Sökning: "cellulose ether"
Visar resultat 1 - 5 av 18 avhandlingar innehållade orden cellulose ether.
- Detta är en avhandling från Umeå : Umeå universitet
Sammanfattning : Mercerisation of cellulose pulp with a solution of NaOH is the first step of manufacturing cellulose-based value-added products, e.g. viscose fibres and cellulose ethers. During this process, cellulose transforms into a swollen crystalline structure, alkali cellulose (Na-Cell). LÄS MER
2. Characterization of cellulose pulps and the influence of their properties on the process and production of viscose and cellulose ethersDetta är en avhandling från Umeå : Umeå Universitet
Sammanfattning : Today’s market offers an ever-increasing range of cellulose pulps (derivative pulps) made fromvarious wood types through different delignification processes. Each pulp segment has its uniquecharacteristics, which makes it difficult for the producer of cellulose derivatives to choose the mostsuitable pulp for optimum processability and product quality. LÄS MER
- Detta är en avhandling från Analytical Chemistry, Lund University
Sammanfattning : Cellulose based derivatives, such as cellulose ethers, today find many applications in a diverse range of fields. The numerous applications put high demands on the technological performance of the cellulose ethers. LÄS MER
- Detta är en avhandling från Karlstad : Karlstad University
Sammanfattning : Carboxymethyl cellulose (CMC) is produced commercially in a two-stage process consisting of a mercerization stage, where the pulp is treated with alkali in a water alcohol solution, followed by an etherification stage in which monochloroacetic acid is added to the pulp slurry. In this thesis an extended mercerization stage of a spruce ether pulp was investigated where the parameters studied were the ratio of cellulose I and II, concentration of alkali, temperature and retention time. LÄS MER
- Detta är en avhandling från Stockholm : KTH
Sammanfattning : The potential use of renewable, bio-based polymers in high-technological applications has attracted great interest due to increased environmental concern. Cellulose is the most abundant biopolymer resource in the world, and it has great potential to be modified to suit new application areas. LÄS MER