Wallenberg Wood Science Center, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Wallenberg Wood Science Center, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden; Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Carbohydr Polym. 2015 Mar 6;117:19-24. doi: 10.1016/j.carbpol.2014.09.050. Epub 2014 Sep 28.
A novel mechanical pre-treatment method was used to separate the wood chips into fiber bundles in order to extract high molecular weight wood polymers. The mechanical pre-treatment involved chip compression in a conical plug-screw followed by defibration in a fiberizer. The fiberized wood was treated with hot water at various combinations of time and temperature in order to analyze the extraction yield of hemicelluloses at different conditions. Nearly 6 mg/g wood of galactoglucomannan was obtained at 90 °C/120 min which was about three times more than what could be extracted from wood chips. The extracted carbohydrates had molecular weight ranging up to 60 kDa. About 10% of each of the extracted material had a molecular weight above 30 kDa. The extraction liquor could also be reused for consecutive extractions with successive increase in the extraction yield of hemicelluloses.
采用一种新颖的机械预处理方法将木屑分离成纤维束，以提取高分子量木材聚合物。机械预处理包括在锥形塞螺杆中压缩木屑，然后在纤维化机中纤维化。将纤维化的木材用热水在不同的时间和温度组合下处理，以分析不同条件下半纤维素的提取率。在 90°C/120 分钟的条件下，可从木材中提取约 6 毫克/克的半乳糖甘露聚糖，这是从木屑中提取的三倍以上。提取的碳水化合物的分子量高达 60 kDa。大约有 10%的提取物质的分子量超过 30 kDa。提取液也可以重复使用，连续提取，半纤维素的提取率逐渐增加。
