Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect

Liu, Jiangyu; Guo, Xinyu; Xu, Yong; Wu, Xuemin

doi:10.3390/molecules26051408

Cited by 10 publications

(8 citation statements)

References 35 publications

(27 reference statements)

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“…Water-soluble polymers used in polymer flooding are, by themselves, anionic surfactants [ 71 , 72 ]. The propagation of surfactants in the reservoir reduces the surface tension [ 71 , 72 , 73 , 74 , 75 , 76 ]. If the polymer solution contains more surfactant additives, the resulting complex of polymer molecules and surfactants has a molecular weight greater than the molecular weight of the polymer and, therefore, a higher-viscosity polymer solution.…”

Section: Polymer Flooding—field Scalementioning

confidence: 99%

Evaluating Factors Impacting Polymer Flooding in Hydrocarbon Reservoirs: Laboratory and Field-Scale Applications

Khlaifat,

Fakher,

Harrison

2023

Polymers

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Polymer flooding is an enhanced oil recovery (EOR) method used to increase oil recovery from oil reservoirs beyond primary and secondary recovery. Although it is one of the most well-established methods of EOR, there are still continuous new developments and evaluations for this method. This is mainly attributed to the diverse polymers used, expansion of this method in terms of application, and the increase in knowledge pertaining to the topic due to the increase in laboratory testing and field applications. In this research, we perform a review of the factors impacting polymer flooding in both laboratory studies and field-based applications in order to create guidelines with respect to the parameters that should be included when designing a polymer flooding study or application. The main mechanism of polymer flooding is initially discussed, along with the types of polymers that can be used in polymer flooding. We then discuss the most prominent parameters that should be included when designing a polymer flooding project and, based on previous laboratory studies and field projects, discuss how these parameters impact the polymer itself and the flooding process. This research can provide guidelines for researchers and engineers for future polymer flooding research or field applications.

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Section: Polymer Flooding—field Scalementioning

confidence: 99%

Evaluating Factors Impacting Polymer Flooding in Hydrocarbon Reservoirs: Laboratory and Field-Scale Applications

Khlaifat,

Fakher,

Harrison

2023

Polymers

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“…Surface tension is an essential property of liquids. Matrine SL and OD were diluted with deionized water 50-, 500-, and 1000-fold to form aqueous solutions (due to the low content of effective components in matrine SL, only 50-fold and 500-fold dilutions were used in this research), and the SST of each diluted solution was measured with an optical contact angle gauge (DSA-100, German KRUSS) [37]. Each sample was tested thrice, and the average value was calculated.…”

Section: Determination Of Wettability 241 Static Surface Tension (Sst)mentioning

confidence: 99%

Formulation of Matrine Oil-Based Suspension Concentrate for Improving the Wetting of Droplets and Spraying Performance

Wang

Meng

et al. 2023

Agronomy

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Matrine is an efficient, low-toxicity, and environmentally friendly botanical pesticide; however, it is mainly applied as a soluble concentrate (SL) with a limited utilization rate that is unsuitable for ultra-low-volume spraying and unmanned aerial vehicles. Therefore, a matrine formulation (such as an oil-based suspension concentrate, OD) is more effective. In this study, matrine ODs were prepared with three kinds of emulsifiers (VO/02N, VO/03, and VO/01). The storage stability, suspensibility, viscosity, surface tension, contact angle, droplet density, fraction of coverage, maximum retention, indoor control, effect of adhesion tension, and adhesion work of matrine ODs were studied. All three types of matrine ODs had favorable stability, and the wetting and spraying performance of the matrine ODs were more effective than those of the matrine SLs. Among the three types of matrine ODs, the viscosity, wettability, spray performance, and maximum retention of the suspension made with emulsifier VO/03 were superior to those of the other two emulsifiers, and they were more effective in controlling Spodoptera frugiperda. Increasing the solution concentration improved the spreading velocity of the droplets on the solid surface and the wettability. The matrine OD prepared from emulsifier VO/03 had the most effective wettability and spraying properties, and it can be used for ultra-low-volume spraying and aerial application. This study offers new insights into the efficient use of plant-based pesticides.

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“…The self-propulsion of solid grains and liquid droplets at interfaces is one of such phenomena, and nowadays, various systems and their motion modes have been reported as examples of active matter. − In some cases, such systems have been developed for use as models of biological systems, whose physical motions are driven by chemical energy under isothermal conditions. In other cases, they have been studied for the construction of drug delivery systems , or commercially used as labor-saving herbicides that spread over a paddy field just by delivering a pack of their grains to one spot of the field. − …”

Section: Introductionmentioning

confidence: 99%

Flow-Driven Self-Propulsion of Oil Droplet on a Surfactant Solution Surface, as Observed by Time-Resolved Interfacial Tension and Surface Flow Speed Measurements

Nomoto,

Kimura,

Chiari

et al. 2024

Langmuir

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The imbalanced force of the interfacial tension applied to an object has often been taken into account in the analysis of the motion mechanism of self-propelled systems. However, heterogeneous distributions of the interfacial tension also cause Marangoni flows, and these flows also contribute to the self-propulsion through the viscous force. The contribution of such flows has not been observed directly, while the interfacial tension difference has been measured in some systems. In this study, simultaneous measurements of the interfacial tension and surface flow speed of the unidirectional self-propelled motion of a butyl salicylate (BS) droplet in a circular channel on a sodium dodecyl sulfate (SDS) aqueous solution were achieved by the quasi-elastic laser scattering method. The droplet position was also recorded by observing its fluorescence excited by a UV light. The BS droplet speed dependence of the interfacial tension and surface flow speed were measured by varying the initial BS concentration codissolved in the SDS aqueous solution. As a result, a periodic decrease of the interfacial tension and a periodic increase of the speed of both forward and backward flows were observed when the droplet passed the sampling position of the time-resolved measurements. When they were converted to the distribution in space of the droplet position, no droplet speed dependence of the interfacial tension difference between the front and rear of the droplet was observed. On the other hand, the speed of both forward and backward flows increased as the droplet speed increased. By analysis of the above results with a simplified model, it was clarified that the forward flow driven by the interfacial tension gradient at the droplet front is actually important in the mechanism of the unidirectional self-propelled motion of a droplet.

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Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect

Cited by 10 publications

References 35 publications

Evaluating Factors Impacting Polymer Flooding in Hydrocarbon Reservoirs: Laboratory and Field-Scale Applications

Evaluating Factors Impacting Polymer Flooding in Hydrocarbon Reservoirs: Laboratory and Field-Scale Applications

Formulation of Matrine Oil-Based Suspension Concentrate for Improving the Wetting of Droplets and Spraying Performance

Flow-Driven Self-Propulsion of Oil Droplet on a Surfactant Solution Surface, as Observed by Time-Resolved Interfacial Tension and Surface Flow Speed Measurements

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