Biomass-Derived γ-Valerolactone-Based Solvent Systems for Highly Efficient Dissolution of Various Lignins: Dissolution Behavior and Mechanism Study

详细信息    查看全文

• 作者：Zhimin Xue ; Xinhui Zhao ; Run-cang Sun ; Tiancheng Mu
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：4
• 期：7
• 页码：3864-3870
• 全文大小：495K
• 年卷期：0
• ISSN：2168-0485

文摘

Binary solvent systems consisting of biomass-derived γ-valerolactone (GVL) and one cosolvent (e.g., water, ionic liquids, DMSO, and DMF) were developed as highly efficient systems for dissolution of various types of lignin. It was found that the content of cosolvent in GVL significantly affected the solubility of lignins. More importantly, we first concluded that the relationship between the solubility of lignin and hydrogen bond basicity parameter β value of solvents depends both on the solvent and on the lignin, which clarifies the existing dispute on this topic. Additionally, the dissolved lignin can be easily recovered by the addition of ethanol without its structure noticeably changing. The as-proposed systems are not only mild and highly efficient but also versatile and flexible (with different components and concentrations), thus adapting to the highly diversity of lignin.