A5070013819- Advanced Cellulose Research Studies
- biodegradable polymer synthesis and properties
- Electrospun Nanofibers in Biomedical Applications
- Polysaccharides and Plant Cell Walls
- Nanocomposite Films for Food Packaging
- Advanced Data Storage Technologies
- Polymer Surface Interaction Studies
- Biofuel production and bioconversion
- Synthetic Organic Chemistry Methods
- Additive Manufacturing and 3D Printing Technologies
- Microplastics and Plastic Pollution
- Advanced Polymer Synthesis and Characterization
- Lignin and Wood Chemistry
- Material Properties and Processing
University of Maine
2020-2024
Regardless of their applications, polymers are still considered mechanically weak and functionally insufficient for certain demanding coating adhesive uses. To address those issues, nanomaterials have been extensively studied as reinforcing fillers, which proven to effectively promote the performance polymer coatings/adhesives. However, conventional nanofillers expensive non-biodegradable. Meanwhile, cellulose (CNMs), a class produced from biomass feedstocks, can circumvent drawbacks...
Cellulose nanofibrils (CNFs) are a promising reinforcement for biodegradable composite matrices such as poly(lactic acid) (PLA), but they require commercially scalable drying methods that preserve their fibrillar morphology along with improved interfacial interactions polymer matrices. In this work, water-based grafting-through polymerization scheme to modify CNFs spray behavior and capacity in PLA composites. All modifications yielded more after drying, increasing specific surface area by...
Aqueous surfactant free emulsion grafting-through polymerization produced poly(methyl methacrylate) coated cellulose nanofibrils that retained microstructure and strengthened poly(lactic acid) composites.
Abstract Modifying the surface of cellulose nanofibrils (CNFs) produced by mechanical refinement with a variety polymer functional groups in an entirely water‐based system is challenging because only hydroxyl are accessible. To address this limitation, water‐based, modification scheme developed. CNFs functionalized reactive methacrylate group followed subsequent grafting‐through polymerization. This worked water‐soluble and water‐insoluble (meth)acrylates (meth)acrylamides, grafting up to 45...
A simple strategy was developed to synthesize polyimine-coated cellulose nanofibrils (CNF) for effective CNF drying and composite reinforcement. The polyimine synthesized in an aqueous medium using a selective hydrophilic hydrophobic component that forces the precipitate, which prevents reverse imine reaction. coating allowed be easily oven-dried while maintaining fibrillar morphology provide mechanical reinforcement poly(ethylene terephthalate glycol) (PETG) composites. In comparison, poor...
Cellulose nanofibrils (CNFs) are abundant materials limited in application by their hydrophilic nature and fibrillar collapse during drying. Herein, hydrophobic CNFs (PS-MetCNFs) were produced via the grafting of polystyrene through a methacrylate handle on modified CNFs. This modification prevented upon drying with as low 3.5 wt % polystyrene. System characterization kinetics studies controls revealed that surfactant-free emulsion polymerization ran parallel to grafting-through...
This work demonstrates the application of pilot-scale surface functionalization cellulose nanofibrils (CNFs) by aqueous grafting-through polymerization and subsequent spray drying in 3D printed poly(lactic acid) (PLA) composites.
Well-defined and densely grafted amphiphilic cationic bottlebrush block copolymers (BBCPs) containing polystyrene (PS) quaternary ammonium polymer (PDMH) side chains, PS-b-PDMH, were successfully generated from grafting-through ring-opening metathesis polymerization. The BBCP thin films, analyzed by atomic force microscopy (AFM), could self-assemble into distinct nanometer-scale domains of which the morphologies manipulated volume fraction (fPDMH), degree polymerization, asymmetric...