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Cellulose

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12.09.2018 | Original Paper

Cellulose acetate fibers with improved mechanical strength prepared with aqueous NMMO as solvent

verfasst von: Wei Yuan, Kaijian Wu, Na Liu, Yumei Zhang, Huaping Wang

Erschienen in: Cellulose | Ausgabe 11/2018

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Abstract

Cellulose diacetate (CA) was successfully dissolved in N-methylmorpholine N-oxide aqueous solution (NMMO·H₂O). The CA degraded little during the dissolving process and the homogenous CA/NMMO·H₂O solutions were obtained even when the concentration was up to 18%. From the rheological behavior of the CA/NMMO·H₂O solution, it was found that the viscosity of the solution was lower than that of lyocell solution, which is due to the lower degree of polymerization and the substitute of acetyl group. Then CA fibers were prepared by dry-jet wet spinning process. The tenacity and the E-modulus of the regenerated CA fibers were up to 3.0 cN/dtex and 75 cN/dtex respectively, and the former was larger than that of industrial CA fibers prepared by dry spinning process. This is related to the structure of the CA fibers, because the crystallinity, crystal orientation of the fibers can be improved by high draw ratio during dry-jet wet spinning process. Otherwise, the CA fibers showed no fibrillation tendency, which showed improved wearing comfort compared to lyocell fibers. This work provided an effective way to produce new CA fibers with higher tensile strength.

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Vorheriger Artikel Optimization of dilute acid pretreatment of barley husk and oat husk and determination of their chemical composition

Nächster Artikel First triple-functional polyoxometalate Cs10.6[H2.4GeNb13O41] for highly selective production of methyl levulinate directly from cellulose

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Titel: Cellulose acetate fibers with improved mechanical strength prepared with aqueous NMMO as solvent
verfasst von: Wei Yuan
Kaijian Wu
Na Liu
Yumei Zhang
Huaping Wang
Publikationsdatum: 12.09.2018
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 11/2018
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-018-2032-8

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Abstract

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