Search for dissertations about: "wood pulp fibers"

Showing result 1 - 5 of 46 swedish dissertations containing the words wood pulp fibers.

  2. 1. Engineering of lignin in wood towards functional materials

    Author : Gabriella G. Mastantuoni; Qi Zhou; Lars Berglund; Jean-Marie Raquez; KTH; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cellulose; wood; nanotechnology; sulfonation; biocomposite; cross-linking; densification; transparent film; wood foam; conductivity; Cellulosa; trä; nanoteknologi; sulfonering; biokomposit; tvärbindning; förtätning; transparent film; poröst trämaterial; konduktivitet; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Through 270 million years of evolution, the finely tuned hierarchical structure of wood has been optimized for efficient nutrient transport and exceptional mechanical stability. Its distinctive orthotropic constitution can provide inspiration and design opportunities for the development of novel functional materials. READ MORE

  4. 2. Design of Cellulose-Based Materials via Sustainable and Scalable Processes

    Author : Yunus Can Görür; Lars Wågberg; Per A. Larsson; Tsuguyuki Saito; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Transparent paper; cellulose nanofiber; fibers; CNF; nanofibrillation; nanopaper; functional hybrids; nanocomposites; green materials; energy storage; binders; Transparent papper; cellulosa nanofiber; fibrer; CNF; nanofibrillering; nanopapper; funktionella hybrider; nanokompositer; gröna material; energilagring; bindemedel; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Plastic pollution is one of the most pressing environmental issues in today’s world. Addressing this problem calls for the development of environmentally friendly alternatives that would reduce the amount of persistent plastic waste. READ MORE

  5. 3. Mechanical Pulp. Effects of Pretreatment and Wood Source on Fiber Separation and Pulp Properties

    Author : Lars Johansson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; torsional stress; pulp properties; chips; impregnation; screw press; SEM; mechanical pulp; sulfonation; shear stress; fracture surface; wood quality; temperature;

    Abstract : The work presented in this thesis concerns the mechanical pulping process and the effects of wood source and pretreatment conditions on the pulp properties. In the first part, the deformation of Norway spruce (Picea abies) wood samples was investigated under shear and torsional loading at different temperatures (20-95°C) and sulfonation conditions. READ MORE

  6. 4. Ultrastructural Aspects of Pulp Fibers as Studied by Dynamic FT-IR Spectroscopy

    Author : Margaretha Åkerholm; KTH; []
    Keywords : cellulose; cooperation; crystallinity; dynamic test; glucomannan; hardwood; holocellulose; humidity; infrared spectroscopy; kraft pulp; lignin; mechanical pulp; orientation; polarised light; softwood; strain; sulphite pulp; viscoelasticity; xylan;

    Abstract : Dynamic (or 2D) FT-IR spectroscopy in combination withpolarized IR irradiation has been used in this work to studywood polymer orientation and interactions on theultrastructural level in wood fibers in the native state aswell as the effects of different pulping processes. The woodpolymer interactions were studied under both dry and humidconditions. READ MORE

  7. 5. DIFFUSION OF IONS IN WOOD

    Author : Reddysuresh Kolavali; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lithium chloride; impregnation; diffusion; Norway spruce; local concentration profiles; experimental methodology; micro-cracks; wood; Donnan effect;

    Abstract : Wood sourced from well managed plantations or forests, is a renewable material with many advantages over non-renewable (fossil) material, and also wood lignocelluloses are the only type of biomass that is a seasonal-independent product. In addition to direct utilization as a building material, major uses of wood are currently for making pulp and paper products, and fuel. READ MORE