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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 18 of 18 for “"Cellulose fibers"”.
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Chemical Modification of Cellulose Fibers and their Orientation in Magnetic Field
… a novel technique for orientating natural fibers like cellulose in a viscous polymer matrix such as polylactic acid (PLA) by applying the concepts of magnetism. Orientation of cellulose fibers in a PLA was achieved by modifying the cellulose fibers with a ferromagnetic entity and subjecting …
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Development of hydrophobic thermoplastic starch composites
… composites achieved by incorporation of cellulose fibers as the reinforcement within the glycerol plasticized matrix formed by thermoplastic cornstarch biopolymer. The function of starch-based polymers is limited due to poor mechanical properties. However, it is improved with forming a …
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Development, application and early-age monitoring of fiber-reinforced ‘crack-free’ cement-based overlays
… included different sizes of polypropylene and cellulose fibers and one type of glass fiber (volume fraction ranging between 0-0.4%). Glass fibers at a small dosage of 0.1% were the most efficient fiber and completely eliminated cracking. Of the two field projects considered: one was a plaza …
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Chlorhexidine Interaction with Microcrystalline Cellulose
… stains due to chemical interactions with cellulose fibers. Previous research has identified compounds such as Parachloroaniline (PCA), which contribute to both toxicity and fiber degradation. This study aims to further analyze the breakdown products of chlorhexidine and sodium hypochlorite …
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Electrospun Nanocellulose: A New Biomaterial
… to serve as scaffolds for cellular integration. Cellulose in many forms has been demonstrated as potential biopolymer for tissue engineering; however, it has not been previously electrospun into a scaffold for tissue engineering applications. The overall goal of this research project was to …
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A study of the crease-resistance of viscose rayon
… is a very greatly desirable property in textile fibers. Of the natural fibers, wool exhibits this property to the greatest degree, followed by silk, cotton, and flax, which has a very low crease-resistance. The artificial cellulose fibers fall considerably below wool and silk in this respect. The …
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Increased production of aligned cellulose nanofibrils using microfluidic mixture chambers
In this thesis, the production 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 …
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Self-Assembly of Pullulan Abietate on Cellulose Surfaces
… phase transitions exist between regions of cellulose, hemicellulose, and lignin and therefore adhesion between adjacent phases is increased. The formation of interphases occurs as a consequence of the self-assembly process which governs the formation of wood. If this process was understood …
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Lignocellulose Saccharification via Cellulose Solvent Based Fractionation Followed by Enzymatic Hydrolysis: the Last Obstacle to Integrated Biorefineries
… structure of lignocellulosic biomass. Cellulose- and organic-solvent-based lignocelluloses fractionation (COSLIF) technology was employed to overcome biomass recalcitrance. Surface response methodology (SRM) showed that optimal COSLIF pretreatment conditions were 85% (w/v) H₃PO₄ and ~50 …
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Cellulose-based fibers from liquid crystalline solutions
Solutions of cellulose esters with different concentrations in dimethylacetamide (DMAc) and with different types of substituents were studied in relation to their liquid crystalline (LC) solution behavior. Classical LC behavior was revealed for all solutions. Critical polymer concentration …
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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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Increasing Sustainability of the Papermaking Process via Formulation of Cellulose Nanofibers and Polyelectrolyte Complexes
… use of a renewable and biodegradable material: cellulose. However, the sustainability of paper is not only reliant on the material itself, but on the process used to produce paper. A trade-off when processing cellulose into paper, compared to production of materials from fossil fuel-based …
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Pump-free magnetophoresis for improved point-of-care diagnostics
… due to the natural capillary action through cellulose fibers and simple fabrication. µPADs are portable, low-cost, and do not require external instrumentation, making them ideal for POC settings. However, µPADs often suffer from poor analytical performance resulting in failing to translate to …
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Integrated processing of brewer's spent grain into value-added protein feedstuff and cellulose adsorbent
… BSG into value-added protein-rich feedstuff and cellulose absorbent. The objectives of the research detailed here were to 1) develop a process to simultaneously produce protein-rich (PP) and fiber-rich products (FP) from BSG, 2) assess the replacement of fishmeal with PP in shrimp feed, 3) …
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Hydrodynamic interactions of complex fluids and fibrous media
Hydrodynamic interactions of fluids and fibers are encountered in many applications, from filtration processes to the development of novel materials such as nanofluids and nanocomposites, and even in biological systems such as transport of fluids in plants and tissues. It is therefore, valuable …
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Hydrophobization of Cellulose-Based Fibers for Packaging Applications with Alkyl Ketene Dimers (AKD) and Food-Grade Waxes via Supercritical Impregnation with Carbon Dioxide – Experimental and Thermodynamic Modeling Approaches
This modified material has applications in food packaging, where frequently water-repellant surfaces are required. This method is preferable to traditional coating methods because it sizes across the entire thickness of the substrate rather than just the surface and can be used for non-planar …
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Synthesis and Characterization of Cationic Spherical Polyelectrolyte Brushes
… at first, excessive CPAM were added to bind cellulose fibers and CaCO3 fillers and formed loose macroflocs with positive charges; then the agglomerations were broken into microflocs by strong shear strength; at last, anionic SPB with negative charges were added and caused much finer and …
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Durability of cement and concrete matrices incorporating nanocellulose fibers (NCF)
L'introduction des nanofibres de cellulose (NFC) représente une avancée significative dans le domaine des matériaux de construction, offrant des propriétés mécaniques, une durabilité et une rentabilité supérieures par rapport aux fibres traditionnelles. Face aux inquiétudes concernant la durabilité …