A possible means of realizing a sacrifice-free three component separation of lignocellulose from wood biomass using an amino acid ionic liquid
作者:Yukoh Hamada、Kohei Yoshida、Ryo-ichi Asai、Shuichi Hayase、Toshiki Nokami、Shunsuke Izumi、Toshiyuki Itoh
DOI:10.1039/c3gc40445e
日期:——
Lignocellulose materials are potentially valuable resources for transformation into many bio-products. However, because of the difficulty in fractionating them into cellulose, hemicellulose, and lignin by a simple method directly from wood biomass, their economical conversion into high value-added products has been greatly limited. We found that N-methyl-N-(2-methoxyethyl)pyrolidin-1-ium 2,6-diaminohexanoate ([P1ME][Lys]) dissolved lignin very well below 60 °C, but that 80 °C was required for it to dissolve cellulose. Taking advantage of this difference in dissolution ability, direct extraction of lignin from wood biomass has been accomplished under mild conditions without the use of any hazardous reagents. Since lignin acts as the essential glue that binds cellulose and hemicellulose and gives plants their structural integrity, we have achieved the demonstration of the sacrifice-free separation of cellulose, hemicellulose, and lignin from wood biomass (Japanese cedar: Cryptomeria japonica).
木质纤维素材料有潜力成为转化成多种生物产品的宝贵资源。然而,由于难以通过简单方法将木材生物质直接分馏成纤维素、半纤维素和木质素,它们向高附加值产品的经济转化受到了很大限制。我们发现,N-甲基-N-(2-甲氧基乙基)吡咯烷-1-鎓-2,6-二氨基己酸([P1ME][Lys])在60 °C以下非常溶解木质素,但要溶解纤维素则需要80 °C。利用这种溶解能力的差异,我们可以在温和条件下直接从木质生物质中提取木质素,而不使用任何有害试剂。木质素作为粘合纤维素和半纤维素并赋予植物结构完整性的基本物质,我们实现了从木材生物质(日本柳杉:Cryptomeria japonica)中无损伤分离出纤维素、半纤维素和木质素。