NMR Study on the Roles of Li+ in the Cellulose Dissolution Process

作者：Huang, Hailong; Ge, Hao; Song, Jianhui; Yao, Yefeng; Chen, Qun; Xu, Min^*

来源：ACS Sustainable Chemistry and Engineering, 2019, 7(1): 618-624.

DOI：10.1021/acssuschemeng.8b04177

• Cellulose
• LiOH/urea solvent
• Solid-state NMR
• 2D LGHETCOR
• Roles of Li+

LiOH/urea aqueous solvent is a very efficient system to dissolve cellulose. However, there is still no mature theory to explain the roles of the Li ions in improving the dissolution ability of cellulose in the LiOH/urea solution. In this work, the existing forms of Li+ and the interactions of the components in LiOH/urea/cellulose system were investigated by solid-state NMR techniques. It was observed that as many as four types of Li+ existed in the LiOH/urea/cellulose system. Some direct evidence from the H-X(C-13,Li-6) 2D NMR experiments were provided to clarify the roles of Li+ ions in the dissolution of cellulose in the LiOH/urea system, and a 3D interaction model was proposed. The interactions among the components in the system were discussed at the molecular level.

• 出版日期2019-1-7
• 单位华东师范大学