超长链非离子表面活性剂的可溶性量化和零度以下温度相位行为
Lulu Liu1, Runxi Wang2, Jiuxia Wang3
1Polymer Research Institute, State Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu 610065, China.
Journal of colloid and interface science
|November 28, 2025
概括
这项研究探讨了超长链非离子表面活性剂.
科学领域:
- 表面活性剂化学 表面活性剂化学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 超长链 (≥C18) 聚氧乙烯非离子表面活性剂的低于零溶解度尚不清楚.
- 传统的云点 (CP) 模型在极端条件下无法完全捕捉溶解度.
- 了解分子架构对溶解度的影响对于专业应用至关重要.
研究的目的:
- 为了研究超长链聚氧乙烯非离子表面活性剂的零下可溶性行为.
- 为了建立表面活性剂结构和溶解度指标之间的定量关系.
- 探索分子架构如何影响超越CP范式的溶解度.
主要方法:
- 三系列超长链聚氧乙烯非离子表面活性剂的合成,具有不同的头组分子量,尾部长度和不和度.
- 使用1H NMR和质谱学进行结构性表征.
- 在乙烯甘醇/水混合物中使用紫外线光谱,DSC,冷TEM,POM和SAXS评估溶解度和低温相位行为.
主要成果:
- 建立了基于表面活性剂结构的阶段过渡温度1 (PTT1) 和云点 (CP) 的三个定量关系.
- 确定了特定的表面活性物结构,在CP以下或在零度以下的温度下显示PTT1.
- 确定较高的头组分子量和较长的尾部长度降低了冷溶解度,而增加的不和增加了它.
结论:
- 证明表面活性剂结构显著影响零下溶解度和相位行为.
- 为设计用于零度以下应用的超长链表面活性剂提供了一个框架.
- 推进了对在极端条件下表面活性剂行为的基本理解.
相关概念视频
03:00Solubility
20.8K
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,...
20.8K
02:05Entropy and Solvation
8.2K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
8.2K
02:56Intermolecular Forces and Physical Properties
26.3K
26.3K
02:39Enthalpy of Solution
29.8K
There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:
29.8K
02:34Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
50.1K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
50.1K
02:55Solubility of Ionic Compounds
67.9K
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.
67.9K