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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 51 for “"CNCs"”.
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The effect of acid mixtures on biomass cellulose poly (Furfuryl) alcohol nanocomposites
Recently, extraction of cellulose nanocrystals (CNCs) via acid hydrolysis using sulphuric acid has been intensively studied. Moreover, the use of sulphuric acid requires shorter hydrolysis time, while producing stable suspensions with high yield and crystallinity. However, it results in CNCs with …
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Bioactive Cellulose Nanocrystal Reinforced 3D Printable Poly(epsilon-caprolactone) Nanocomposite for Bone Tissue Engineering
… the potential use of cellulose nanocrystals (CNCs) as multi-functional additives that enhance the mechanical properties and increase the biomineralization rate of PCL. To this end, an in vitro biomineralization study of both sulfuric acid hydrolyzed-CNCs (SH-CNCs) and surface oxidized-CNCs …
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Fabrication and characterization of cellulose nanocrystal enhanced sustainable polymer nanocomposites through surface chemistry and processing
<p>Cellulose nanocrystals (CNCs) belong to a class of cellulose based nanomaterials that are extracted from renewable and sustainable sources and have excellent mechanical and thermal properties. While applications for CNCs have been expanding, one of the challenges of utilizing CNCs is to overcome …
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Nanocomposites: Incorporation of Cellulose Nanocrystals into Polymers and Addition of Zwitterionic Functionality
Cellulose nanocrystals (CNCs) are nanomaterials that have shown promise as reinforcement filler materials. Their small size, high modulus, and high aspect ratio makes CNCs good reinforcing materials. CNCs are typically introduced into softer polymer materials, which can have incompatible surface …
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Nano-Modification for High Performance Cement Composites with Cellulose NanoCrystals and Carbon Nanotubes
… different nano-fibers, cellulose nanocrystals (CNCs) and carbon nanotubes (CNTs) to modify the nanoscale structures of cement composites and thereby improve the performance at the macro-level. This study also evaluates the mechanism behind the modification, since fiber bridging, the most common …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
… behavior in suspensions. Cellulose nanocrystals (CNCs) have seen a particular prominence due to their versatility across a breadth of applications. The unique structure of CNCs, represented as nanoscale rods with a slight twist, provides for their self-assembly into liquid crystalline phases when …
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Surface Functionalisation and Characterisation of Cellulose Nanocrystals
Cellulose nanocrystals (CNCs) are elongated nanoscale crystalline particles able to be extracted from cellulose. They are noted for their combination of strength, stiffness, low density, and biodegradability, as well as emergent properties, such as forming birefringent liquid crystals. CNCs have …
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Smart Polymer Electromechanical Actuators for Soft Microrobotic Applications
… coated with conductive network composites (CNCs) and conductive electrodes on both sides. A series of experiments on IEAP actuators with various types of CNCs has demonstrated the existence of a direct correlation between the performance of actuators and physical and structural properties of …
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Study of Hybrid Cellulose Nanocrystals in Polymeric Nanocomposites
… the environment. Thus, cellulose nanocrystals (CNCs) are being investigated as an alternative natural filler material. Cellulose is the most abundant biopolymer on Earth extracted from a wide range of resources, including wood, bacteria, and tunicate which is a marine animal. In the past …
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Experimental and modeling investigation of cellulose nanocrystals polymer composite fibers
<p>Cellulose nanocrystals (CNCs) are a class of newly developed and sustainable nanomaterial derived from cellulose-based materials such as wood. There have been substantial research efforts to utilize these materials as reinforcing agents. However, in order to develop CNC nanocomposites with …
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Cellulose nanocrystals as a candidate for solar geoengineering
… a new candidate for SAI: cellulose nanocrystals (CNCs) as a safe and possibly sustainable alternative. It will also investigate the potential for CNCs to act as cloud condensation nuclei, for deliberate or inadvertent MCB. CNCs are a bio-sourced nanomaterial, isolated from naturally occurring …
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The Isolation of Cellulose Nanocrystals from Pistachio Shells and Their Use in Water Actuating Smart Composites
… amount of research into cellulose nanocrystals (CNCs). These materials are categorized as being between 5 and 10 nm wide and being 100-250 nm long. CNCs have several uses, but the most common is the reinforcement of polymer composites. Here I present 2 papers investigating CNC-based composites. …
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Synthesizing a Heparin Mimic Material Derived from Cellulose Nanocrystals
… and osteoporosis. Cellulose nanocrystals (CNCs) contain the same 1,4 linked pyranose backbone structure as heparin along with desirable mechanical properties, like high stiffness and anisotropic shape. By altering the functionalization on the surface of CNCs to closely mirror that of …
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The Potential of Cellulose Nanocrystals in the Detection and Treatment of Cancer
… of the perfect system. Cellulose nanocrystals (CNCs) have been studied widely for a variety of applications. Despite their advantages, investigations of their abilities in the biomedical field have not been explored. The goal of this project is to delve into the potential uses of CNCs in …
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Ovalbumin-Based Scaffolds Reinforced with Cellulose Nanocrystals for Bone Tissue Engineering
… fragile. Extremely stiff cellulose nanocrystals (CNCs), derived from wood pulp, can be utilized to reinforce these scaffolds while improving biocompatibility. When chemically modified to incorporate surface amine groups, cellulose nanocrystals become capable of covalently crosslinking with the OVA …
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Mechanics and manufacturing of crosslinked cellulose nanocomposites
Cellulose nanocrystals (CNCs) are naturally derived and renewable nanostructures with exceptional mechanical and chemical properties. Consequently, CNCs provide a compelling platform to study the mechanical properties and manufacturing processes of nanocomposites, toward sustainable, …
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Polylactic Acid based Blends and Composites for Material Extrusion 3D Printing: Formulation, Characterization, and Processing
… composites containing cellulose nanocrystals (CNCs), suitable for material extrusion 3D printing. In the first part, epoxidized canola oil (ECO), was utilized as a compatibilizer for PLA/PBAT blends at different weight ratios to produce toughened materials suitable for 3D printing applications. …
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Chiral self-assembly of cellulose nanocrystals for photonic films
… is the self-assembly of cellulose nanocrystals (CNCs) into nanostructured films. CNCs are elongated colloidal particles that spontaneously form a cholesteric liquid crystal phase in aqueous suspension. This helicoidal configuration can be preserved as the suspension dries, resulting in films with …
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Effect of Cellulose Nanocrystals on the Rheology, Curing Behavior, and Fracture Performance of Phenol-Formaldehyde Resol Resin
… determine the effects of cellulose nanocrystals (CNCs), as potential additives, on the properties and performance of phenol–formaldehyde (PF) adhesive resin. The steady-state viscosity of a commercial PF resol resin and three CNC–resin mixtures, containing 1–3 wt % CNCs, based on solids content, …
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Large area cellulose nanocrystal self-assembly: towards sustainable pigments
… by self-assembly of cellulose nanocrystals (CNCs). CNCs are rod-like colloids capable of arranging into a liquid crystalline phase above a critical concentration in suspension. So far, the process that governs the self-assembly of CNCs into photonic structures was studied only at small scale. …
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