کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4514680 | 1322217 | 2011 | 5 صفحه PDF | دانلود رایگان |

Isolation of cellulose from straw is a bottleneck for exploiting such biomass resources. In recent years, considerable concerns have arisen over new efficient and environmentally friendly way for this purpose. A novel method for cellulose isolation has been proposed by dissolving steam exploded rice straw in 1-allyl-3-methylimidazolium chloride ionic liquid (IL), following regeneration of crude cellulose by diluting the cellulose-ionic liquid solution adequately after separation of insoluble residues. The crude cellulose was then bleached by 2% hydrogen peroxide aqueous solution with low-flux ozone blowing into. No acid-insoluble lignin and only 0.85% hemicelluloses were detected in the bleached cellulose. The isolated cellulose was analyzed by SEM, FT-IR, 13C CP/MAS solid state NMR, XRD spectroscopes, and the results indicated that high quality cellulose preparation could be isolated in this manner from rice straw.
► Rice straw was pretreated with steam-explosion under optimized conditions to remove most significant hemicelluloses.
► Dissolving steam-explosion pretreated rice straw in 1-allyl-3-methylimidazolium chloride ionic liquid (IL) and filtering to remove the insoluble residues, then regenerating crude cellulose by diluting the cellulose-ionic liquid solution adequately.
► The crude cellulose was bleached with 2% hydrogen peroxide aqueous solution with low-flux ozone blowing into.
► The bleached cellulose preparation was detected to contain no acid-insoluble lignin and only 0.85% hemicelluloses.
Journal: Industrial Crops and Products - Volume 33, Issue 3, May 2011, Pages 734–738