onto the target wheel. To determine the location of the proton beam a Proton Beam Imaging (PBI) system will be installed. LÄS MER
4. Iterative Reconstruction Algorithm for Phase-Contrast X-Ray Imaging
Kandidat-uppsats, KTH/Medicinteknik och hälsosystemSammanfattning : Phase-contrast imaging (PCI) is a modality of medical x-ray imaging that can solve one of the main limitations with conventional attenuation-based imaging: the imaging of materials with low attenuation coefficients, such as soft tissues. A modality of PCI, Propagation-based phase-contrast imaging (PBI), was used in this project. LÄS MER
5. HUMINT - En begreppsanalys
Kandidat-uppsats, Krigsvetenskapliga avdelningen (KVA)Sammanfattning : Under det senaste 10-15 åren finns ett ökande inslag av särskilda förband och enheter för inhämtning av information och underrättelser från mänskliga källor i de insatsområden som Sverige skickar trupp till. Dessa förband kan vara av typen Field Humint Teams (FHT) eller National Intelligence Cells (NIC). LÄS MER