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Dissertations / Theses on the topic 'Cellulose fibers'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Molinarolo, Susan L. "Sorption of xyloglucan onto cellulose fibers." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/5760.

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Xyloglucan is a hemicellulose found in the primary cell walls of many plant species. Found adjacent to the cellulose, it is believed to function as a cementing material which contributes crosslinks and rigidity to the cellulose framework. The only noncovalent linkage reported in the primary cell wall cellulose-hemicellulose-pectic polysaccharide matrix of the cultured tissues is that between xyloglucan and cellulose. Therefore, the xyloglucan:cellulose association has been of great interest to researchers. Xyloglucan can be bound to cellulose in vitro to simulate this in vivo relationship. Pr

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2

Pineda, Rocio Nahir. "Biocomposite with Continuous Spun Cellulose Fibers." Thesis, Luleå tekniska universitet, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80968.

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The subject of this project is to study spun cellulose fibers made by Spinnova Oy inFinland. The fibers are spun using an environmentally friendly spinning process withoutuse of harsh chemicals.The spun filaments and the yarn based on these filaments were characterized and usedas reinforcement in polylactic acid biopolymer (PLA) and in biobased epoxy resin. Acomprehensive mechanical and morphological characterization of the single filamentsand their yarn was conducted. It was found that the single filaments are flat with a largewidth/thickness ratio, they are porous especially on one side and

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3

Sharma, Sudhir. "Green barrier materials from cellulose nano fibers." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54450.

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Renewable, recyclable, and high performing barrier materials were made from cellulose nano fibers. Various strategies to enhance performance in dry, wet and humid conditions were proposed. These methods included thermal treatment to induce hornification, PAE resin based cross linking, and inclusion of high aspect ratio filler materials to form composites. Results indicated that hornification alone, even though effective in enhancing the barrier properties comes at the cost of severe degradation of mechanical properties. In the second case, where a cross linker was used, lower heatin

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4

Davé, Vipul. "Cellulose-based fibers from liquid crystalline solutions." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/39205.

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5

Davé, Vipul. "Cellulose-based fibers from liquid crystalline solutions /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08232007-112345/.

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6

Reye, John Timothy. "Enhanced enzymatic hydrolysis of cellulosic fibers by cationic polyelectrolytes." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39633.

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A new method for enhancing rates of enzymatic hydrolysis for cellulosic fiber is presented. By adding a cationic polyelectrolyte to a cellulase/cellulose hydrolytic system, the polyelectrolyte binds to the cellulase and fiber forming flocs. The cellulase is bound by a patching mechanism. By using this technique, the rate of enzymatic hydrolysis can be enhanced. This thesis covered observations made about the cellulase/cationic polyelectrolyte/fiber interactions. A mechanism was proposed based on the experimental results.

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7

Brancato, Adam Anthony. "Effect of progressive recycling on cellulose fiber surface properties." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26504.

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Thesis (Ph.D)--Chemical and Biomolecular Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Sujit Banerjee; Committee Member: Frances Walsh; Committee Member: Peter Ludovice; Committee Member: Timothy Patterson; Committee Member: Yulin Deng. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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8

Thomson, Cameron Ian. "Probing the Nature of Cellulosic Fibre Interfaces with Fluorescence Resonance Energy Transfer." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16277.

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The material properties of fibre networks and fibre reinforced composites are strongly influenced by fibre-fibre interactions. Stress transfer between load bearing elements in such materials is often dictated by the nature of the fibre-fibre interface. Inter-fibre bonding is solely responsible for internal cohesion in paper, because all stresses transferred between fibres operate through fibre-fibre bonds. . The future development of cellulosic fibre materials will require an improved understanding of the fibre-fibre interface. Fluorescence resonance energy transfer (FRET) was proposed as a

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9

Borghi, Andrea. "Cellulose hollow fibers membranes for ion-exchange chromatography." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20289/.

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The development of an efficient and cost-effective purification process is the objective of protein separation. Usually, the most common procedure is chromatography, typically performed in a packed bed column; however, the cost is relatively high. Nowadays, one of the most interesting and promising method is the employment of particular membranes, the hollow fibers, in the standard chromatographic operations. Hollow fibers membranes were developed in the 1960s, specifically for reverse osmosis; nonetheless, they are now largely applied in both liquid and gaseous applications. In this proje

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10

Hussain, Arif. "Adsorption of Polyvinyl Alcohol on Nano-Cellulose Fibers." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-6720.

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Nano-cellulose fibers/suspension has very high viscosity, its viscosity has to be lower before it can be applied in the paper coating recipe. For this purpose the adsorption behaviour of polyvinyl alcohol on nano-cellulose fibers were investigated using method developed by Zwick in 1960, based on the formation of PVA-iodide blue complex in the presence of boric acid. The experiments showed that the maximum adsorbed amount i.e. 0.13 g PVA/g NFC was obtained in a dispersion with 0.2 % PVA concentration. It should be possible to further increase the PVA adsorption as the adsorbed amount didn’t re

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11

Mangiante, Gino. ""Green" and innovative chemical modifications of cellulose fibers." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0024.

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Ce projet de recherche mené en collaboration avec le CTP (Centre Technique du papier) a eu comme objectif de mettre en place une stratégie de greffage de polymères sur des fibres de cellulose via « Chimie Click » dans l’eau et dans des conditions douces et respectueuses de l’environnement afin de conférer de nouvelles propriétés mécaniques aux papiers résultants. La première étape a été d’élaborer une fonctionnalisation alcyne des fibres dans des conditions douces – dans l’eau ou dans un mélange eau/isopropanol – permettant à la fois une fonctionnalisation conséquente tout en préservant la cri

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12

Sharma, A. "Relating the properties of cellulose fibers to structure." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2019. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5843.

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Polymer fibers are ubiquitous. Applications of polymer fibers are wide ranging, spanning diverse fields such as textiles, biomedical materials, etc. These fibers are manufactured using very different processing techniques. For example, silk is spun by silkworms, PET fibers are spun from the melt state, polyethylene fibers are spun from gels. This thesis is focused on the structural investigation of semicrystalline regenerated cellulose fibers and on structure-property relations in these materials. To convert cellulose into continuous filaments, it is dissolved and regenerated using two domin

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13

Tze, William tai-Yin. "Effects of Fiberimatiux Interactions on the Interfacial Deformation Micromechanics of Cellulose-Fiberipolymer Composites." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/TzeWT2003.pdf.

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14

Orhan, Münire. "Polylactide Foams Reinforced with Wood Fibers or Microfibrillated Cellulose." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-140087.

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The growing environmental awareness of pollution and climate change has set up newrules and regulations, which forces the industries to seek and satisfy the demand formore alternative and renewable products. Research has been launched for findingnovel lightweight materials for packaging, transportation and construction. Currently,there is an interest of finding new applications of new forms of cellulose since theyoffer low density and cost, renewability and biodegradability. The potential of usingnano-scale cellulose as reinforcement in novel forms of composite materials opens upa fairly new u

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15

Park, Sunkyu. "Drying Behavior of Cellulose Fibers Characterized by Thermal Analysis." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-04282006-140641/.

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The objective of this research is to understand the drying behavior of cellulose fibers characterized by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). A parameter termed ?hard-to-remove (HR) water content? was defined as the ratio of water mass to fiber mass at the transition between the constant and falling rate drying zones of an isothermal TGA experiment. The HR water content showed a linear relationship with water retention value. TGA and DSC were used to explain the linear relationship. During drying, free water was observed to evaporate first, followed by

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16

Sabzalian, Zohreh. "Cross-linking and hydrophobization of chemically modified cellulose fibers." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114269.

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Owing to its unique structure, along with the inexhaustible renewability, cellulose has been a subject of scientific and commercial interest for over 150 years. However, given attractive structural properties, such as stiffness, hydrophilicity, stereoregularity, potential for chemical modifications and ability to form superstructures, utilization of this biopolymer is far below its potential. Over the past few years the number of research projects to modify cellulose fibers to make them more suitable for numerous applications has increased. Transforming hydrophilic cellulose fibers into hydrop

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17

De, Matos Fernandes Susana. "Novel materialsbased in chitosan, its derivates and cellulose fibers." Pau, 2010. http://www.theses.fr/2010PAUU3010.

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L’objectif de cette étude est de développer de nouveaux matériaux à base de chitosane, de ses dérivés et de fibres de cellulose, sous la forme de nanofibres ou de feuille de papier. Des échantillons de chitosane purifié ont été utilisées afin de préparer les films nanocomposites transparents à base de chitosane (CH) comme matrice (deux chitosanes avec différentes masses molaires et leurs dérivés solubles dans l'eau) et de cellulose nanofibrillaire (NFC) ou de cellulose bactérienne (BC). Les films obtenus sont très transparents; ils affichent de meilleures propriétés mécaniques que ceux à base

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18

Kerim, Kyzy Bermet. "Evaluation of cellulose nanocrystal alignment in oriented electrospun fibers." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65856.

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Electrospinning is a fiber production method that has gained a special attention due to the simple setup and potential for the industry scale up to produce nanoregime polymer fibers. However, electrospun fibers have relatively poor mechanical properties, which could be improved by introducing reinforcing agents. Cellulose nanocrystals (CNCs) are a promising candidate for use as such fiber reinforcing phase due to nanoscale dimensions, excellent mechanical properties, abundance in nature, biocompatibility and renewability. The mechanical properties of reinforced fibers can be further improved b

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19

García, Vogel Andrés. "Production of regenerated nanocomposite fibers based on cellulose and their use in all-cellulose composites." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65897.

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Biobased all-cellulose composites (ACCs), in which the matrix and the reinforcement are made out of the same material, have gained a noticeable increased attention in recent years. Their successful application would solve the commonly faced challenges with natural fiber composites regarding their chemical antipathy between the hydrophilic fiber and the usually hydrophobic polymer matrix, while still keeping the advantages of being environmental friendly. Moreover, the use of man-made continuous regenerated cellulose fibers for this purpose could result in unidirectional all-cellulose composite

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20

Cranston, Emily D. "Polyelectrolyte multilayer films containing nanocrystalline cellulose." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115864.

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In the past decade, electrostatic layer-by-layer (LBL) assembly has gained attention because it is a facile and robust method to prepare thin polymer films. Due to the industrial importance and natural abundance of cellulose, its incorporation into LBL films is of particular interest. This thesis examines the use of nanocrystalline cellulose, prepared by sulfuric acid hydrolysis of cotton, in polyelectrolyte multilayer films. Conventional solution-dipping and a spin-coating variant of LBL assembly both resulted in chemically defined, reproducible, and smooth films with adjustable properties. S

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21

Mathews, Jeffrey David. "Surface charge characterization of pulp fibers and charge distributions in papermaking slurry /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5504.

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22

Beltramino, Heffes Facundo. "Enzymatic-assisted preparation of nanocrystalline cellulose from non-wood fibers." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/404447.

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In the current scenario of growing environmental concerns, the search for innovative, renewable, non-polluting materials has never been as intensive as it is today. Cellulose, being the most abundant polymer on earth, offers a wide range of possibilities for fulfilling current and potential future needs for novel materials. In this direction, research in the field of nanocrystalline cellulose (NCC) has attracted a great interest in recent years. However, this great interest has been shadowed by the low yields yet offered by published works concerning this matter. With the aim of addressing thi

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23

Khalf, Abdurizzagh. "Production of hollow fibers by co-electrospinning of cellulose acetate." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1908.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2009.<br>The study concerns the use of the electrospinning technique for the formation of cellulose acetate hollow nanofibers. These hollow fibers are used to manufacture hollow fiber membranes. Important properties that should be inherent to these hollow-nanofibers include excellent permeability and separation characteristics, and long useful life. They have potential applications in filtration, reverse osmosis, and the separation of liquids and gases. It is apparent from the available literature on electrospinning and c

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24

Fält, Susanna. "Model studies of cellulose fibers and films and their relation to paper strength." Licentiate thesis, KTH, Fibre and Polymer Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1575.

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<p>The objectives of this work were (i) to develop a new methodfor the preparation of thin cellulose model films, (ii) to usethese model films for swelling measurements and (iii) to relatethe swelling of fibers and films to the dry strength ofpaper.</p><p>In the new film preparation method, NMMO(N-methylmorpholine-N-oxide) was used to dissolve cellulose andDMSO (dimethyl sulfoxide) was added to control the viscosity ofthe cellulose solution. A dilute solution of the cellulose wasspin-coated onto a silicon oxide wafer and the cellulose filmthus prepared was then precipitated in deionised water.

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25

Peters, Sarah June. "Fracture Toughness Investigations of Micro and Nano Cellulose Fiber Reinforced Ultra High Performance Concrete." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/PetersSJ2009.pdf.

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26

Rao, Swati Suryamohan. "Enzymatic hydrolysis of cellulosic fiber." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29639.

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Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Banerjee Sujit; Committee Member: Deng Yulin; Committee Member: Haynes Danny. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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27

Gustafsson, Emil. "Tailoring adhesion and wetting properties of cellulose fibers and model surfaces." Licentiate thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91296.

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The layer-by-layer (LbL) technique was used to modify the surface of cellulose fibers by consecutive adsorption of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) followed by a final adsorbed layer of anionic paraffin wax colloids. Paper hand sheets made from the modified fibers were found to be highly hydrophobic with a contact angle of 150°. In addition to the significantly increased hydrophobicity, the sheets showed improved mechanical properties, such as a higher tensile strength. Heat treatment of the prepared sheets further enhanced both the mechanical properties and th

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28

Sambi, Trifoni J. "Treatment of cotton-cellulose by electrogenerated chemical species." Thesis, Queensland University of Technology, 2002.

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29

Wang, Weijun. "A study of the adsorption properties of quaternized cellulose." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/WANG_WEIJUN_40.pdf.

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30

Berggren, Rickard. "Cellulose degradation in pulp fibers studied as changes in molar mass distributions." Doctoral thesis, KTH, Fibre and Polymer Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3499.

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<p>In this thesis, size-exclusion chromatography (SEC) of woodpolymers dissolved in lithium chloride/N,N-dimethylacetamide(LiCl/DMAc) has been used to characterize the molar massdistributions (MMD) of wood polymers in pulp fibers afterchemical degradation.</p><p>Characterization of birch kraft pulps subjected to ozonedegradation and acid hydrolysis, respectively, rendereddifferent changes in the MMD. Ozone degradation resulted inlarge redistributions of the original MMD, observed as thedevelopment of a distinct fraction of cellulose withintermediate molar mass. Acid hydrolysis resulted in mino

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31

Hooshmand, Saleh. "Process and properties of continuous fibers based on cellulose nanocrystals and nanofibers." Licentiate thesis, Luleå tekniska universitet, Materialvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26721.

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In recent years, composites made from natural fibers based on cellulose have received increasing attention since they have a low environmental impact and good mechanical properties. However, these fibers are short and discontinuous and the conventional spinning techniques used for these fibers results in continuous yarns with mechanical properties considerably lower than that of the single fibers. The aim of this work was to prepare continuous fibers where nano-sized cellulose crystals and cellulose nanofibers were used to improve the fiber properties. Two different strategies have been used t

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32

Shah, Anal Shirish. "The effect of fixed film pretreatment on activated sludge stability during the treatment of cellulose acetate wastewater." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-05092009-040748/.

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33

Maccow, Awilda. "A chemo-enzymatic approach to expand the chemical space of cellulose-derived materials : Application to eco-friendly dyeing of cellulosic fibers." Electronic Thesis or Diss., Toulouse, INSA, 2022. http://www.theses.fr/2022ISAT0054.

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L'extension de l'espace moléculaire chimique accessible à partir de la biomasse végétale par des méthodes douces et propres est un sujet d'actualité qui stimule la communauté scientifique afin de développer des produits biosourcés à faible impact environnemental et d'élargir le champ d'exploitation de la biomasse. La fonctionnalisation de la cellulose, le polysaccharide le plus abondant sur la planète, et/ou des cello-oligosaccharides telle que décrite dans cette thèse s'inscrit dans cette démarche. Notre objectif était de développer une méthode chimio-enzymatique impliquant l'action d'une lac

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Del, Río De Vicente José Ignacio. "Cellulose nanocrystals functionalized cellulose acetate electrospun membranes for adsorption and separation of nanosized particles." Thesis, Luleå tekniska universitet, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85516.

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Filtration and separation technologies remain as one of the biggest challenges humanity currently faces. The separation of different elements such as bacteria, viruses, heavy metals, particles, and chemical agents require the development of multifunctional membranes. In membrane technology, one of the most promising fabrication techniques is electrospinning, which can produce highly tailored non-woven fibrous multifunctional membranes with a high surface area. On the other hand, cellulose derivatives, like cellulose acetate, have many beneficial properties for filtering technology such as high

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Cheah, Peh Yean. "The DNA-damaging effect of bile acids and the protective effect of cellulose." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184639.

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Colon cancer is the second most common type of cancer in the United States. Its incidence is linked epidemiologically to high levels of bile acids in the feces. Bile acids have been implicated as promotors and cocarcinogens in the etiology of colon cancer and as comutagens and mutagens in bacteria. These observations suggest the hypothesis that bile acids may interact directly with DNA. Using agarose gel electrophoresis we showed that bile acids convert covalently closed circular plasmid DNA to the open circular form, indicating strand breakage. We next treated the single stranded circular DNA

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Balu, Balamurali. "Plasma processing of cellulose surfaces and their interactions with fluids." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31675.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Breedveld, Victor; Committee Chair: Hess, Dennis; Committee Member: Aidun, Cyrus; Committee Member: Deng, Yulin; Committee Member: Singh, Preet. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Sedlachek, Kelly M. "The effect of hemicelluloses and cyclic humidity on the creep of single fibers." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/5802.

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Lembré, Pierre. "Contribution à l’étude de l’organisation et des propriétés mécaniques d’exopolymères de matrice de biofilms modèles." Thesis, Cergy-Pontoise, 2012. http://www.theses.fr/2012CERG0612/document.

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Les biofilms sont des édifices macromoléculaires qui résultent de l'adhérence de microorganismes à une surface. Ils sont constitués de cellules enchâssées dans un réseau d'exopolymères d'origine biologique qui forment une matrice extracellulaire. Les biofilms posent des problèmes technologiques et sanitaires dans de nombreux domaines, aussi bien agroalimentaire, médical, ou industriel. Comprendre les mécanismes de formation de ces structures est donc un enjeu majeur. Malgré une grande diversité de la structure des biofilms, de grands principes semblent en régir la composition. Ainsi, la présen

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Ausmees, Nora. "Structure and function of cellulose fibers and lectins in Rhizobium leguminosarum and regulation of their synthesis /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5811-0.pdf.

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Abada, Maria, Elin Fossum, Louise Brandt, and Anton Åkesson. "Property prediction of super-strong nanocellulose fibers." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277118.

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The innovative technology behind production of strong biofilaments involves the process of spinning filaments from nanoparticles extracted from wood. These nanoparticles are called cellulose nanofibrils (CNFs). The spun filaments can have high mechanical properties, rivaling many other plant based materials, and could be an environmentally friendly replacement for many materials in the future such as fabrics and composites. Before mass production might be possible, the optimal dispersion properties must be determined for the intended use, with regard to concentration, method of oxidation (TEMP

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Wang, Ying. "Cellulose fiber dissolution in sodium hydroxide solution at low temperature dissolution kinetics and solubility improvement /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26632.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Deng, Yulin; Committee Member: Banerjee, Sujit; Committee Member: Frederick, James; Committee Member: Hsieh, Jeffery; Committee Member: Ragauskas, Arthur J.. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Ramirez, Magaly Alexandra. "Cellulose Nanocrystals Reinforced Electrospun Poly(lactic acid) Fibers as Potential Scaffold for Bone Tissure Engineering." NCSU, 2010. http://www.lib.ncsu.edu/theses/available/etd-04012010-153822/.

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Poly(lactic acid) / Cellulose Nanocrystals (PLA / CNs) were simultaneously electrospun to fabricate a novel renewable and biocompatible nanocomposite as potential scaffold for bone tissue engineering. CNs were successfully incorporated into the PLA fibers to reinforce the electrospun fiber mat. Thermal, chemical and mechanical analyses were performed to characterize and determine the properties of the scaffold fabricated. Highly porous fibers with fibers diameters in the range of 500-1000 nm were characterized by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Cr

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Maurer, Ronald W. "Competitive Adsorption of Poly(1-vinylpyrrolidone-co-styrene) and Kymene onto Wood Fibers: the Improved Effect of Sequential Adsorption." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14075.

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Non-ionic copolymers, such as poly(1-vinylpyrrolidone-co-styrene), are used in the production of filtration membranes and fibers because of their ability to provide both hydrophilic and hydrophobic character. However, their non-ionic character and solubility in water prevents inexpensive recovery from waste streams. Wood fibers show potential as recovery agents because they are inexpensive, environmentally friendly, and have a large surface area per unit mass (200 m2/g). However, due to the anionic nature of the fiber surface, their adsorptive behavior is often limited to cationic species. We

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Delgado, Ezequiel. "The potential of zwitterionic bonding in paper /." Thesis, Connect to this title online; UW restricted, 1994. http://hdl.handle.net/1773/5549.

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Jabbour, Lara. "Utilisation de procédés papetiers et de fibres cellulosiques pour l'élaboration de batteries Li-ion Elaboration of Li-ion batteries using cellulose fibers and papermaking techniques." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00998372.

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L'objectif du travail décrit dans cette thèse est de développer des batteries Li-ion peu coûteuses, respectueuses de l'environnement, facilement industrialisables et recyclables, tout en utilisant des fibres cellulosiques et un procédé en milieu aqueux. Deux approches ont été adoptées pendant ce travail expérimental. Dans un premier temps, les microfibrilles de cellulose ont été utilisées pour la production d'anodes par un procédé de casting. Puis, une approche papetière a été adoptée. La plupart des travaux expérimentaux se sont focalisés sur l'utilisation de fibres de cellulose pour la produ

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46

Crow, Roger D. "The influence of aluminum salts on the adsorption of cationic polyelectrolyte by cellulosic fibers." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/5752.

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Santos, Rachel Passos de Oliveira. "Valorização de biomassa lignocelulósica e de polímero reciclado: materiais preparados a partir da eletrofiação de PET, fibra de sisal e seus componentes majoritários." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-04082017-094524/.

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O objetivo do presente estudo foi agregar valor a fibras de sisal, a dois dos componentes principais de fibras lignocelulósicas (celulose e lignina) e a PET reciclado, via produção de materiais com elevado valor agregado. Neste contexto, foram investigadas condições que levassem a mats constituídos por nanofibras/fibras ultrafinas, alinhadas (coletor rotativo) e não alinhadas (coletor estático), a partir da eletrofiação de soluções contendo essas matérias-primas, combinadas ou não [PET/sisal, PET/celulose e/ou lignina, PET/CNC (combinado ou não com OM)], em TFA. Parâmetros de solução, como raz

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Shin, Heungsop. "Identification and characterization of the UDP-glucose-binding polypeptides associated with [beta]-glucan synthase activities from cotton fibers /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Al-Maqdasi, Zainab. "Development of Constituents for Multi-functional Composites Reinforced with Cellulosic Fibers." Licentiate thesis, Luleå tekniska universitet, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73736.

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Bio-basedcomposites are being increasingly used in applications where weight saving,and environmental friendliness is as important as structural performance. Obviously, bio-based materials have their limitations regarding durability and stability of the properties,but their potential in use for advanced applications can be expanded if they were functionalized and considered beyond their structural performance. Multifunctionalityincomposites can be achieved by modifyingeither of the composite constituents at different levelsso that they can perform energy-associated roles besides their structur

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Gutiérrez, Miguel Chávez. "Biocompósitos de acetato de celulose e fibras curtas de Curauá." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248795.

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Orientadores: Maria Isabel Felisberti, Marco-Aurelio De Paoli<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-18T14:10:14Z (GMT). No. of bitstreams: 1 Gutierrez_MiguelChavez_D.pdf: 7288460 bytes, checksum: bbbd520c11973e6ce92e1852b824c208 (MD5) Previous issue date: 2011<br>Resumo: Neste trabalho foram desenvolvidos biocompósitos baseados em acetato de celulose e fibras curtas de Curauá. Os compósitos foram preparados por extrusão em escala laboratorial e piloto, sendo estudada a influência do processamento, teor de fibras,

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