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Preparation and properties of chemical cellulose from ascidian tunic and their regenerated cellulose fibers
Author(s) -
Koo YoungSeok,
Wang YoungSoo,
You SangHoon,
Kim HanDo
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10711
Subject(s) - cellulose , aqueous solution , regenerated cellulose , degree of polymerization , pulp (tooth) , dissolution , cellulose fiber , fiber , materials science , polymerization , chemistry , polymer chemistry , wet strength , chemical engineering , dissolving pulp , solvent , chemical modification , nuclear chemistry , polymer , organic chemistry , medicine , pathology , engineering
Chemical cellulose (dissolving pulp) was prepared from ascidian tunic by modified paper‐pulp process (prehydrolysis with acidic aqueous solution of H 2 SO 4 , digestion with alkali aqueous solution of NaOH/Na 2 S, bleaching with aqueous NaOCl solution, and washing with acetone/water). The α‐ cellulose content and the degree of polymerization (DPw) of the chemical cellulose was about 98 wt % and 918, respectively. The Japanese Industrial Standard (JIS) whiteness of the chemical cellulose was about 98%. From the X‐ray diffraction patterns and 13 C‐NMR spectrum, it was found that the chemical cellulose obtained here has cellulose Iβ crystal structure. A new regenerated cellulose fiber was prepared from the chemical cellulose by dry–wet spinning using N ‐methylmorpholine‐ N ‐oxide (NMMO)/water (87/13 wt %) as solvent. The new regenerated cellulose fiber prepared in this study has a higher ratio of wet‐to‐dry strength (<0.97) than commercially regenerated cellulose fibers. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1634–1643, 2002.