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Cellulose

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01-06-2010

Swelling and dissolution mechanism of lyocell fiber in aqueous alkaline solution containing ferric tartaric acid complex

Authors: Hai Vu-Manh, Hale Bahar Öztürk, Thomas Bechtold

Published in: Cellulose | Issue 3/2010

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Abstract

Swelling properties of lyocell fibers in FeTNa (ferric tartaric acid complex) solutions were studied. Concentrations of Fe and free NaOH in FeTNa were varied, while the ratio between FeCl₃.6H₂O: tartaric acid was kept constant as 1:3.28. The concentration of Fe ion varied from 0.15 to 0.55 M. The free NaOH concentration in FeTNa solutions was chosen as 0.4; 0.8; 1.25; 2.5 and 5 M. Fiber diameter measurements following 2 min of swelling and swelling rate of lyocell fiber up to 60 min were studied. Depending on concentration of Fe and free NaOH in FeTNa solutions and fiber swelling time; swelling, dissolution, disintegration or dramatic swelling were observed. 0.4 and 5 M free NaOH containing FeTNa solutions could only swell the fiber but could not dissolve it. 2.5 M free NaOH containing FeTNa solutions dissolved the fiber in a few minutes. FeTNa solutions containing free NaOH concentration from 0.8 to 1.25 M resulted in either dissolution or limited swelling depending on Fe concentration.

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Title: Swelling and dissolution mechanism of lyocell fiber in aqueous alkaline solution containing ferric tartaric acid complex
Authors: Hai Vu-Manh
Hale Bahar Öztürk
Thomas Bechtold
Publication date: 01-06-2010
Publisher: Springer Netherlands
Published in: Cellulose / Issue 3/2010
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-010-9404-z

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