Influence of Liquid or Solid Phase Preparation of Cationic Hemicelluloses on Physical Properties of Paper
Influence of Liquid or Solid Phase Preparation of Cationic Hemicelluloses on Physical Properties of Paper
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DOI：
10.15376/biores.8.2.2118-2134
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发表时间：
2013-03
期刊：
影响因子：
1.5
通讯作者：
Virginie Bigand;C. Pinel;D. S. Perez;F. Rataboul;M. Petit-Conil;P. Huber
中科院分区：
文献类型：
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作者：
Virginie Bigand;C. Pinel;D. S. Perez;F. Rataboul;M. Petit-Conil;P. Huber
半乳甘露聚糖型和木聚糖型半纤维素的阳离子化在固态下进行，与2，3-环氧丙基三甲基氯化铵（ETA）作为阳离子试剂在碱性条件下。通过这种方法，对于所有半纤维素类型，反应效率显著增加，在木聚糖的情况下高达90%。与液相反应相比，试剂的消耗减少了十倍，同时获得了可比的取代度（DS）值。通过减少纯化步骤的数量，限制了溶剂的消耗，并保持了高的质量产率。从各方面来看，该方法构成了半纤维素阳离子化反应的经济和环境收益。测试天然半纤维素及其阳离子衍生物作为纸浆浆料的添加剂以增加形成的纸的干强度。半纤维素的阳离子化对纸张的机械性能有有益的影响，与未改性的多糖相比，具有补充的性能增益。DS 0.3的阳离子衍生物对于两种多糖给出了最好的结果，其中半乳甘露聚糖型比木聚糖型更有效，爆裂指数增加90%。
Cationizations of galactomannan- and xylan-type hemicelluloses were performed in a solid state, with 2,3-epoxypropyltrimethylammonium chloride (ETA) as the cationic reagent under alkaline conditions. By this method, the reaction efficiency was significantly increased for all hemicellulose types, up to 90% in the case of xylan. The consumption of reagents was reduced by a factor of ten when compared to the reaction in liquid phase, while comparable values of the degree of substitution (DS) were obtained. By reducing the number of purification steps, the consumption of solvents was limited, and high mass yields were preserved. By all aspects, this method constitutes an economical and environmental gain for the cationization reaction of hemicelluloses. Native hemicelluloses and their cationic derivatives were tested as additives to the pulp slurry in order to increase the dry strength of the paper formed. The cationization of hemicelluloses had a beneficial effect on the mechanical properties of paper, with a supplementary gain of properties compared to the unmodified polysaccharides. Cationic derivatives of a DS 0.3 gave the best results for both polysaccharides, with the galactomannan-type being more efficient than the xylan-type with a 90% increase of the burst index.