Sökning: "fiber"

Visar resultat 21 - 25 av 1342 avhandlingar innehållade ordet fiber.

1. 21. Characterization of the carbohydrate composition of pulp fibers

   Författare :Sofia Bjarnestad; KTH; []
   Nyckelord :capillary zone electrophoresis; carbohydrate composition; fiber; fourier transform infrared spectroscopy; ftir;

   Sammanfattning : .... LÄS MER

3. 22. The cell wall ultrastructure of wood fibres : effects of the chemical pulp fibre line

   Författare :Jesper Fahlén; Ulf W. Gedde; Drek G. Gray; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; atomic force microscopy; cellulose; cell wall; drying; fiber; Kemiteknik; Chemical engineering; Kemiteknik;

   Sammanfattning : Knowledge of the ultrastructural arrangement within wood fibres is important for understanding the mechanical properties of the fibres themselves, as well as for understanding and controlling the ultrastructural changes that occur during pulp processing. The object of this work was to explore the use of atomic force microscopy (AFM) in studies of the cell wall ultrastructure and to see how this structure is affected in the kraft pulp fibre line. LÄS MER

4. 23. High-Performance Composites from Modified Wood Fiber

   Författare :Mats Westin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kraft lignin; fiberboard; lignocellulosic fiber; durability; wood fiber; mechanical properties; dimensional stability; decay resistance; acetylation; composite;

   Sammanfattning : The objective of this work was to produce and evaluate high-performance wood fiber composites. High-performance was defined as: high dimensional stability and a high durability, including resistance to wood-decaying organisms (fungi, bacteria, and insects). LÄS MER

5. 24. Fiber-Supported Hydrogels with Controlled surface Properties

   Författare :Jan Karlsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cellulose; fiber; ozone; polypropylene; graft polymerization; hydrogel; surface;

   Sammanfattning : Hydrogels are emerging materials that have the ability to hold a substantial amount of water. However, the low mechanical performance of hydrogels is often a limitation for extending the field of applications. LÄS MER

7. 25. Eco-friendly Holocellulose Materials for Mechanical Performance and Optical Transmittance

   Författare :Xuan Yang; Lars Berglund; Eero Kontturi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Cellulosic materials can be sustainable replacements for fossil-based plastics; yet for some applications improvements are needed for mechanical properties, optical transmittance and eco-friendly characteristics. In this thesis, holocellulose materials are investigated for this purpose, and processing-structure-property relationships are discussed. LÄS MER