Sökning: "Fiber- och polymervetenskap"

Visar resultat 1 - 5 av 55 avhandlingar innehållade orden Fiber- och polymervetenskap.

  1. 1. Image-based quantitative infrared analysis and microparticle characterisation for pulp and paper applications

    Författare :Kari Hyll; Lars Mattsson; Hannes Vomhoff; Samuel Schabel; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metrology; stock; papermaking; refining; fibrillation; fines; filler; morphology; classification; flow microscopy; fibre analyser; flow cytometry; laser diffraction; dynamic image analysis; process variation; thermography; emittance; emissivity; infrared; MWIR; LWIR; goniometer; Production Engineering; Industriell produktion; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Measurements of process variations and particle morphology are widely employed in the pulp and paper industry. Two techniques with high potential, infrared thermography and microparticle characterisation, are mainly used qualitatively. LÄS MER

  2. 2. Biocomposites Based on Core-Shell Cellulose Nanofibers Preparation, Structure, and Properties

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Kasinee Prakobna; Lars Berglund; David Plackett; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biocomposites; cellulose nanofibers; polysaccharides; holocellulose; nanostructure; dispersion; mechanical properties; hygromechanical properties; moisture stability; film; porous material; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Cellulose nanofibers (CNFs) are of interest as load-bearing components for polymer matrix nanocomposites. A wide range of nanostructured materials including nanopaper/films, foams, aerogels, and hydrogels can be prepared from CNFs. The material performance can be fine-tuned when CNFs are combined with different polymer matrices. LÄS MER

  3. 3. Cellulose–Assisted Dispersion of Carbon Nanotubes : From Colloids to Composites

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Alireza Hajian; Lars Berglund; Milo Shaffer; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nanocelluloses; Carbon nanotubes; Composites; Colloids; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : It is a challenge to disperse nanoparticles to obtain a nanostructured composite. This thesis aims at providing a new route to fabricate carbon nanotube (CNT) composites and suggests mechanisms for nanocellulose–CNT interactions. This route is based on unmodified CNT dispersed in water with the help of nanocellulose. LÄS MER

  4. 4. Carbon fibres from lignin-cellulose precursors

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Andreas Bengtsson; Monica Ek; Jim Parkås; Daniel Söderberg; [2019]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbon fibre; Kraft lignin; Cellulose; Dry-jet wet spinning; Kolfiber; Sulfatlignin; Cellulosa; Våtspinning; Luftgapsspinning; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : It is in the nature of the human species to find solutions of complex technical problems and always strive for improvements. The development of new materials is not an exception. One of the many man-made materials is carbon fibre (CF). LÄS MER

  5. 5. Preparation and characterization of nanoporous cellulose fibres and their use in new material concepts

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Anna Sjöstedt; Lars Wågberg; Akira Isogai; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : The overall objective of the work in this thesis is to better utilize the non-collapsed structure of the delignified wood-fibre cell wall in the preparation of new types of materials.In order to utilize the fibres in new materials, it is crucial to have a well-defined starting material and to know how it reacts to certain treatments of the fibres. LÄS MER