College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Carbohydr Polym. 2015 Nov 20;133:517-23. doi: 10.1016/j.carbpol.2015.07.059. Epub 2015 Jul 23.
A solvent system consisting of 1,3-dimethyl-2-imidazolidinone (DMI), and ionic liquid 1-butyl-3-methylimidazolium acetate (BMIMOAc) was used to separate polysaccharides from rice husk and wheat bran. The effects of the DMI/BMIMOAc ratios, temperature, and time on the dissolution of rice husk and wheat bran were investigated, and the influence of anti-solvents on the regeneration of polysaccharides-rich material was evaluated. We found that the solvent system is more powerful to dissolve rice husk and wheat bran than pure BMIMOAc, and that polysaccharides-rich material can be effectively separated from the biomass solution. The polysaccharides content of regenerated material from wheat bran can reach as high as 94.4% when ethanol was used as anti-solvents. Under optimized conditions, the extraction rate of polysaccharides for wheat bran can reach as high as 71.8% at merely 50°C. The recycled solvent system exhibited constant ability to separate polysaccharides from rice husk and wheat bran.
采用由 1,3-二甲基-2-咪唑烷酮（DMI）和离子液体 1-丁基-3-甲基咪唑乙酸盐（BMIMOAc）组成的溶剂体系，从稻壳和麦麸中分离多糖。考察了 DMI/BMIMOAc 比、温度和时间对稻壳和麦麸溶解的影响，并评价了抗溶剂对富含多糖物质再生的影响。结果表明，与纯 BMIMOAc 相比，该溶剂体系对稻壳和麦麸的溶解能力更强，并且可以有效地从生物质溶液中分离出富含多糖的物质。当使用乙醇作为抗溶剂时，从麦麸中再生的富含多糖物质的多糖含量可高达 94.4%。在优化条件下，仅在 50°C 下，麦麸中多糖的提取率就可高达 71.8%。该回收溶剂体系对从稻壳和麦麸中分离多糖的能力保持恒定。
