Fabrication and properties of peroxide cellulose from coniferous and deciduous wood for chemical processing
| Autor: | R. Z. Pen, I. L. Shapiro, O. A. Kolmakova, A. V. Byvshev |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Materials science General Chemical Engineering Environmental pollution General Chemistry Polymer Pulp and paper industry Peroxide chemistry.chemical_compound Deciduous chemistry General Materials Science Cellulose Composite material Sulfate Mass fraction |
| Zdroj: | Fibre Chemistry. 38:32-36 |
| ISSN: | 1573-8493 0015-0541 |
| Popis: | Acid prehydrolysis does not impede subsequent peroxide delignification, increases the mass fraction of α-cellulose, and improves the reactivity of cellulose but does not ensure a high degree of modification. Aqueous prehydrolysis is less effective. Cold alkaline modification of coniferous (spruce) prehydrolysis peroxide cellulose is highly effective and increases the mass fraction of α-cellulose to 97.5%. Deciduous wood is delignified and modified more easily than coniferous wood. Deciduous (birch) cellulose with up to 99% mass fraction of α-cellulose can be obtained by peroxide cooking with acid prehydrolysis, finishing, and cold alkaline modification. The process regimes developed allow processing highly modified coniferous and deciduous cellulose with properties as good as sulfate cord cellulose with minimal technogenic environmental pollution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|