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Single fiber swelling behavior for natural and man-made cellulose fibers under alkaline treatment
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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12
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Cellulose, Volume 28, issue 18, pp. 11287-11298
Abstract
Swelling behavior of cotton, dissolving wood pulp (DWP), viscose staple fiber, and Tencel staple fiber in varying sodium hydroxide (NaOH) concentration were investigated by means of optical microscopy and were characterized by molecular mass distribution, X-ray diffractometer, and dynamic vapor sorption. The effect of temperature (20–45 °C) and duration (0–120 min) was studied. The results reveal that the swelling ratio of fiber in alkali solution depends on fiber accessibility and NaOH concentration. Viscose staple fiber exhibited the highest swelling ratio and lowest swelling ratio observed for dissolving wood pulp fiber among all the materials. The cotton or DWP fibers provide maximum swelling during alkaline steeping (18wt % lye) at higher temperatures, i.e., 45 °C. As for viscose staple fiber and Tencel staple fiber, using 12 wt% lye concentration and steeping at lower temperatures, i.e., 20 °C maximum swelling behavior.
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The financial support from Jenny and Antti Wihuri Foundation (Grant No. 131219) is gratefully acknowledged. The authors wish to thank Maija Nenonen and Sari Larmu for simulating the industrial viscose process. We thank Dr. Daisuke Sawada (Aalto University) for the crystallinity calculation. Additionally, the authors acknowledge the provision of the facility and technical support by Aalto University at OtaNano-Nanomicroscopy Center (Aalto NMC).
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You, X, Chen, F, Ma, Y, Roselli, A, Enqvist, E & Hassi, H 2021, 'Single fiber swelling behavior for natural and man-made cellulose fibers under alkaline treatment', Cellulose, vol. 28, no. 18, pp. 11287-11298. https://doi.org/10.1007/s10570-021-04280-0