用碳酸盐基IL (CBILS) 工艺制备的20种离子液体的物理化学特性
Lukas Pachernegg1,2, Janine Maier1,2, Reyhan Yagmur1,2
1Institute of Bioproducts and Paper Technology, Graz University of Technology, Graz 8010, Austria.
Journal of chemical and engineering data
|May 15, 2024
概括
这项研究为20种离子液体 (IL) 提供了关键的物理化学数据,这些液体对于储能等应用至关重要. 一个新的预测模型将晶体体积,表面张力和粘度相关联,有助于IL设计.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 离子液体 (ILs) 是多功能材料,在储能,催化和生物质加工方面具有重要应用.
- 它们的实用性取决于物理化学性质,如粘度,密度和表面张力,这些都取决于阴离子-离子化学.
- 对许多商业IL缺乏全面的物理化学数据,这阻碍了它们的有效应用和设计.
研究的目的:
- 通过测量20个商业IL的关键物理化学参数来扩大对离子液体性质的知识基础.
- 开发一种基于晶体体体积和分散表面张力的剪切粘度估计的预测模型.
- 调查阴离子/离子基侧链长度和离子头组对IL特性的影响.
主要方法:
- 对20种商业离子液体进行密度,折射率,表面张力 (包括极性和分散成分) 和剪切粘度的实验测量.
- 开发和验证晶体体体积,分散表面张力和剪切粘度之间的预测相关性.
- 对不同基侧链长度和离子头组结构对测量性能的影响进行系统分析.
主要成果:
- 确定了20种商业离子液体的物理化学数据 (密度,折射率,表面张力,剪切粘度).
- 建立了一个新的相关性,使度估计从晶体体积和分散的表面张力.
- 增加离子头组大小显著降低了表面张力 (高达35.7%) 和剪切粘度.
- 发现分散的表面张力与离子液体的折射率线性相关.
结论:
- 生成的物理化学数据和预测模型增强了对离子液体行为的理解.
- 这些发现有助于更准确的结构属性预测,加速了定制离子液体的设计和应用.
- 这项工作有助于有效开发用于各种工业应用的离子液体.
相关概念视频
02:54Molecular and Ionic Solids
17.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
17.1K
01:19Physical Properties of Carboxylic Acid Derivatives
2.6K
Intermolecular forces dictate several physical properties such as boiling points, melting points, solubilities, and so forth. They are classified into four types: ionic forces, hydrogen bonds, dipole–dipole forces, and dispersion forces. Ionic forces are the strongest, while dispersion forces are the weakest.
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
2.6K
01:31Physical Properties of Carboxylic Acids
4.9K
Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
4.9K
02:48Ionic Bonding and Electron Transfer
41.4K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
41.4K
02:19Physical Properties Affecting Solubility
22.6K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
22.6K
02:55Solubility of Ionic Compounds
63.0K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
63.0K