Sökning: "TEMPO-oxidation"

Hittade 4 uppsatser innehållade ordet TEMPO-oxidation.

  1. 1. Chemical modification of starch in order to get thermoplastic properties

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Emma Hallbert; Elsa Wadman; [2023]
    Nyckelord :thermoplastic starch; dialdehyde starch; schiff-base; imine chemistry; termoplastisk stärkelse; dialdehydstärkelse; schiffbas; iminkemi;

    Sammanfattning : There are numerous advantages of replacing traditional non-biodegradable synthetic plastics with bio-based plastics. Starch is globally available, cheap, renewable, and biodegradable. However, starch has a poor product performance and is relatively difficult to process, as conventional melt processing techniques cannot be used. LÄS MER

  3. 2. Polymer Directed Engineering of Novel Cellulose Network

    Kandidat-uppsats, KTH/Fiber- och polymerteknologi

    Författare :Christel Gradin; Adina Landström; Julia Szecsödy; [2021]
    Nyckelord :Hydrogel; Carboxylated CNF; TEMPO-oxidation; bis-MPA ammonium dendrimer; Polymer salt bridge; Rheology;

    Sammanfattning : This study investigated a CNF/dendrimer hydrogel and how different concentrations of the carboxylated CNF and bis-MPA ammonium dendrimer affected the hydrogels’ rheological properties. A third generation bis-MPA ammonium dendrimer was diffused into a dispersion of carboxylated cellulose nanofibrils. LÄS MER

  4. 3. Property prediction of super-strong nanocellulose fibers

    Kandidat-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Maria Abada; Elin Fossum; Louise Brandt; Anton Åkesson; [2020]
    Nyckelord :Cellulose nanofibril CNF ; Spinning; Flow-stop; Flow-focusing; Mechanical properties; Carboxymethylation; TEMPO-oxidation;

    Sammanfattning : The innovative technology behind production of strong biofilaments involves the process of spinning filaments from nanoparticles extracted from wood. These nanoparticles are called cellulose nanofibrils (CNFs). LÄS MER

  5. 4. Transparent paper: Evaluation of chemical modification routes to achieve self-fibrillating fibres

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Paulina Sandberg Birgersson; [2020]
    Nyckelord :Transparent paper; nanopaper; nanocellulose; chemical modification of cellulose; cellulose nanofibrils CNF ; Transparent papper; nanopaper; nanocellulosa; kemisk modifiering av cellulosa; cellulosa nanofibriller CNF ; nanopapper;

    Sammanfattning : Transparenta papper tillverkade av cellulosa nanofibriller (CNF), visar stor potential att kunna ersätta petroleumbaserade plaster inom många användningsområden, till exempel för mat- och varuförpackningar. CNF, även känt som nanocellulosa, kombinerar viktiga cellulosaegenskaper, med unika egenskaper hos nanomaterial. LÄS MER