一种带有基乙基组的多聚乙烯四度盐表面活性剂的表面活性,湿化和聚合
Jiangxun Dou1, Jiaoyan Liu1, Yan Wang1
1School of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Molecules (Basel, Switzerland)
|October 28, 2023
概括
这项研究引入了一种新型碳表面活性剂,PFPE-C,在水溶液中显示出卓越的表面活性和高效的表面张力降低. 此外,PFPE-C具有良好的湿透性,形成囊泡,并观察到部分生物降解.
科学领域:
- 表面化学 表面化学
- 材料科学 材料科学 材料科学
- 体和接口科学科学
背景情况:
- 四级表面活性剂在各种工业应用中至关重要.
- 与碳化合物对应物相比,碳化合物表面活性剂具有独特的特性.
- 了解新型表面活性剂的表面行为对于开发先进材料至关重要.
研究的目的:
- 合成和描述一种具有基乙基组的新型四级表面活性剂,称为PFPE-C.
- 研究PFPE-C在水溶液中的表面特性,包括表面张力,关键微粒度和微粒化行为.
- 将PFPE-C的表面活性与结构相似的碳化合物表面活性剂进行比较.
主要方法:
- 合成PFPE-C和对DHDAC和PFPE-A进行比较分析.
- 测量表面张力以确定最小表面张力 (γCMC) 和临界菌度 (CMC).
- 使用诸如Cryo-TEM这样的技术,研究化,聚合,空气-水界面吸附和可湿性.
- 主要生物降解的评估.
主要成果:
- PFPE-C的最小表面张力 (γCMC) 为17.35mN/m,临界菌度 (CMC) 为0.024mmol/L.
- 与类似的碳化合物表面活性剂相比,碳化合物表面活性剂,如PFPE-C,表现出较高的表面活性.
- PFPE-C水溶液在PTFE和抛膜上显示出良好的湿透性,并在水溶液中形成囊泡.
- 最初的生物降解试验表明,PFPE-C在一周内降解了19%.
结论:
- 含有基乙基的表面活性剂有效降低了表面张力.
- PFPE-C是一种高效的表面活性剂,在需要表面修饰和可湿度的应用中具有显著的潜力.
- PFPE-C的结构特征有助于其增强的表面活性和独特的聚合行为.
相关概念视频
03:00Solubility
17.5K
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,...
17.5K
01:09Colloidal precipitates
596
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
596
03:22Colloids
17.5K
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...
17.5K
02:57Surface Tension, Capillary Action, and Viscosity
27.9K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.9K
01:25Esters to Carboxylic Acids: Saponification
4.4K
Esters can be hydrolyzed to carboxylic acids under acidic or basic conditions. Base-promoted hydrolysis of esters is a nucleophilic acyl substitution reaction in which esters react with an aqueous base, followed by an acid to give carboxylic acids. This reaction is also known as saponification because it forms the basis for making soaps from fats.
The reaction requires a base in stoichiometric amounts, which participates in the reaction and is not regenerated later. So, the base acts as a...
The reaction requires a base in stoichiometric amounts, which participates in the reaction and is not regenerated later. So, the base acts as a...
4.4K
01:22Surface Tension of Fluid
309
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
Surface tension varies...
309