表面活性剂溶液的界面扩张性风湿学,具有较低的界面张力
Guoxuan Ma1, Qingtao Gong2, Zhicheng Xu2
1College of Petroleum Engineering, Liaoning Petrochemical University, Fushun 113001, China.
Molecules (Basel, Switzerland)
|February 13, 2025
概括
旋转滴法有效地测量低界面张力系统的油水界面扩展模量. 某些表面活性剂,如基硫贝,产生高的模块,这对于增强的石油回收应用至关重要.
科学领域:
- 合体和表面科学科学
- 表面活性剂化学 表面活性剂化学
- 增强石油回收的方法
背景情况:
- 低界面张力 (IFT) 对于增强石油回收等应用至关重要.
- 测量界面扩张模块对于理解在低IFT时的表面活性剂行为至关重要.
- 传统方法可能在非常低的IFT值下难以准确测量.
研究的目的:
- 评估用于测量低IFT时油水界面膨胀模块的旋转滴法.
- 为了比较四种不同类型的表面活性剂的界面膨胀模量.
- 为了将表面活性物质结构与界面膜特性和模量值相关联.
主要方法:
- 使用旋转滴法来确定油水界面扩展模量.
- 研究了四种表面活性剂:二甲基硫酸盐 (SDS),Triton X-100 (TX100),基硫 (ASB) 和基聚氧乙烯硫酸盐 (S-C13PO13S).
- 在不同的表面活性剂度和低IFT条件 (<10 mN/m) 中测量模量.
主要成果:
- 证实了滴法对IFT<10mN/m的有效性.
- 在IFT<1mN/m时观察到SDS和TX100的快速模量下降.
- 硫贝 (ASB) 由于其独特的水友性结构,表现出最高的模量 (50 mN/m).
- S-C13PO13S 显示出适度的平原模量 (30 mN/m),归因于其聚氧烯链.
结论:
- 滴法适用于在低IFT方案中表征表面活性物质.
- 表面活性剂的分子结构显著影响了界面扩展模量.
- 定制表面活性剂结构 (例如,贝他因,长PO链) 可以创建强大的界面薄膜,以改善乳化和油位移.
更多相关视频
相关概念视频
02:57Surface Tension, Capillary Action, and Viscosity
27.4K
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...
27.4K
01:22Surface Tension of Fluid
216
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...
216
01:09Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model
264
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
264
01:16Surface Tension and Surface Energy
1.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
1.3K
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
681
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
681
02:24Ideal Solutions
19.0K
According to Raoult’s law, the partial vapor pressure of a solvent in a solution is equal or identical to the vapor pressure of the pure solvent multiplied by its mole fraction in the solution. However, Raoult's Law is only valid for ideal solutions. For a solution to be ideal, the solvent-solute interaction must be just as strong as a solvent-solvent or solute-solute interaction. This suggests that both the solute and the solvent would use the same amount of energy to escape to the...
19.0K