Simultaneous bench scale production of dissolving grade pulp and valuable hemicelluloses from softwood kraft pulp by ionic liquid extraction
| Autor: | Christiane Laine, Ali Harlin, Riku Talja, Sari Asikainen, Agnes Stepan, Herbert Sixta |
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| Rok vydání: | 2016 |
| Předmět: |
Softwood
barrier film Polymers and Plastics 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences chemistry.chemical_compound stomatognathic system Materials Chemistry Hemicellulose Cellulose ta216 Dissolving pulp Galactoglucomannan ta116 ionic liquid modification business.industry Pulp (paper) wood pulp Organic Chemistry technology industry and agriculture dissolving pulp hemicellulose 021001 nanoscience & nanotechnology Pulp and paper industry strength properties 0104 chemical sciences Biotechnology chemistry Kraft process engineering 0210 nano-technology business Kraft paper |
| Zdroj: | Laine, C, Asikainen, S, Talja, R, Stépán, A, Sixta, H & Harlin, A 2016, ' Simultaneous bench scale production of dissolving grade pulp and valuable hemicelluloses from softwood kraft pulp by ionic liquid extraction ', Carbohydrate Polymers, vol. 136, pp. 402-408 . https://doi.org/10.1016/j.carbpol.2015.09.039 |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2015.09.039 |
| Popis: | Ionic liquid extraction of wood pulp has been highlighted as a highly potential new process for dissolving pulp production. Coproduction with a polymeric hemicellulose fraction was demonstrated in bench scale from softwood kraft pulp using extraction with the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIM OAc) and water. In total, the recovered pulp and hemicellulose fraction together yielded 95.5 wt.% of the pulp input. The extracted pulp had a remarkably high purity with an R18-value of 97.8%. The hemicellulose fraction consisted of galactoglucomannan, arabinoxylan and some cellulose and was precipitated from the ionic liquid-water mixture. After hydroxypropylation of the hemicellulose fraction, films were prepared and barrier and strength properties were compared to films from other polysaccharides. Reduced oxygen and water vapor permeation and good strength properties were demonstrated when compared to corresponding films from hydroxypropylated xylan from cold caustic extraction. The films have potential for applications in food packaging and edible films. |
| Databáze: | OpenAIRE |
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