A5080665138- Fuel Cells and Related Materials
- Membrane-based Ion Separation Techniques
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
- Membrane Separation and Gas Transport
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Advanced battery technologies research
- Synthesis and properties of polymers
- Crystallization and Solubility Studies
- Molecular Sensors and Ion Detection
- Polymer composites and self-healing
- Membrane Separation Technologies
- Carbon dioxide utilization in catalysis
- Asymmetric Synthesis and Catalysis
- Chemistry and Chemical Engineering
- Covalent Organic Framework Applications
- X-ray Diffraction in Crystallography
- Oxidative Organic Chemistry Reactions
- Advancements in Solid Oxide Fuel Cells
- Synthetic Organic Chemistry Methods
Virginia Tech
2012-2021
University of Freiburg
2016-2021
Interface (United States)
2016
Structure-property-performance relationships of disulfonated poly(arylene ether sulfone) multiblock copolymer membranes were investigated for their use in direct methanol fuel cell (DMFC) applications. Multiple series reactive polysulfone, polyketone, and polynitrile hydrophobic block segments having different lengths molecular composition synthesized reacted with a hydrophilic segment by coupling reaction. Large-scale morphological order the copolymers evolved increase size that gave...
Abstract Hydrophobic‐hydrophilic sequence multiblock copolymers, based on alternating segments of phenoxide terminated fully disulfonated poly(arylene ether sulfone) (BPS100) and fluorine‐terminated (6FBPS0) were synthesized evaluated for application as proton exchange membranes. By utilizing mild reaction conditions the ether–ether interchange reactions minimized, preventing randomization copolymers. Tough, ductile, transparent membranes solution cast from block copolymers characterized...
Increasing hydrophobicity multiblock copolymers were synthesized by altering the copolymer composition of hydrophobic segments. A series nitrile-containing oligomers consisting bisphenol (Bis A), dimethylbisphenol (DMBPA), and tetramethylbisphenol (TMBPA) moieties reacted with a disulfonated poly (arylene ether sulfone) hydrophilic segment to form series. 1H 19F NMR spectroscopy used monitor progress copolymerization reactions confirm desired compositions. Membranes cast from resultant had...
The primary focus of this work is evaluation, modeling, and comparison fuel cell properties for a sulfonated aromatic hydrocarbon polymer membrane under operations against the standard commercial Nafion membrane. Membrane characterization transport were reported. performance, current distribution mapping, water balance measurements both also examined at different humidity conditions. studies show that high RH, gives better performance with less flooding when compared Nafion. However low...
UV-crosslinkable ketone containing PPO copolymers show increased gas selectivity, with transport properties and crosslinking density dependent on content.
Combinations of dienes and dienophiles were examined in order to elicit possible combinations for thermoreversible crosslinking units. Comparison experimental results quantum calculations indicated that reaction kinetics activation energy much better prediction factors than change enthalpy the successful cycloaddition. Further testing on diene–dienophile pairs underwent cycloaddition determined feasibility thermoreversibility/retro-reaction each Diels–Alder compounds. Heating compounds...
Abstract A series of fused dihydrodibenzobarrelene (dibenzobicyclo[2.2.2]octadiene) and lactone rings were prepared from dialkyl fumarates 9‐anthracenemethanol. These products via a one‐pot synthesis in which Diels‐Alder reaction occurred followed by an intramolecular transesterification to form the ring. key feature this synthetic methodology is straightforward purification products, most cases without need for chromatography. The ease work‐up along with simple setup (no catalysts or other...
Abstract not Available.