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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 63 for “"Cellulose nanocrystals"”.
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Gel Development Using Cellulose Nanocrystals
Cellulose Nano Crystal (CNC) are naturally derived nanoparticles with a slender shape that own a remarkably high aspect ratio. Due to its mechanical properties with Young modulus in the range of 120-160 GPa and proven biocompatibility, CNC is an attractive nanoparticle for many applications. In the …
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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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Study of Hybrid Cellulose Nanocrystals in Polymeric Nanocomposites
… include carbohydrates such as starch, cellulose, pullulan, kefiran, and proteins. However, films from these biobased resources are brittle, moisture sensitive, and difficult to process for bioplastic applications. To address these challenges, various modification methods have been …
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Cellulose nanocrystals as a candidate for solar geoengineering
… This thesis focusses on 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 …
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Multiscale Modeling Of The Hierarchical Structure Of Cellulose Nanocrystals
<p>Cellulose constitutes the most abundant renewable polymeric resource available today. It considered an almost inexhaustible source of raw material, and holds great promise in meeting increasing demands for environmentally friendly and biocompatible products. Key future applications are currently …
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Chiral self-assembly of cellulose nanocrystals for photonic films
… A notable example 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, …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
Cellulose nanomaterials (CNMs) have been widely studied for their potential as sustainable fillers in polymer nanocomposites, optical responsiveness in suspensions and thin films, and their orientation-dependent liquid crystalline behavior in suspensions. Cellulose nanocrystals (CNCs) have seen a …
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Synthesizing a Heparin Mimic Material Derived from Cellulose Nanocrystals
… induced thrombocytopenia 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 …
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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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Utilisation of Cellulose Nanocrystals for the Fabrication of Photonic Materials
… length scale. As an example, naturally derived cellulose nanocrystals (CNCs) can be self-assembled to form a helicoidal nanostructured film that displays vivid structural colours, similar to the those observed in nature. While in recent years, enormous effort in the field has increased our …
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Cellulose Nanocrystals: Size Characterization and Controlled Deposition by Inkjet Printing
… research project investigates inkjet printing of cellulose nanocrystals (CNCs) as a possible method for the fabrication of cellulose micropatterns. CNCs were prepared from wood pulp by H₂SO₄ hydrolysis and characterized in terms of length, width, and thickness distributions by atomic force …
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Tunable organization of cellulose nanocrystals for controlled thermal and optical response
<p>The biorenewable nature of cellulose nanocrystals (CNCs) has opened up new opportunities for cost-effective, sustainable materials design. By taking advantage of their distinctive structural properties and self-assembly, promising applications have started to nurture the fields of flexible …
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Cellulose Nanocrystals as 'Green' Emulsifiers Stabilized Crude Oil in Water Emulsions
This study examines the ability of CNC to stabilize crude o/w Pickering emulsions. The effects of concentration of CNC, ionic strength of the aqueous phase, volume fraction of crude oil to water, and the presence of divalent ions on the stability of crude o/w emulsions were examined. Emulsions …
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Ovalbumin-Based Scaffolds Reinforced with Cellulose Nanocrystals for Bone Tissue Engineering
… they are also very 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 …
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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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The Potential of Cellulose Nanocrystals in the Detection and Treatment of Cancer
… for the development 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 …
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Nano-Modification for High Performance Cement Composites with Cellulose NanoCrystals and Carbon Nanotubes
… study is to utilize two 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 …
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Microstructural Engineering of Titanium-Cellulose Nanocrystals Alloys via Mechanical Alloying and Powder Processing
… thesis, titanium is mechanically alloyed with cellulose nanocrystals followed by powder consolidation and sintering to form a solid titanium metal matrix composite. Cellulose nanocrystals (CNCs) were chosen as the particle reinforcement as they are a widely abundant and natural material. …
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Isolation of Cellulose Nanocrystals: Data-Driven Identification of Key Factors Affecting Yield and Morphology
Cellulose nanocrystals (CNCs) are rod-like colloidal nanoparticles derived from natural cellulose sources. Among the various methods developed for their isolation, the treatment of cellulose fibres with sulfuric acid remains the most widely used. Although conceptually simple, this process involves …
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Understanding the Effect of Sizing and Cellulose Nanocrystals on S2 Glass Fiber Sheet Molding Compounds
… surface finish (sizing), and the addition of cellulose nanocrystals (CNCs) to improve the mechanical properties of S2-GFRPs. S2-GF/polyester SMC composites with three different types of glass fiber sizing were compared in terms of tensile, flexural and impact properties. The three types of …
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