A5035687012- Photopolymerization techniques and applications
- Carbon dioxide utilization in catalysis
- Machine Learning in Materials Science
- Fiber-reinforced polymer composites
- Advanced Polymer Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Polymer composites and self-healing
- Photochromic and Fluorescence Chemistry
- Mesoporous Materials and Catalysis
- Additive Manufacturing and 3D Printing Technologies
- Dyeing and Modifying Textile Fibers
- Polymer crystallization and properties
- Synthetic Organic Chemistry Methods
- Advanced Photocatalysis Techniques
- Organic Electronics and Photovoltaics
- Model-Driven Software Engineering Techniques
- Diatoms and Algae Research
- nanoparticles nucleation surface interactions
- Anodic Oxide Films and Nanostructures
- Silicone and Siloxane Chemistry
- Theoretical and Computational Physics
- Mechanical and Optical Resonators
- Cellular Mechanics and Interactions
- Block Copolymer Self-Assembly
- Epoxy Resin Curing Processes
Duke University
2023-2024
University of Illinois Urbana-Champaign
2018-2023
Thermosets present sustainability challenges that could potentially be addressed through the design of deconstructable variants with tunable properties; however, combinatorial space possible thermoset molecular building blocks (e.g., monomers, cross-linkers, and additives) manufacturing conditions is vast, predictive knowledge for how combinations these components translate to bulk properties lacking. Data science overcome problems, but computational methods are difficult apply...
Complex patterns integral to the structure and function of biological materials arise spontaneously during morphogenesis. In contrast, functional in synthetic are typically created through multistep manufacturing processes, limiting accessibility spatially varying systems. Here, we harness rapid reaction-thermal transport frontal polymerization drive emergence synthesis engineering polymers. Tuning reaction kinetics thermal enables internal feedback control over gradients pattern...
Abstract Bioinspired vascular networks transport heat and mass in hydrogels, microfluidic devices, self-healing self-cooling structures, filters, flow batteries. Lengthy, multistep fabrication processes involving solvents, external heat, vacuum hinder large-scale application of structural materials. Here, we report the rapid (seconds to minutes), scalable, synchronized thermosets fiber-reinforced composites under ambient conditions. The exothermic frontal polymerization (FP) a liquid or...
Fully-cycled depolymerization and repolymerization of a low ceiling temperature polymer, cyclic poly(phthalaldehyde) (cPPA), yielding high performance structural polymer is demonstrated. The facile conditions for cPPA circumvent the extreme required to break down recycle traditional thermoplastics thermosets. depolymerizes in as little 14 min at 120 °C, with concurrent evaporation quantitative recovery monomer. Polymerization recovered monomer produces molecular mechanical properties...
Thermoset polymers and fiber-reinforced polymer composites possess the chemical, physical, mechanical properties necessary for energy-efficient vehicles structures, but their energy-inefficient manufacturing lack of end-of-life management strategies render these materials unsustainable. Here, we demonstrate deconstruction upcycling high-performance poly(dicyclopentadiene) (pDCPD) thermosets with a concurrent reduction in energy demand curing via frontal copolymerization. Triggered material...
Transient polymers rapidly and controllably depolymerize in response to a specific trigger, typically by chain-end unzipping mechanism. Triggers, such as heat, light, chemical stimuli, are generally dependent on the chemistry of polymer backbone or end groups. Single electron transfer (SET), contrast other triggering mechanisms, is achievable various means including chemical, electrochemical, photochemical oxidation reduction. Here, we identify SET subsequent mesolytic cleavage major thermal...
With microstructures that typically favor crystallization at low temperatures, commercial polybutadiene elastomers often suffer from poor toughness and limited elongation when utilized in applications near room temperature. By controlling competition between primary secondary metathesis through phosphite inhibition of ruthenium catalysts during the ring-opening polymerization cyclooctadiene a bis-norbornene cross-linker, we effectively tune proportion cis trans alkenes resulting...
Thermoset polymers and fiber-reinforced polymer composites possess the chemical, physical, mechanical properties necessary for energy-efficient vehicles structures, but their energy-inefficient manufacturing lack of end-of-life strategies render these materials unsustainable. Here, we demonstrate deconstruction upcycling high-performance poly(dicyclopentadiene) (pDCPD) thermosets with a concurrent reduction in energy demand curing via frontal copolymerization. Triggered material is achieved...
Data science can accelerate materials discovery by learning composition-processing-performance models from pre-existing data sets, which then feed into active cycles in the laboratory. Thermoset polymer waste is a pressing environmental challenge that may be addressed accelerated of new deconstructable variants; however, combinatorial space possible monomers, crosslinkers, additives, and manufacturing conditions vast Edisonian experimentation struggle to find optimal designs. Moreover,...
Thermoset polymers and fiber-reinforced polymer composites possess the chemical, physical, mechanical properties necessary for energy-efficient vehicles structures, but their energy-inefficient manufacturing lack of end-of-life strategies render these materials unsustainable. Here, we demonstrate deconstruction upcycling high-performance poly(dicyclopentadiene) (pDCPD) thermosets with a concurrent reduction in energy demand curing via frontal copolymerization. Triggered material is achieved...