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Dissertations / Theses on the topic 'Thermo-wood'

Author: Grafiati
Published: 10 March 2023
Last updated: 31 July 2025

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1

Skyba, Oleksandr. "Durability and physical properties of thermo-hygro-mechanically (THM)-densified wood /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17855.

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2

Mecca, Marisabel. "Effect of thermo wood modification and polyoxometalates catalysts on yield and extractives composition." Doctoral thesis, Universita degli studi di Salerno, 2019. http://elea.unisa.it:8080/xmlui/handle/10556/4263.

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2017 - 2018<br>The aims of this work were to investigate the impact of the heat treatment on the chemical composition (holocellulose, lignin and extractives) of different wood species, to characterise and quantify wood extractives and their composition by GC-MS analysis, to explore the effect of thermo vacuum process on the extractives content and composition, and to use molybdenum catalysts in order to increase the amount of recoverable extractives. The results showed that there was an increase in the amount of lignin and extractives, and a decrease in the amount of holocellulose follo
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3

Bhattacharjee, Sujal. "Impact of Recycling on the Mechanical and Thermo-Mechanical Properties of Wood Flour/High Density Polyethylene and Wood Flour/Poly Lactic Acid Composites." Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/28285.

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This research concentrates on the recyclability of two wood plastic composites (WPCs) - wood flour/HDPE and wood flour/PLA composites. Two different filler loadings (30 and 50 wt%) were considered for each polymer composite. Each composite formulation contained 3 wt% of a coupling agent, and was individually recycled up to six times by extrusion process. Samples for mechanical and thermo-mechanical tests were prepared by injection molding. All test results were statistically analyzed with a confidence level of 95%. Additional tests such as fiber length measurement, GPC, DSC, TGA, FTIR, and SEM
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4

Froidevaux, Julien. "Wood and paint layers aging and risk analysis of ancient panel painting." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20032/document.

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Les anciennes peintures sur bois représentent une part importante du patrimoine culturel européen. Depuis longtemps, il est connu que les conditions de stockage peuvent entraîner des dégradations et endommagements aux panneaux. Une bonne compréhension de l'état actuel des peintures sur bois ainsi que la prédiction de leur comportement dans diverses conditions climatiques est essentielle pour mieux les conserver et les restaurer. De telles analyses peuvent être faites par le biais de la modélisation numérique. Cependant, la modélisation numérique est efficace que si les paramètres des matériaux
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5

Akkaoui, Abdessamad. "Bétons de granulats de bois : étude expérimentale et théorique des propriétés thermo-hydro-mécaniques par des approches multi-échelles." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1169/document.

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Les bétons végétaux, composés de particules végétales et d'un liant minéral ou organique, constituent une solution à explorer pour limiter l'impact environnemental du bâtiment. Utilisés principalement pour leurs performances thermiques, ces matériaux suscitent l'intérêt de plusieurs organismes de recherche ainsi que de plusieurs entreprises industrielles. La généralisation de leur utilisation dans la construction ne sera pas possible sans résoudre certains problèmes liés à leurs techniques de mise en œuvre, à leur certification et à leur durabilité. Le présent travail a pour objectif de contri
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6

Hamada, Joël. "Effet de la variabilité intra et interspécifique du bois sur les procédés de traitement thermique." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0254/document.

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Dans le contexte du développement durable qui a vu l’introduction de la directive produits biocides BPD 98/8/CE, l’étude des méthodes innovantes de préservation du bois comme le traitement thermique revêt une importance prépondérante. Le traitement thermique du bois permet d’améliorer ses propriétés de résistance biologique, de stabilité dimensionnelle ainsi que son aspect esthétique, sans ajout de produit chimique. Les études actuelles sur la problématique de la qualité du bois traité thermiquement se focalisent sur les caractéristiques finales du bois déjà traité, l’influence des conditions
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7

Archila, Santos Hector Fabio. "Thermo-hydro-mechanically modified cross-laminated Guadua-bamboo panels." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675700.

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Guadua angustifolia Kunth (Guadua) is a bamboo species native to South and Central America that has been widely used for structural applications in small and large-scale buildings, bridges and temporary structures. Currently, its structural use is regulated within seismic resistant building codes in countries such as Peru and Colombia. Nevertheless, Guadua remains a material for vernacular construction associated with high levels of manual labour and structural unpredictability. Guadua buildings are limited to two storeys due to the overall flexibility of the slender and hollow culms and its c
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8

Gade, Prabhavathi. "Investigation of Volatile Products from Wood Pyrolysis." TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/1076.

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In this research we are following the thermo-chemical degradation of wood in the absence of oxygen. The objectives are to evaluate the influence of heating rates on pyrolysis products obtained from wood pyrolysis and to evaluate the influence of acid pre-treatment on pyrolysis products. Depending on the wood heating rates, pyrolysis can be categorized as Flash pyrolysis, Fast pyrolysis, and Slow pyrolysis. We have evaluated the volatile products obtained at different heating rates and the volatile products obtained from sulfuric acid pre-treatment by using gas chromatography- mass spectrometry
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9

Tita, Bertrand Asongwe. "Waste-to-Energy : A study on Reaction Kinetics of Tropical Wood Sawdust." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-9746.

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The reaction kinetics of Iroko and Mahogany were studied using TGA. The pyrolysis process was achieved using six different heating rates of 2,5,8,12,15 and 20˚C. A 15˚C/min heating rate was used for gasification in steam at different temperatures while varying the concentrations of nitrogen and steam in the process. The kinetic parameters, activation energy and pre exponential factor, were obtained by implementing two chosen kinetic models. These models are: Friedman’s Iso-conversional Method, Flynn-Wall-Ozawa Method (FWO). There were substantial differences in the values of the kinetic triple
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10

Ouarzki, Imane. "Production de bio-huile par pyrolyse de bois : application à la pré-séparation de la bio-huile." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2194.

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Cette étude porte sur la production des bio-huiles à partir de la pyrolyse de bois de hêtre et celui du pin représentant respectivement les bois durs et les bois tendres. Afin de répondre à la problématique liée à la séparation des composés chimique de valeur ajoutée de la bio-huile,une étude a été effectuée sur la faisabilité d’une pré-séparation des constituants chimiques de la bio-huile à l’aide d’une pyrolyse étagée en température dans un réacteur en lit fixe de sorte à cibler la thermo-décomposition sélective des macro-composants de la biomasse (hémicellulose, cellulose et lignine). L’ide
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11

Elias, Robert M. "The chemical reactivity of thermo mechanical pulp (TMP) fibres : a detailed kinetic study of the reaction between fibre and isolated fractions of hollcellulose and cellulose with succinic anhydride." Thesis, Bangor University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239884.

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12

Mårtensson, Tomas. "Application of enzymes for pre-treatment of wood chips for energy efficient thermomechanical pulping." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-77463.

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Thermomechanical pulping (TMP) is a highly energy intensive process where most of the energy is used in therefining of chips to fibres. Various ways of reducing the energy consumption have earlier been studied, for examplechange of refiner pattern, addition of various chemicals, and also some biochemical implementation in the form of fungus and enzymes. This study includes pre-trials with the enzymes pectin lyase and pectin esterase,multipectinase, xylanase, and mannanase. The results are studied via a reducing sugar assay, an enzymatic assayusing spectrophotometry, and capillary zone electrop
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13

Ren, Shan. "Thermo-hygro rheological behavior of materials used in the manufacture of wood-based composites /." 1991. http://hdl.handle.net/1957/9228.

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14

Singh, S. "Recovery of wood extractives by flotation." Thesis, 2019. https://eprints.utas.edu.au/34570/1/Singh_whole_thesis.pdf.

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Wood extractives from softwood species include resin acids, fatty acids and triglycerides. Their water repellency, adhesive properties and biological activity make them useful in manufacturing, agriculture and medicine with broader applications expected to be developed in the future with a shift toward renewable resources. These wood extractives can be problematic in paper manufacture as they cause deposits on machinery and in the paper products, which requires higher levels of maintenance, limits water recycling, increases wastewater toxicity and can reduce product quality. Current methods fo
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15

Duport, Nicolas. "Étude de la stabilité dimensionnelle d'un revêtement polymère sur placage de bois pour structures intérieures d'avions." Thèse, 2016. http://hdl.handle.net/1866/19906.

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16

Sadare, Olawumi Oluwafolakemi. "Preparation, characterization and performance evaluation of Nanocomposite SoyProtein/Carbon Nanotubes (Soy/CNTs) from Soy Protein Isolate." Diss., 2015. http://hdl.handle.net/10500/20179.

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Formaldehyde-based adhesives have been reported to be detrimental to health. Petrochemical-based adhesives are non-renewable, limited and costly. Therefore, the improvement of environmental-friendly adhesive from natural agricultural products has awakened noteworthy attention. A novel adhesive for wood application was successfully prepared with enhanced shear strength and water resistance. The Fourier transmform infrared spectra showed the surface functionalities of the functionalized carbon nanotubes (FCNTs) and soy protein isolate nanocomposite adhesive. The attachment of carboxylic functio
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17

Sandeep, Kumar. "Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/3144.

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The present work focuses on the study of biomass gasification process for generating hydrogen rich synthetic gas with oxy-steam as reactants using experiments and modeling studies. Utilization of the syngas as a fuel in general applications like fuel cells, Fischer-Tropsch FT) process and production of various chemicals like DME, etc. are being considered to meet the demand for clean energy. This study comprises of experiments using an open top down draft reactor with oxygen and steam as reactants in the co-current configuration. Apart from the standard gasification performance evaluation; pa
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18

Sandeep, Kumar. "Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass." Thesis, 2016. http://hdl.handle.net/2005/3144.

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The present work focuses on the study of biomass gasification process for generating hydrogen rich synthetic gas with oxy-steam as reactants using experiments and modeling studies. Utilization of the syngas as a fuel in general applications like fuel cells, Fischer-Tropsch FT) process and production of various chemicals like DME, etc. are being considered to meet the demand for clean energy. This study comprises of experiments using an open top down draft reactor with oxygen and steam as reactants in the co-current configuration. Apart from the standard gasification performance evaluation; pa
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