New aspects in cationization of lignocellulose materials. V. Modification of rotten aspen wood meal with quarternary ammonium groups

✍ Scribed by Ivan Šimkovic; Anna Ebringerová; Miroslav Antal; Michael M. Micko

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 351 KB
• Volume: 33
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070330609

✦ Synopsis

Holocelluloea prepared from clear and rotten aspen wood were gradually fractionated with 2.6% NH,OH, 4.5% NaOH, and 17.5% NaOH, respedively. A higher yield of polysaccharides (24.4%) was obtained from the rotten sample in comparison with clear wood (20.9%). k e t h y lammonium-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 kith 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.