重新检查酸/酸欧特基混合物的增强溶解性
Jing Hu1, Svetoslav E Anachkov2, Teanoosh Moaddel1
1Unilever R&D, 40 Merrit Boulevard, Trumbull, Connecticut 06611, United States.
Langmuir : the ACS journal of surfaces and colloids
|January 10, 2025
概括
劳拉酸和酸混合物表现出由于固态中间化合物而导致的广泛的克拉夫特点缩,而不是真正的性行为. 这影响了其在低温表面活性剂应用中的性能.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 合体和表面化学
背景情况:
- 表面活性剂的混合物比单个成分提供了更好的性能.
- 降低克拉夫特点 (TK) 对于低温表面活性剂应用是可取的.
- 酸 (NaL) 和酸 (NaOl) 混合物是研究表面活性剂混合物的模型系统.
研究的目的:
- 为了调查广泛的克拉夫特点 (TK) 在酸/酸混合物中的抑郁的原因.
- 阐明NaL/NaOl混合物的固态行为和相相互作用.
- 为了理解这种表面活性剂系统中偏离理想的性行为.
主要方法:
- 连线分析以确定固态相共存.
- 孤立固体相的X射线衍射分析.
- 热分析和结点低谷模型.
主要成果:
- NaL/NaOl混合物不构成真正的化物;纯成分不会在固态阶段共存.
- 一种独特的中间化合物 (IC). 具有NaL:NaOl分子比例约为4/3的,在固态中形成.
- 固体相由NaL/I.C.组成. 或IC/NaOl混合物,表现出优菌或单菌的行为,导致广泛的TK最小值.
结论:
- 在NaL/NaOl混合物中,广泛的克拉夫特点压缩归因于固态中间化合物的形成.
- I.C. 的一致点. 密切接近欧特克斯点,导致一个广泛的TK最小值.
- 需要进一步的研究来了解为什么具有不同头组但相似链长的表面活性剂不会显示类似的TK抑郁.
相关概念视频
Solubility
17.3K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
17.3K
Ionic Strength: Effects on Chemical Equilibria
1.3K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
In this solution, the primary...
1.3K
Solubility Equilibria: Overview
589
When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
Solubility is important in biological and environmental processes. A notable...
589
Solvating Effects
7.3K
An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
7.3K
Colloids
17.3K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.3K
Solution Formation
31.3K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
This selective...
31.3K


