IONCELL-P&F Pulp Fractionation and Fiber Spinning with Ionic Liquids
| Autor: | Michael Hummel, Anne Michud, Agnes Stepan, Sanna Hellsten, Herbert Sixta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Chromatography
General Chemical Engineering Pulp (paper) 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound Cellulose fiber chemistry Kraft process Chemical engineering Ionic liquid engineering Hemicellulose Cellulose 0210 nano-technology Dissolving pulp Spinning ta215 |
| Zdroj: | INDUSTRIAL AND ENGINEERING CHEMISTRY RESEARCH. 55(29):8225-8233 |
| ISSN: | 0888-5885 |
| Popis: | Both IONCELL-P(ulp) and IONCELL-F(iber) are emerging new cellulose processing technologies utilizing ionic liquids (ILs). IONCELL-P is upgrading paper pulp into dissolving pulp with mixtures of IL and water. IONCELL-F is an IL based cellulose fiber spinning technology. In this work, these two processes were combined using the same ionic liquid, 1,5-diazabicyclo[4.3.0]non-5-ene acetate [DBNH][OAc], in both processes. In the IONCELL-P to achieve dissolving pulp quality cellulose (hemicellulose content below 5%) from birch kraft pulp, different pretreatments and optimization steps, such as targeted enzymatic predegradation of the xylans, preadjusting the viscosity of the pulp, and decreased pulp consistency (2%) in the fractionation, were implemented. From the obtained cellulose fraction containing 4.2% xylan, a dope was prepared from which high tenacity (50 cN/tex) and Young’s modulus (23.6 GPa) fibers were spun with IONCELL-F dry jet wet spinning. The produced fibers surpassed the mechanical properties of ... |
| Databáze: | OpenAIRE |
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