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New aspects in cationization of lignocellulose materials. III. Influence of delignification on reactivity and extractability of TMAHP–hemicelluloses
Author(s) -
Ebringerová Anna,
Antal Miroslav,
Šimkovic Ivan,
Micko Michael M.
Publication year - 1986
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.1986.070310201
Subject(s) - lignin , reactivity (psychology) , sawdust , hemicellulose , chemistry , organic chemistry , yield (engineering) , xylan , cellulose , materials science , medicine , alternative medicine , pathology , metallurgy
Abstract Beech sawdust samples with different lignin content were alkylated with 3‐chloro‐2‐hydroxypropyltrimethylammoniumchloride (CHMAC). The yields and the degree of subtitution of trimethylammonium‐2‐hydroxypropyl (TMAHP) samples were similar. Differences were found in extractability of hemicelluloses from this materials both with water and dilute alkali. To obtain the maximum yield of TMAHP–hemicelluloses (ca. 90% of the amount originally present), it is sufficient to remove about 50% of lignin. The lignin component does not influence the reactivity of hemicelluloses. The isolated hemicelluloses differ only in the distribution of functional groups and extractability.