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Tesi sul tema "Cellulose"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Ravachol, Julie. "Rôle des glycosides hydrolases de famille 9 dans la dégradation de la cellulose et exploration du catabolisme de xyloglucane chez Ruminiclostridium cellulolyticum." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4054.

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Abstract (sommario):
R. cellulolyticum est une bactérie mésophile, anaérobie stricte et cellulolytique, qui sécrète des macro-complexes multienzymatiques (cellulosomes) très performants dans la dégradation des polysaccharides de la paroi végétale. Les Glycoside Hydrolases de famille 9 (GH9) sont toujours surreprésentées chez les bactéries à cellulosomes. Le génome de R. cellulolyticum code 13 GH9 dont 12 participent aux cellulosomes. Mon travail de thèse a consisté à étudier l’ensemble des GH9 de R. cellulolyticum, en déterminant leurs activités à l’état libre et en complexes, afin d’élucider leurs rôles dans la d
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2

Cervin, Nicholas. "Porous Cellulose Materials from Nano Fibrillated Cellulose." Licentiate thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104196.

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In the first part of this work a novel type of low-density, sponge-like material for the separation of mixtures of oil and water has been prepared by vapour deposition of hydrophobic silanes on ultra-porous nanocellulose aerogels. To achieve this, a highly porous (> 99 %) nanocellulose aerogel with high structural flexibility and robustness is first formed by freeze-drying an aqueous dispersion of the nanocellulose. The density, pore size distribution and wetting properties of the aerogel can be tuned by selecting the concentration of the nanocellulose dispersion before freeze-drying. The h
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3

Peri, Suma Lee Yoon Y. "Kinetic investigation and modeling of cellulase enzyme using non-crystalline cellulose and cello-oligosaccharides." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/PERI_SUMA_47.pdf.

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4

Mokatse, Khomotso. "Production, characterization and evaluation of fungal cellulases for effective digestion of cellulose." Thesis, University of Limpopo (Turfloop Campus), 2013. http://hdl.handle.net/10386/1129.

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Thesis (M.Sc. (Microbiology)) --University of Limpopo, 2013<br>The production of cellulase is a key factor in the hydrolysis of cellulosic materials and it is essential to make the process economically viable. Cellulases are the most studied multi- enzyme complex and comprise of endo-glucanases (EG), cellobiohydrolases (CBH) and β- glucosidases (BGL). The complete cellulase system; comprising CBH, EG and BGL components thus acts synergistically to convert crystalline cellulose to glucose. Cellulases are currently the third largest industrial enzyme worldwide. This is due to their wide applicat
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5

Schult, Tove. "Properties of acid sulfite cellulose for cellulose derivatives." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemical Engineering, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1508.

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6

Linder, Markus. "Structure-function relationships in fungal cellulose-binding domains /." Espoo, Finland : VTT, Technical Research Centre of Finland, 1996. http://www.vtt.fi/inf/pdf/publications/1996/P294.pdf.

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7

Gal, Laurent. "Etude du cellulosome de Clostridium cellulolyticum et de l'un de ses composants : la cellulase CelG." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11071.

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Abstract (sommario):
Le cellulosome de la bacterie cellulolytique clostridium cellulolyticum atcc 35319 a ete etudie. C'est un complexe de 600 kda, en moyenne, qui degrade efficacement la cellulose cristalline. Il est constitue de plusieurs proteines de masse moleculaire relative variant entre 170 et 30 kda. L'utilisation du minicipc1 biotinyle a permis de montrer qu'au moins treize d'entre elles possedaient une dockerine. Parmi celles-ci, les proteines cela, celc, cele, celf et celg, dont les genes sont clones et sequences, ont ete identifiees. Afin de rechercher de nouveaux genes cel codant pour des proteines po
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8

Lane, J. M. "Solid state NMR studies of cellulose and cellulose acetate." Thesis, University of East Anglia, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374690.

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9

Hu, Gang. "Adsorpton and Activity of Cellulase Enzymes on Various of Cellulose Substrates." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-04222009-234535/.

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Abstract (sommario):
The objective of this research is to understand the interfacial behavior of cellulase enzymes and its effect on cellulose hydrolysis. This research began with an in-situ monitoring of cellulose hydrolysis using a piezoelectric based quartz crystal microbalance. The time-course kinetics was modeled using a dose response model. The adsorption indicated by the frequency drop followed a Langmuir model as cellulase enzyme increased. Another important part of this research is the development of a new cellulase activity assay based on the piezoelectric technique. This assay provides an easier and mor
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10

Qian, Chen. "Adsorption of Xyloglucan onto Cellulose and Cellulase onto Self-assembled Monolayers." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42496.

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Adsorption of xyloglucan (XG) onto thin desulfated nanocrystalline cellulose (DNC) films was studied by surface plasmon resonance spectroscopy (SPR), quartz crystal microbalance with dissipation monitoring (QCM-D), and atomic force microscopy (AFM) measurements. These studies were compared to adsorption studies of XG onto thin sulfated nanocrystalline cellulose (SNC) films and regenerated cellulose (RC) films performed by others. Collectively, these studies show the accessible surface area is the key factor for the differences in surface concentrations observed for XG adsorbed onto the three c
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11

Du, Plessis Lisa. "Co-expression of cellulase genes in Saccharomyces cerevisiae for cellulose degradation." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1818.

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12

Tahara, Naoki. "STUDIES ON CELLULASES IN A CELLULOSE-PRODUCING BACTERIUM, ACETOBACTER XYLINUM." Kyoto University, 1998. http://hdl.handle.net/2433/182416.

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13

Tchunden, Jeannette. "Cellulolyse Anaérobie Mésophile : étude de l'amélioration de la production de cellulases par Cl. cellulolyticum ATCC 35319." Nancy 1, 1990. http://docnum.univ-lorraine.fr/public/SCD_T_1990_0044_TCHUNDEN.pdf.

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Abstract (sommario):
Cl. Cellulolyticum est une bactérie cellulolytique mésophile isolée au laboratoire à partir d'herbes en décomposition. Cette bactérie est capable de dégrader la cellulose en une seule étape en acides organiques et en éthanol. Mais l'activité cellulolytique de la souche reste faible. Pour arriver à une possibilité d'utilisation industrielle de la bactérie, les performances cellulolytiques de la souche doivent être améliorées. L'amélioration de la production de cellulases par cl. Cellulolyticum passe à la fois par l'amélioration de ses conditions de culture et l'amélioration de la souche. Ainsi
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14

Meng, Xianzhi. "Assessing the effect of pretreatment on cellulose accessibility for cellulosic biofuels production." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54347.

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Abstract (sommario):
Biomass recalcitrance has been recognized as one of the major barriers that hided the cost-effective conversion of lignocellulosic biomass to bioethanol, therefore the current bioconversion process require an essential step known as pretreatment to increase the cellulose accessibility. This thesis provides information about changes in cellulose accessibility upon different pretreatments, along with how these pretreatments alter the chemical and physical structures of biomass, will be extremely helpful to further optimize the current pretreatment process. Multiple promising analytical technique
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15

Yang, Han. "Investigation and characterization of oxidized cellulose and cellulose nanofiber films." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106551.

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Abstract (sommario):
Over the last two decades, a large amount of research has focused on natural cellulose fibers, since they are "green" and renewable raw materials. Recently, nanomaterials science has attracted wide attention due to the large surface area and unique properties of nanoparticles. Cellulose certainly is becoming an important material in nanomaterials science, with the increasing demand of environmentally friendly materials.In this work, a novel method of preparing cellulose nanofibers (CNF) is being presented. This method contains up to three oxidation steps: periodate, chlorite and TEMPO (2,2,6,6
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16

Mayende, Lungisa. "Isolation of a Clostridium Beijerinckii sLM01 cellulosome and the effect of sulphide on anaerobic digestion." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1004032.

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Abstract (sommario):
Cellulose is the most abundant and the most resistant and stable natural organic compound on earth. Enzyme hydrolysis is difficult because of its insolubility and heterogeneity. Some (anaerobic) microorganisms have overcome this by having a multienzyme system called the cellulosome. The aims of the study were to isolate a mesophilic Clostridium sp. from a biosulphidogenic bioreactor, to purify the cellulosome from this culture, to determine the cellulase and endoglucanase activities using Avicel and carboxymethylcellulose (CMC) as substrates and the dinitrosalicyclic (DNS) method. The organism
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17

Roussos, Sevastianos. "Croissance de Trichoderma harzianum par fermentation en milieu solide : physiologie, sporulation et production de cellulases /." Paris : Ed. de l'ORSTOM, 1987. http://catalogue.bnf.fr/ark:/12148/cb349545941.

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18

El-Turabi, Mohammed El Hassan. "The reactions of cellulose and modified cellulose with amide/formaldehyde resins." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329190.

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19

Arca, Hale Cigdem. "Cellulose Esters and Cellulose Ether Esters for Oral Drug Delivery Systems." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82920.

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Abstract (sommario):
Amorphous solid dispersion (ASD) is a popular method to increase drug solubility and consequently poor drug bioavailability. Cellulose ω-carboxyesters were designed and synthesized specifically for ASD preparations in Edgar lab that can meet the ASD expectations such as high Tg, recrystallization prevention and pH-triggered release due to the free -COOH groups. Rifampicin (Rif), Ritonavir (Rit), Efavirenz (Efa), Etravirine (Etra) and Quercetin (Que) cellulose ester ASDs were investigated in order to increase drug solubility, prevent release at low pH and controlled release of the drug at small
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20

Liang, Jiarong. "Cellulose oxalates in biocomposites." Thesis, KTH, Fiber- och polymerteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297506.

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Under de senaste åren, på grund av överanvändningen av icke förnybara resurser har den ekologiska miljön på jorden påverkats allvarligt. I takt med detta ökade oron bland människor om att resurserna skulle ta slut. Därför är det nödvändigt att utveckla och använda mer miljövänliga förnybara resurser. Ett av dessa alternativ är cellulosabaserat material, vilket är ett utmärkt val. Vanligtvis består cellulosabaserat material av ett förstärkande material (cellulosafiber) och en matris (polymer eller metall). Dock bör kompatibiliteten mellan cellulosamaterialet och polymermatrisen ses över, efters
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21

Nutt, Anu. "Hydrolytic and Oxidative Mechanisms Involved in Cellulose Degradation." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6888.

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22

Ubhayasekera, Wimal. "Structural studies of cellulose and chitin active enzymes /." Uppsala : Dept. of Molecular Biology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200518.pdf.

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23

Astorsdotter, Jennifer. "Dewatering Cellulose Nanofibril Suspensions through Centrifugation." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215079.

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Abstract (sommario):
Cellulose nanofibrils (CNF) is a renewable material with unique strength properties. A difficulty in CNF production is that CNF suspensions contain large amounts of water. If CNF suspension volume can be decreased by dewatering facilitated by centrifugation, then transportation costs and storage costs can be reduced. The aim of this thesis is to investigate the impact various parameters have on CNF centrifugation dewatering and identify optimal conditions for maximal water removal. A laboratory study was conducted using four materials; 2.0 w% enzymatically treated CNF (CNF1), 1.9 w% carboxymet
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24

Bansal, Prabuddha. "Computational and experimental investigation of the enzymatic hydrolysis of cellulose." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42773.

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Abstract (sommario):
The enzymatic hydrolysis of cellulose to glucose by cellulases is one of the major steps in the conversion of lignocellulosic biomass to biofuel. This hydrolysis by cellulases, a heterogeneous reaction, currently suffers from some major limitations, most importantly a dramatic rate slowdown at high degrees of conversion in the case of crystalline cellulose. Various rate-limiting factors were investigated employing experimental as well as computational studies. Cellulose accessibility and the hydrolysable fraction of accessible substrate (a previously undefined and unreported quantity) were sho
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25

Lever, Mitchell. "Cellulose to ethanol conversion with on-site cellulase production using solid-state fermentation." Thesis, Lever, Mitchell (2009) Cellulose to ethanol conversion with on-site cellulase production using solid-state fermentation. PhD thesis, Murdoch University, 2009. https://researchrepository.murdoch.edu.au/id/eprint/32795/.

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Abstract (sommario):
The economics and environmental sustainability of enzymatic lignocellulose-to-ethanol conversion processes are adversely affected by the use of purchased cellulase preparations. Commercial cellulase preparations lack the microorganisms that produce them and thus cannot be cultured on-site, resulting in a significant ongoing expense. Commercial cellulase production is energy intensive and a significant contributor to the overall environmental impact of the cellulose to ethanol conversion process...
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26

D'Amour, Roger. "Modèle réactionnel de la dépolymérisation hydrolytique de la cellulose en cellulose microcristalline." Mémoire, Université de Sherbrooke, 2001. http://savoirs.usherbrooke.ca/handle/11143/1152.

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Cette étude s'inscrit dans une vision globale de valorisation de la biomasse. Concrètement, le Groupe de Recherche sur les Technologies et Procédés de Conversion du département de génie chimique de l'Université de Sherbrooke mise sur la conversion d'hydrates de carbone en sucres fermentescibles aux fins de production de bio éthanol. Ce mémoire est axé sur la conversion de la cellulose en ses unités constitutives, soient les micro cristallites et puis le monomère de glucose. Les mécanismes moyennant lesquels la cellulose se transforme progressivement englobent des transformations structurelles
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27

D'Amour, Roger. "Modèle réactionnel de la dépolymérisation hydrolytique de la cellulose en cellulose microcristalline." Sherbrooke : Université de Sherbrooke, 2001.

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28

Fischer, Martin. "Polymeranaloge Carbanilierung von Cellulose." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1106412216968-39405.

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Abstract (sommario):
Characterization of cellulose by its molecular weight distribution is afforded after polymeranalogeous dissolution. Additionally, a molecular dispersion of the polymer is a prerequisite. Common processes are dissolution of cellulose in dimethylacetamide-lithiumchloride, nitration and carbanilation. Degradation of the polysaccharide chains can occur in each of the mentioned processes. It is shown that degradation in pyridine occurs via beta-elimination at carbonyl groups along the cellulose chains. Carbanilierung in DMSO is much more pronounced. It comprises oxidation along the Pfitzner-Moffatt
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29

Helle, Steve. "Biosurfactants & cellulose hydrolysis." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61308.

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The action of many antimicrobial agents is dependent on their ability to interact with biological membranes. A group of polypeptide antibiotics was found to have surface activite properties. One of them, gramicidinS, produced a minimum in the surface tension curve, which was attributed to instabilities in the intra-molecular hydrogen bonds. Biosurfactants were found to have a great effect on the two phase hydrolysis of cellulose by cellulase. Seven times as much sugar was produced by the hydrolysis of Sigmacell 100 when the biosurfactant sophorolipid was present. The surfactant affects the ads
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30

Symington, Mark C. "Cellulose based composite materials." Thesis, University of Strathclyde, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501684.

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Natural fibre composites are a fast growing research area, with many observable research branches. In this thesis, studies into natural fibre composites are undertaken. This includes work into the base fibre mechanical properties, pre-processing techniques and the influence of alkalisation and silanation, both common fibre processing methods used to improve interfacial properties. The effects of these pre-processing techniques were also evaluated using Fourier transform infrared spectroscopy (FT-IR). It was observed that the processing had shown definite signs of altering the surface functiona
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31

Gandhi, U. P. "Diffusion in cellulose derivatives." Thesis, Cardiff University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376555.

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32

Mao, Rui. "Mechanics of cellulose nanopapers." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24706.

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Abstract (sommario):
Cellulose nanopaper is a fibrous network composed of cellulose nanofibres connected by hydrogen bonds, which shows pronounced mechanical and physical properties. This thesis investigates the mechanics of cellulose nanopaper from various aspects. First, the fracture properties of cellulose nanopaper were investigated using experimental and modelling approaches. It was found that the fracture strength of notched nanopaper is insensitive to notch length. Cohesive zone models were used to describe the fracture behaviour of notched cellulose nanopaper. Fracture energy was extracted from the cohesiv
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33

Joubert, Fanny. "Chemically modified hydroxyethyl cellulose." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/11122/.

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Abstract (sommario):
Synthetic, man-made polymers are produced from petroleum, however this activity may well decrease as a function of time because of the non-renewability of the oil. This will result in the decreased production of synthetic polymers with consequent problems to our everyday life because of their ubiquity (food, furniture, containers, electronics…). An alternative could be the use of biopolymers such as cellulose, starch, proteins, amylose and chitin which are extracted from renewable sources. Cellulose is the most abundant biopolymer on earth and is principally found in the cell walls of plants.
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34

Wilsby, Astrid. "Insight in cellulose degradation." Thesis, KTH, Fiber- och polymerteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302670.

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I strävan efter att minska textilindustrins omfattande miljöpåverkan utvecklas nya metoder för textilåtervinning. Idag återvinns bomullstyg av Renewcell på deras anläggning i Kristinehamn. Den återvunna produkten, Circulose®, är en dissolvingmassa som kan användas för att spinna nya viskosfibrer som man i sin tur kan använda för att göra nya kläder. Föreliggande arbete är en förstudie om möjligheten att optimera Renewcellls återvinningsprocess. Arbetet inkluderar en optimering av massaprocessen vilket resulterar i en mer effektiv process som minskar förbrukningen av processkemikalier.<br>To re
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35

de, Mourgues Marius. "Composite Cellulose Nanofibrils Filaments." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277919.

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Biodegradable polymers are emerging as a new solution to satisfy the increasing demand of greenenvironmentally friendly material. At the same time, the interest for lighter and stronger structures never stops growing. In this paper, we report the production steps to achieve cellulose nanofibrils (CNF) composite filaments via a new green synthesis route known as wet spinning. This new technique avoids the traditional harmful viscose process and produces biodegradable CNF filaments with interesting mechanical properties. This approach is then applied to produce never seen before composite CNF fi
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36

Pillai, Karthik. "Bio-inspired Cellulose Nanocomposites." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/28575.

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Natural composites like wood are scale-integrated structures that range from molecular to the macroscopic scale. Inspired by this design, layer-by-layer (LbL) deposition technique was used to create lignocellulosic composites from isolated wood polymers namely cellulose and lignin, with a lamellar architecture. In the first phase of the study, adsorption of alkali lignin onto cationic surfaces was investigated using a quartz crystal microbalance with dissipation monitoring (QCM-D). Complete coverage of the cationic surface with alkali lignin occured at low solution concentration; large affinit
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37

Inman, Sharon. "Cellulose bilayer tablet interfaces." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11775.

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38

Fugelstad, Johanna. "Cellulose Biosynthesis in Oomycetes." Licentiate thesis, Stockholm : KTH Biotechnology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9282.

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39

Feng, Xianhua Pelton Robert H. "Polyvinylamine carboxymethyl cellulose complexes." *McMaster only, 2006.

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40

Steele, David Fraser. "Amine/microcrystalline cellulose interactions." Thesis, University of Bath, 2002. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275882.

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41

Blell, Rebecca. "Microfibrillated cellulose based nanomaterials." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAE023.

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Abstract (sommario):
La cellulose étant l'un des biopolymères les plus abondants, elle est employée dans ce travail de thèse sous sa forme nano-fibrille (2 à 5nm de diamètre et plusieurs microns de long) pour préparer des nanomatériaux durables. Les microfibrilles de cellulose (MFC) chargées positivement ou négativement sont assemblées en couches minces dans ces nanomatériaux par la méthode « Layer by Layer » (LbL) par trempage, pulvérisation ou spin assisté. Les différences entre ces films LbL à base de MFC et les films LbL à base de polymères standards sont discutées brièvement et sont reliées à la forme nanofib
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42

Seeta, R. "Enzymatic hydrolysis of cellulose." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1987. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3280.

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43

Chakrabarti, Ajoy Chuni Carleton University Dissertation Biology. "One-step conversion of cellulose to fructose using co-immobilized cellulase, B-glucosidase and glucose isomerase." Ottawa, 1988.

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44

Cerclier, Carole. "Films multicouches à base de polymères végétauxβ : élaboration et application à la détection d'activités enzymatiques". Nantes, 2010. http://archive.bu.univ-nantes.fr/pollux/show.action?id=19992f55-8948-4aa3-b33f-69e1bae3bb65.

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Abstract (sommario):
La cellulose et le xyloglucane constituent un réseau majeur de la paroi des cellules végétales. Ces molécules sont liées par des interactions de Van der Waals et des liaisons hydrogène que nous avons mis à profit pour l’élaboration de films multicouches nanométriques. En fonction de leur épaisseur et de leur indice de réfraction, les films nanométriques peuvent présenter des couleurs qui sont dues à des phénomènes d’interférences. De tels films composés de nanocristaux de cellulose et de xyloglucane peuvent être valoriser comme détecteurs d’activité enzymatique de cellulases. En effet, l’actio
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45

Oliveira, Marcelo Miranda de. "Nanostructure variability of cellulose from plants and the impact on cellulose nanocrystals production." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-07112018-101553/.

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This work investigates the compositional and nanostructural variability of celluloses isolated from plants and the impact of the variability in the production of cellulose nanocrystals. A variable set of cellulose isolated from plants were generated starting with a range of feedstocks (coconut fiber, sisal fiber, eucalyptus sawdust, pine sawdust, sugarcane rind and sugarcane pith), applying a range of cellulose isolation processes (acetossolv, liquid hot water, alkaline, and liquid hot water + alkaline) and adding commercial cellulose (eucalyptus kraft pulp, dissolving pulp, and microcrystalli
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46

Xu, Hui. "Genetic Modification of Thermotoga to Degrade Cellulose." Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1430913637.

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47

Ulfstad, Louise. "Rheological study of cellulose dissolved in aqueous ZnCl2 : Regenerated cellulosic fibres for textile applications." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-28781.

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The most known regenerated cellulosic fiber is viscose, produced in a wet spinning process, but due to cost and environmental issues other processes have been developed. Lyocell fibers, produced in air-gap spinning, have superior dry and wet strenght and a lower environmental impact compared to viscose. Research in different cellulose solvent has increased significantly tha last decadess, due to an increased cotton price and a decreased paper production, providing more wood pulp to production of regenerated cellulosic fibers.   Inorganic molten salt hydrates have the ability of dissolving cell
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48

Hogan, Charlene M. "Enzymatic and structural factors limiting hydrolysis of cellulose by Trichoderma harzianum E58 cellulases." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5574.

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49

Falcoz-Vigne, Léa. "Caractérisation et modélisation des interactions cellulose - hémicelluloses au sein des microfibrilles de cellulose (MFC)." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAV091/document.

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Le cadre de cette étude est le coût énergétique lié à la production des Microfibrilles de Cellulose (MFC) qui est aujourd’hui un facteur limitant à son développement à l’échelle industrielle. Le but de cette étude est de caractériser les interactions cellulose/hémicellulose au sein de ces systèmes.Des MFC provenant de différentes pâtes à papier chimiques ont été caractérisées par RMN du solide afin d’obtenir des informations à l’échelle moléculaire. Suite à l’optimisation d’un protocole expérimental, les hémicelluloses contenues dans les MFC issues de pâte kraft de bouleau ont ensuite été extr
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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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