基于克洛索-多德卡酸盐的具有扭曲经典形态的二基表面活性剂:在水中合成和非典型的化
Belhssen Hleli1, Žiga Medoš2, Peter Ogrin2
1Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 40 Prague 2, Czech Republic.
Journal of colloid and interface science
|June 16, 2023
概括
新型离子表面活性剂具有重的离子头,挑战了传统的微粒形成概念. 这些化合物形成多样化的微粒,其聚合数量下降,并具有显著的对结合,使阶段性微粒化模型无效.
科学领域:
- 超分子化学 超分子化学
- 体科学 体科学 体科学
- 材料科学 材料科学 材料科学
背景情况:
- 离子表面活性剂化的经典理解涉及单一的临界细胞度 (CMC),导致阶段式聚合.
- 具有独特头部组和尾部相互作用的新型两结构可能表现出不同的自我组装行为.
研究的目的:
- 合成和表征新型的两性化合物,这些化合物具有重的二性头部和性尾部.
- 研究这些表面活性剂在水溶液中的自我组装行为,并挑战经典的化概念.
主要方法:
- 新型表面活性剂的二盐的合成,其中包括密闭二甲二和基尾.
- 使用张力测量,光和小角度X射线散射,电子显微镜,NMR光谱,异热定位热量测量 (ITC) 和分子动力学 (MD) 模拟,对自组装的表征.
- 微粒化过程的热力学建模.
主要成果:
- 表面活性剂自组装成相对较小的粒,其中聚合数随着表面活性剂度的增加而减少.
- 观察到广泛的对子离子结合 (离子),显示了与聚合数的复杂补偿.
- 在广泛的度和温度范围内,具有不同大小和反结合的多种微粒共存.
结论:
- 这些新型表面活性剂的自我组装不遵循具有单一CMC的经典阶段式化模型.
- 观察到的行为,以减少聚合数和显著的 counterion 结合为特征,需要对此类系统的小胞形成进行修订理解.
更多相关视频
07:01Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
Published on: January 25, 2018
10.0K
06:31Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
Published on: March 18, 2020
6.4K
相关概念视频
Colloids
17.6K
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...
17.6K
Solubility
17.6K
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,...
17.6K
Detergent Purification of Membrane Proteins
5.2K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
5.2K
