用离子液体从杨木中提取的木质素大分子的结构特征。
Structural features of lignin macromolecules extracted with ionic liquid from poplar wood.
机构信息
Department of Forest Sciences and Research Institute for Agriculture and Life Science, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-921, Republic of Korea.
出版信息
Bioresour Technol. 2011 Oct;102(19):9020-5. doi: 10.1016/j.biortech.2011.07.081. Epub 2011 Jul 28.
1-Ethyl-3-methylimidazolium acetate ([Emim][CH₃COO]) was used for the extraction of lignin from poplar wood (Populus albaglandulosa), which was called to ionic liquid lignin (ILL) and structural features of ILL were compared with the corresponding milled wood lignin (MWL). Yields of ILL and MWL were 5.8±0.3% and 4.4±0.4%, respectively. The maximum decomposition rate (V(M)) and temperature (T(M)) corresponding to V(M) were 0.25%/ °C and 308.2 °C for ILL and 0.30%/ °C and 381.3 °C for MWL. The amounts of functional groups (OMe and phenolic OH) appeared to be similar for both lignins; approximately 15.5% and 6.7% for ILL and 14.4% and 6.3% for MWL. However, the weight average molecular weight (M(w)) of ILL (6347 Da) was determined to be 2/3-fold of that of MWL (10,002 Da) and polydispersity index (PDI: M(w)/M(n)) suggested that the lignin fragments were more uniform in the ILL (PDI 1.62) than in the MWL (PDI 2.64).
1-乙基-3-甲基咪唑醋酸盐 ([Emim][CH₃COO]) 用于从杨木（Populus albaglandulosa）中提取木质素，这种木质素被称为离子液体木质素 (ILL)，并比较了 ILL 的结构特征与相应的磨木木素 (MWL)。ILL 和 MWL 的产率分别为 5.8±0.3% 和 4.4±0.4%。ILL 和 MWL 的最大分解速率 (V(M)) 和温度 (T(M)) 对应的 V(M) 分别为 0.25%/°C 和 308.2°C，0.30%/°C 和 381.3°C。两种木质素的功能基团（甲氧基和酚羟基）含量似乎相似；ILL 约为 15.5%和 6.7%，MWL 约为 14.4%和 6.3%。然而，ILL 的重均分子量 (M(w))（6347 Da）被确定为 MWL（10002 Da）的 2/3 倍，多分散指数（PDI：M(w)/M(n)）表明 ILL 中的木质素片段更均匀（PDI 为 1.62），而 MWL 中的木质素片段则不均匀（PDI 为 2.64）。
Zotero 插件