Sökning: "cellulosa nanofibriller CNF"

Hittade 4 uppsatser innehållade orden cellulosa nanofibriller CNF.

  1. 1. 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

  3. 2. 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

  4. 3. Dewatering Cellulose Nanofibril Suspensions through Centrifugation

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Jennifer Astorsdotter; [2017]
    Nyckelord :Cellulose nanofibrils; Microfibrilated cellulose; Centrifugation; Dewatering; Fiber suspension; Cellulosa nanofibriller; CNF; Microfibrilerad cellulosa; MFC; Centrifugering; Avvattning; Fibersuspension.;

    Sammanfattning : Cellulose nanofibrils (CNF) is a renewable material with unique strength properties. A difficulty in CNF production is that CNF suspensions contain large amounts of water. If CNF suspension volume can be decreased by dewatering facilitated by centrifugation, then transportation costs and storage costs can be reduced. LÄS MER

  5. 4. Rotational Diffusion of Cellulose Nanofibrils.

    Kandidat-uppsats, KTH/Mekanik

    Författare :Johan Wärnegård; William Hedén; [2014]
    Nyckelord :;

    Sammanfattning : Cellulose nanofibrils, CNF, is a technical term for the smallest crystalline constituents of wood. Namely particles of cylindrical shape measuring 20-40 nm in diameter and 1-2 um in length. These fibrils display high ultimate tensile strength and a Young's modulus comparable to Kevlar. LÄS MER