相关实验视频
Updated: Sep 19, 2025

10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
18.3K
关于纤维素在酸盐基离子液体中的溶解和降解模式的研究以及三元相位图的构建
Jing Tian1, Hongshuai Gao2, Yan Long3
1Longzihu New Energy Laboratory, Henan University, Zhengzhou 450000, China; Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450046, China.
International journal of biological macromolecules
|June 18, 2025
概括
绿色溶剂,如酸盐基离子液体 (ILs),是可持续纤维素纤维生产的关键. 这项研究阐明了它们的溶解和再生机制,为工业应用提供了重要的数据.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 聚合物化学 聚合物化学
背景情况:
- 对可持续材料的日益增长的需求推动了对环保纤维素加工溶剂的需求.
- 基于酸盐的离子液体 (ILs) 的工业应用受到纤维素溶解和再生的不清楚机制的阻碍.
研究的目的:
- 研究基于酸盐的ILs在纤维素溶解和再生中的机制.
- 合成和描述用于纤维素加工的五种新的基于酸盐的ILs.
- 提供理论和实验数据,以优化工业纤维素织中的ILs.
主要方法:
- 合成和描述五种基于酸盐的ILs.
- 通过偏光显微镜观察到60°C的纤维素溶解.
- 分子重量分析以确定纤维素降解模式.
- 密度函数理论 (DFT) 对键强度的计算.
- 度定位以获得三元相位图.
- 通过COSMO-RS方法来确定再生过程中的过度.
主要成果:
- 五种基于酸盐的ILs在60°C时成功地溶解了纤维素.
- 纤维素的降解取决于时间和温度,观察到的程度不同.
- [Emim]MP与纤维素之间的最强键计算为124.24kJ/mol.
- 三级相图揭示了离子大小和链条长度对再生的影响.
- 科斯摩-RS验证了研究IL系统的再生能力.
结论:
- 基于酸盐的IL显示出作为绿色溶剂的希望,用于纤维素溶解和再生.
- 了解降解机制和再生条件对于工业可行性至关重要.
- 这项研究为这些IL在可持续纤维素纤维生产中的应用提供了基础.
相关概念视频
Phase Diagrams
44.2K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
44.2K
Phase Diagram
6.1K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
6.1K
Factors Affecting Solubility
34.0K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
34.0K
Cellulose and Pectic Polysaccharides
3.9K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.9K
Membrane Fluidity
12.1K
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
12.1K

