Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"nanofibrils"”.
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Modulating metalloproteinase activity with protein nanofibrils
… other desirable features, recommends protein nanofibrils (PNFs) as a new scaffold for wound healing therapy. MMPs share a homologous catalytic domain, required for all MMP functions. In this thesis, the catalytic domain along with the pro-domain and fibronectin domain of human MMP9 …
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Increased production of aligned cellulose nanofibrils using microfluidic mixture chambers
… of cellulose macroscale fibers from cellulose nanofibrils using flow focusing in microfluidic mixture chambers is examined and tested. This process accomplishes the difficult task of aligning cellulose nanofibrils and gelling them together to create macroscale cellulose fibers, and this study …
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Highly Tough, Stiff, and Transparent Poly(Methyl Methacrylate) Composites Incorporating Thermoplastic Elastomer Nanofibrils
… their strength and stiffness. High aspect ratio nanofibrils of three different thermoplastic elastomers (i.e., thermoplastic polyester elastomer, polyether block amide, and thermoplastic polyurethane) are developed and incorporated into poly(methyl methacrylate) (PMMA) to fabricate …
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PP and Nanofibrillated-PET Composites from Melt Blowing: Fundamentals to Scale-Up
… bacteria removal. Both melt blown and spunbonded nanofibrils were compared in terms of their morphology and final reinforcement performance after creating solid and foam injection-molded samples. Melt blown nanofibrils, partly due to their smaller diameter, provided superior mechanical …
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Template-directed Assembly of Silk in Advanced Materials for Food Security
… into higher order structures (e.g. β-sheeted nanofibrils). Modulation of the relative concentration between silk fibroin and the peptide seeds, silk fibroin molecular weight and pH allows for precise control over nanofibrils morphologies and mechanical properties. More importantly, silk …
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Electromagnetic Control of Biological Assembly
… to fabricate customizable networks of cellulose nanofibrils. This work describes how the motion of Acetobacter xylinum can be controlled by electric fields while the bacteria simultaneously produce nanocellulose, resulting in networks with aligned fibers. Since the electrolysis of water due to …
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Controlled self-assembly of natural proteins into hierarchically structured functional materials
… of silk-inspired protein-based microfibres using nanofibrils obtained from a milk-derived protein, β-lactoglobulin. The fibres were generated using a miniaturized fluidic device, which enables precise control of the hydrodynamic forces applied to the nanofibrils and thus replicates the natural …
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Large area cellulose nanocrystal self-assembly: towards sustainable pigments
… colours in plants are obtained using cellulose nanofibrils organised in helicoidal architectures. Interestingly, similar helicoidal architectures with analogous optical response can be obtained in vitro by self-assembly of cellulose nanocrystals (CNCs). CNCs are rod-like colloids capable of …
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Cellulose Nanofoams: 3D Printing and Characterization
… and mechanical properties of cellulose nanofibrils (CNF) nanofoams, and developing a reproducible methodology for printing customized three-dimensional (3D) structures using direct-ink-write (DIW) technology and molding. We developed composite nanofoams using TEMPO-modified cellulose …
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TEMPO-oxidized Nanofibrillated Cellulose Film (NFC) incorporating Graphene Oxide (GO) Nanofillers
… a new system of novel TEMPO-oxidized cellulose nanofibrils (TOCNs)/graphene oxide (GO) composite, the 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation was utilized to disintegrate never-dried wood nanofibrillated cellulose (NFC). GO was incorporated through high intensity …
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Nanomaterials from lignocellulosic biomass : tailorable synthesis via surface functionalization and self-assembly mechanisms
… (LNPs) and lignin-containing cellulose nanofibrils (LCNFs). First, the lignin self-assembly in the formation of nanolignin was illustrated via combining the experimental data and the theoretical calculations. A modeling method applying Derjaguin-Landau-Verwey-Overbeek's (DLVO) theory and …
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Developments in White Pigment Production Using Biocompatible Cellulose-Based Materials
… method using natural cellulose nanofibrils (CNFs) was introduced. This approach enables the production of ultra-light and highly porous cellulose aerogel microparticles, thereby opening up the possibility of using natural cellulose material for white pigment particle production. …
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INVESTIGATION OF PROCESSING-STRUCTURE-PROPERTY RELATIONS IN VAPOR PHASE MODIFIED CELLULOSIC MATERIALS
… cellulose free-standing film made from cellulose nanofibrils) were investigated for their corresponding properties after ALD reaction. Specifically, this work contains three sections, which are (1) Investigating the heat stimulated surface wettability transition after “low” cycle ALD reaction on …
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Increasing Sustainability of the Papermaking Process via Formulation of Cellulose Nanofibers and Polyelectrolyte Complexes
… More recent advancements introduce cellulose nanofibrils (CNFs) as additives in papermaking to improve properties and potentially replace plastics for multi-layer packaging applications. The trade-off, however, is that their micron and nanosized features require even greater amounts of energy …
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Characterisation and development of carbon nanotube macrostructures
… similarities to fibrous composites, with nanofibrils extending from each side of the fracture. In some microfibres, the stress-strain behaviour shows evidence of this as a “tail" artefact after fracture. One microfibre was studied in detail, showing a tail length of about 100 μm, …
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Structural Analysis of Reconstituted Collagen Type I - Heparin Cofibrils
… - 260 nm, symmetric fibrous longspacing (FLS IV) nanofibrils with AP of 165 nm, and cofibrils exhibiting an asymmetric D-periodicity of 67 nm with a striking resemblance to the native collagen type I banding pattern. The intercalation of the high negatively charged heparin in the cofibrils was …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
… 1-oxyl (TEMPO) oxidized cellulose nanofibrils (TOCNFs) was prepared through solution casting to improve the mechanical performance of the individual reinforcements alone. The physical interaction length is increased by incorporating CNMs of different length scales resulting in …
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Novel Biodegradable Poly (Glycolic Acid) Dual-Layer Packaging System Using Spray Coating
Polymer films are essential barriers for food and consumer packaging, but because they are durable, they contribute to accumulating waste that infiltrates ecosystems, enters food chains as microplastics, and overwhelms disposal systems. This research responds by developing a biodegradable packaging …
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Development of Cellulose-Titanium dioxide-Porphyrin Nanocomposite Films with High-barrier, UV-blocking, and Visible Light-Responsive Antimicrobial Features
The packaging does not serve as a mere containment but also can be designed to play a key role in preserving the product from quality-deteriorating factors, including oxygen, light irradiation, and foodborne pathogenic microorganisms (e.g., Escherichia coli). There has been a growing interest in …
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