Fiber and Polymer Technology, Royal Institute of Technology (KTH), Teknikringen 56, SE-100 44 Stockholm, Sweden.
Fiber and Polymer Technology, Royal Institute of Technology (KTH), Teknikringen 56, SE-100 44 Stockholm, Sweden.
Carbohydr Polym. 2015 Nov 20;133:179-86. doi: 10.1016/j.carbpol.2015.07.023. Epub 2015 Jul 13.
Polymeric hemicelluloses were extracted by autohydrolysis and alkali from a biomass feed consisting of the stems of rapeseed straw according to a full statistical factorial screening design. Water extraction yielded fractions rich in galactoglucomannan, while alkaline extraction yielded primarily xylan. The extracted galactoglucomannan and xylans had similar molecular weights, while the yield of xylan was higher than the yield of galactoglucomannan. The extracted hemicellulose fractions also contained some lignin (7-15%) and traces of Ca, K, Na, and Si. Free-standing films were prepared from the hemicellulose fractions with different xylan:galactoglucomannan ratios. The rapeseed xylan films showed strain-to-break values >60% without any added plasticizers.
采用全因子统计筛选设计，从由油菜秸秆茎组成的生物质饲料中通过自水解和碱提取得到聚合半纤维素。水提取得到富含半乳甘露聚糖的级分，而碱性提取主要得到木聚糖。提取的半乳甘露聚糖和木聚糖具有相似的分子量，而木聚糖的产率高于半乳甘露聚糖的产率。提取的半纤维素级分还含有一些木质素（7-15%）和痕量的 Ca、K、Na 和 Si。不同木聚糖：半乳甘露聚糖比例的半纤维素级分制备了自立式薄膜。油菜木聚糖薄膜在没有添加任何增塑剂的情况下，断裂伸长率>60%。
