Sökning: "dialdehyde cellulose"

Hittade 4 uppsatser innehållade orden dialdehyde cellulose.

  1. 1. Modified cellulose synthesized by different deep eutectic solvents as an additive in paper making process

    Master-uppsats, Karlstads universitet

    Författare :Shiniar Said Saleh; [2023]
    Nyckelord :green chemistry; dry strength additives; deep eutectic solvents; sodium periodate oxidation; charge density; dewatering; mechanical strength.;

    Sammanfattning : The environmental concerns that come with the currently used traditional papermaking process where petroleum-based additives are used, has tempted researchers to study “green” additives by introducing environmentally friendly modifications of cellulose as an additive in the papermaking process. This thesis will spin further on that by producing additives with different charge densities and focus on to incorporate an etherification reaction into potentially greens systems based on non-toxic and readily biodegradable deep eutectic solvent (DES). LÄS MER

  3. 2. Pulp compositions and their influence on the production of dialcohol cellulose

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Viktoria Carlsson; [2020]
    Nyckelord :;

    Sammanfattning : The characteristics of products made from pulp can be modified through different methods. If the pulp is refined either laboratory or industrially, the fibres in the pulp become more flexible and therefore creates stronger bonds to each other, which results in a final product with a higher strength. LÄS MER

  4. 3. Determination of the Degree of Oxidation in Dialdehyde Cellulose Using Near Infrared Spectroscopy

    Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Avdelningen för kemiteknik

    Författare :Carl-Magnus Brandén; [2017]
    Nyckelord :dialdehyde cellulose; DAC; NIR; periodate oxidation; multivariate analysis; degree of oxidation; dialdehydcellulosa; DAC;

    Sammanfattning : The purpose of this thesis work was to investigate possible in-, on- or at-line methods to determine the degree of oxidation in dialdehyde cellulose. Several technologies were reviewed which led to a feasibility study into a possible on-line or at-line method using near infrared spectroscopy for determining the degree of oxidation in wet dialdehyde cellulose. LÄS MER

  5. 4. Production of Dialdehyde Cellulose and Periodate Regeneration: Towards feasible oxidation processes

    Magister-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper

    Författare :Elisabeth Höglund; [2015]
    Nyckelord :Dialdehyde cellulose; periodate regeneration;

    Sammanfattning : Cellulose is an attractive raw material that has lately become more interesting thanks to its degradability and renewability and the environmental awareness of our society. With the intention to find new material properties and applications, studies on cellulose derivatization have increased. LÄS MER