Search for dissertations about: "cellulosa"

Showing result 6 - 10 of 199 swedish dissertations containing the word cellulosa.

  2. 6. Hydrophobization of cellulose for bio-based materials

    Author : Tianxiao Huang; Monica Ek; Merima Hasani; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Betulin; Cellulose; Hydrophobicity; Mechanical properties; Polymer-matrix composites; Sustainability; Textile; Betulin; Cellulosa; Hydrofobicitet; Hållbarhet; Mekaniska egenskaper; Polymer-matriskompositer; Textil; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Cellulosa, vilken är huvudkomponenten i växter förekommer rikligt i naturen, både på land och i havet. Cellulosabaserade material har i tusentals år använts av människan för dagliga förnödenheter som bränsle och konstruktionsmaterial. Cellulosa isolerades först av den franske forskaren Anselme Payen 1838. READ MORE

  4. 7. Light Scattering Effects in Transparent Wood Biocomposites

    Author : Hui Chen; Lars Berglund; Ilya Sychugov; Max Yan; Mikael Sjödahl; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transparent wood; cellulose; biocomposite; light transmission; anisotropic scattering; Rayleigh scattering; photon budget; photon diffusion theory; light-transparent wood interaction; Transparent trä; cellulosa; biokomposit; ljustransmission; anisotropisk spridning; Rayleigh-spridning; fotonbudget; fotondiffusionsteori; ljus-transparent trä interaktion; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Transparent wood (TW) shows interesting optical properties and offers a sustainable alternative to petroleum-based polymer glasses. The influence of the TW internal structure (e.g. READ MORE

  5. 8. Biobased carbon fibers from solution spun lignocellulosic precursors

    Author : Andreas Bengtsson; Monica Ek; Maria Sedin; Elisabet Brännvall; Elisabeth Sjöholm; Johannes Ganster; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Carbon fiber; Carbonization; Cellulose; Kraft pulp; Softwood kraft lignin; Solution spinning; Stabilization; Barrvedslignin; Cellulosa; Karbonisering; Kolfiber; Lösningsmedelsspinning; Stabilisering; Sulfatmassa; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : Carbon fibers (CFs) have excellent mechanical properties and a low density, making themattractive as a reinforcing fiber in composites. The use of CFs is limited to high-end applications,since they are produced from an expensive fossil-based precursor via an energy-intensivemanufacturing process, explaining the need for cheaper CFs from renewables. READ MORE

  6. 9. Cellulose derived carbon dots : From synthesis to evaluation as multifunctional building blocks in biomedical scaffolds

    Author : Nejla Benyahia Erdal; Minna Hakkarainen; Jukka Seppälä; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose; microwave; carbon dots; polycaprolactone; scaffold; mineralization; drug loading; cellulosa; mikrovågor; kolnanopartiklar; polykaprolakton; stödmatris för vävnadsregenerering; mineralisering; läkemedelsbärare; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : The implementation of biobased and biodegradable polymeric materials in biomedical applications is often coupled with issues related to their insufficient mechanical properties or limited bioactivity. In this thesis, a perspective on valorization of biomass is presented, demonstrating the transformation of cellulose into biobased carbon nanomaterials with the potential to serve as multifunctional property enhancers in polycaprolactone (PCL) scaffold materials for tissue engineering. READ MORE

  7. 10. Isoconversional analysis for the prediction of mass-loss rates during pyrolysis of biomass

    Author : Lina Norberg Samuelsson; Matthaus Babler; Rosana Moriana; Henrik Wiinikka; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pyrolysis; biomass; kinetics; cellulose; spruce; black-liquor; model-free; isoconversional; prediction; pyrolys; biomassa; kinetik; cellulosa; gran; svartlut; model-free; isoconversional; förutsägelse; Chemical Engineering; Kemiteknik; Energy Technology; Energiteknik;

    Abstract : Biomass is the only renewable carbon source that can compete with fossil energy sources in terms of production of materials, chemicals and fuels. Biomass can be transformed into charcoal, liquid and gas through pyrolysis, i.e. pure thermal decomposition. READ MORE