Reversible swelling of the cell wall of poplar biomass by ionic liquid at room temperature.
Reversible swelling of the cell wall of poplar biomass by ionic liquid at room temperature.
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DOI：
10.1016/j.biortech.2010.12.087
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发表时间：
2011-03
影响因子：
11.4
通讯作者：
Rector KD
中科院分区：
文献类型：
--
作者：
Lucas M;Wagner GL;Nishiyama Y;Hanson L;Samayam IP;Schall CA;Langan P;Rector KD
采用时间分辨自体荧光光谱、拉曼光谱和X射线扫描探针相结合的方法，研究了杨树木质纤维生物量及其在离子液体1-N-乙基-3-甲基咪唑(EMIMAC)处理过程中的变化。EMIMAC从管腔穿过细胞壁，使细胞壁向空腔膨胀约2倍。然而，中间的薄层保持不变，防止细胞壁向外膨胀。在这一膨胀过程中，大多数纤维素微纤维被溶解，但链迁移受到限制，少量微纤维持续存在。当EMIMAC被排出时，纤维素重结晶为纤维素I的微纤维。处理后细胞壁的相对化学成分几乎没有变化。因此，在室温下，EMIMAC对杨树细胞壁的作用表现为细胞壁的可逆膨胀和可逆去结晶。
Time-resolved autofluorescence, Raman microspectroscopy, and scanning microprobe X-ray diffraction were combined in order to characterize lignocellulosic biomass from poplar trees and how it changes during treatment with the ionic liquid 1-n-ethyl-3-methylimidazolium acetate (EMIMAC) at room temperature. The EMIMAC penetrates the cell wall from the lumen, swelling the cell wall by about a factor of two towards the empty lumen. However, the middle lamella remains unchanged, preventing the cell wall from swelling outwards. During this swelling, most of the cellulose microfibrils are solubi-lized but chain migration is restricted and a small percentage of microfibrils persist. When the EMIMAC is expelled, the cellulose recrystallizes as microfibrils of cellulose I. There is little change in the relative chemical composition of the cell wall after treatment. The action of EMIMAC on the poplar cell wall at room temperature would therefore appear to be a reversible swelling and a reversible decrystallization of the cell wall.
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影响因子：
15
作者：
Nishiyama, Y;Sugiyama, J;Langan, P
通讯作者：
Langan, P
影响因子：
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作者：
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