A5034790348- Advanced Cellulose Research Studies
- Block Copolymer Self-Assembly
- Polymer composites and self-healing
- Advanced Sensor and Energy Harvesting Materials
- biodegradable polymer synthesis and properties
- Supercapacitor Materials and Fabrication
- Electrospun Nanofibers in Biomedical Applications
- Synthetic Organic Chemistry Methods
- Theoretical and Computational Physics
- Covalent Organic Framework Applications
- Quasicrystal Structures and Properties
- Risk and Safety Analysis
- Occupational Health and Safety Research
- Chemical Safety and Risk Management
- Nanocomposite Films for Food Packaging
- Dielectric materials and actuators
University of Chicago
2020-2021
University of Minnesota
2017
Small angle x-ray scattering experiments on three model low molar mass diblock copolymer systems containing minority polylactide and majority hydrocarbon blocks demonstrate that conformational asymmetry stabilizes the Frank-Kasper σ phase. Differences in block flexibility compete with space filling at constant density inducing formation of polyhedral shaped particles assemble into this symmetry ordered state local tetrahedral coordination. These results confirm predictions from...
Dynamic covalent networks comprised of tunable thia-Michael bonds result in phase separated with tailorable mechanical and adaptive properties.
Mechanically robust, thermoresponsive, ion-conducting nanocomposite films are prepared from poly(2-phenylethyl methacrylate)-grafted cellulose nanocrystals (MxG-CNC-g-PPMA). One-component of the polymer-grafted nanoparticle (PGN) MxG-CNC-g-PPMA imbibed with 30 wt % imidazolium-based ionic liquid to produce flexible films. These 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (MxG-CNC-g-PPMA/[H]) not only display remarkable improvements in toughness (>25 times) and tensile...
Polymer-grafted nanoparticle (PGN) films were prepared from polystyrene (PS) grafted to rodlike cellulose nanocrystals (MxG-CNC-g-PS) with a controllable grafting density (0.03–0.25 chains/nm2) and molecular weight (5–60 kg/mol). These nanorod-based PGNs are solution- melt-processible, permitting access one-component composite high nanofiller loadings (with up 55 wt %). The impact of both polymer on the mechanical properties was investigated related brush conformation: concentrated (CPB),...
In recent years, the importance of safety in academic research laboratories has gained considerable attention nationwide. The University Chicago Joint Research Safety Initiative (JRSI) is a community graduate students, postdoctoral researchers, and assistants Department Chemistry Pritzker School Molecular Engineering, whose focus to facilitate sustainable lab culture by providing educational tools, training, resources that are presented an organized, clear, centralized fashion. Our...
Ionically conductive, hydrated polyelectrolyte nanocomposites are prepared from iodomethane-treated poly(2-vinylpyridine) (mPV)-grafted cellulose nanocrystals (MxG-CNC-g-mPV). These polyelectrolyte-grafted nanoparticle (PEGN) films exhibit an order-of-magnitude higher iodide ion conductivity relative to mPV and a high in-plane/through-plane anisotropy. The PEGN architecture prevents CNC aggregation, maximizing the CNC/polyelectrolyte interface. were with varying polymer graft density...
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionCorrection to "Enhanced Ion Conductivity through Hydrated, Polyelectrolyte-Grafted Cellulose Nanocrystal Films"James H. LettowJames LettowMore by James Lettow, Richard Y. KaplanRichard KaplanMore Kaplan, Paul F. Nealey*Paul NealeyMore Nealeyhttps://orcid.org/0000-0003-3889-142X, and Stuart J. Rowan*Stuart RowanMore Rowanhttps://orcid.org/0000-0001-8176-0594Cite this: Macromolecules 2022, 55, 3,...