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New aspects in cationization of lignocellulose materials. V. Modification of rotten aspen wood meal with quarternary ammonium groups
Author(s) -
Šimkovic Ivan,
Ebringerová Anna,
Antal Miroslav,
Micko Michael M.
Publication year - 1987
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.1987.070330609
Subject(s) - cellulose , lignin , ammonium , yield (engineering) , extraction (chemistry) , chemistry , nuclear chemistry , organic chemistry , pulp and paper industry , materials science , composite material , engineering
Holocelluloses prepared from clear and rotten aspen wood were gradually fractionated with 2.5% NH 4 OH, 4.5% NaOH, and 17.5% NaOH, respectively. A higher yield of polysaccharides (24.4%) was obtained from the rotten sample in comparison with clear wood (20.9%). Trimethyl ammonium‐2‐hydroxypropyl (TMAHP) derivatives of rotten aspen were prepared by the reaction of wood with 3‐chlor‐2‐hydroxypropyltrimethylammoniumchloride (CHMAC) in alkaline medium. The quantity of TMAHP—hemicelluloses (yield 14.1%) is only slightly lower in comparison with TMAHP—hemicelluloses (yield 15.8%) obtained by modification and subsequent extraction from clear aspen wood meal. The hemicelluloses isolated from the rotten aspen wood meal are contaminated with low molecular cellulose fraction, the degradation products of cellulose attacked by fungi. The lignin component of rotten wood is less intensively attacked by fungi than the polysaccharidic one.