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Resistance of Valonia cellulose to mercerization
Author(s) -
Okajima Saburo,
Kai Akira
Publication year - 1967
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.1967.070110209
Subject(s) - cellulose , crystallite , ramie , chemistry , pulp (tooth) , polymer chemistry , chemical engineering , materials science , crystallography , organic chemistry , dentistry , medicine , engineering , fiber
The mercerization behavior at 20°C. of Valonia macrophysa cellulose of Japanese origin was investigated by x‐ray, moisture regain, and infrared spectrographic methods. The NaOH concentration range necessary for mercerization was 16–20%, which is higher than those required for wood pulp (8–11%), ramie or cotton (11–14%), and even the animal cellulose, Tunicin (14–16%). Treatment with the alkaline solution of the ordinary concentration (17.5%) for 4 days could not mercerize it, and even mercerization with a 19% solution brought about the presence of the reflection from (101) II along with those from (10 1 ) I and (101) I after regeneration. Such a high resistance to mercerization of the Valonia cellulose may be due to its larger crystallite size rather than the crystalline content.