Search for dissertations about: "Cotton linters"

Showing result 1 - 5 of 7 swedish dissertations containing the words Cotton linters.

  2. 1. Recycling of cotton textiles: Characterization, pretreatment, and purification

    Author : Anna Palme; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrolysis; Cellulose; Cotton; Textile recycling; Polycotton; Pretreatment;

    Abstract : In many parts of the world, there are well-established systems for material recycling of metal, glass, and paper. However, no large-scale chemical recycling of textiles currently exists. READ MORE

  4. 2. Chemical Functionalization and Characterization of Cellulosic Materials

    Author : Hanna de la Motte; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Nuclear magnetic resonance; Crosslinking; High bulk networks; Cotton linters; Cationization; Nanocrystalline cellulose; Softwood kraft pulp; Characterization;

    Abstract : Polysaccharides are the most abundant biopolymers produced in nature and belong, together with proteins and nucleic acids, to the main components of life. Polysaccharides are polyhydroxylic polymers that can be functionalized by a wide selection of chemical reactions, and modifications of these biopolymers are applicable in the development of new materials. READ MORE

  5. 3. The inter- and intramolecular selectivity of the carbonate radical anion in its reactions with lignin and carbohydrates

    Author : Magnus Carlsson; KTH; []
    Keywords : ;

    Abstract : In the present thesis, the effects of the carbonate radicalanion on lignin and cellulose were investigated.Kinetic measurements by pulse -radiolysis were performed tostudy the reactions of simple lignin and cellulose models withthe carbonate radical anion. READ MORE

  6. 4. Free radical mediated cellulose degradation

    Author : Erik Johansson; KTH; []
    Keywords : free radicals; cellulose; polymer; average chain length; bleaching; TCF; ozone; degradation;

    Abstract : This thesis addresses the mechanisms involved in cellulosedegradation in general and Totally Chlorine Free (TCF) bleachingof pulp in particular. The thesis shows that the cellulosedegradation during high consistency ozone bleaching is explainedby free radical chain reactions. READ MORE

  7. 5. Structural Elements in Native Celluloses

    Author : Kristina Wickholm; KTH; []
    Keywords : cellulose I; accessible fibril surfaces; inaccessible fibril surfaces; para-crystalline cellulose; fibril aggregates; CP MAS 13C-NMR spectroscopy; spectral fitting; PCA; PLS;

    Abstract : In this thesis, a schematic model for the structure ofaggregated cellulose I fibrils is proposed. The model consistsof a crystalline fibril core surrounded by less orderedcellulose forms. These cellulose forms are fibril surfacesaccessible to water, fibril surfaces inaccessible to water andpara-crystalline cellulose. READ MORE