The Role of Wettability on the Response of a Quartz Crystal Microbalance Loaded with a Sessile Droplet

Murray, Brandon; Narayanan, Shankar

doi:10.1038/s41598-019-53233-y

Cited by 15 publications

(4 citation statements)

References 43 publications

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“…The evaporation process of the sessile droplets was measured using a quartz crystal microbalance (Figure b) that is highly sensitive to changes in the temporal droplet radius. , We observed that the droplet evaporating on the planar surface (without cellulose coating) initially followed a constant contact radius (CCR) regime, during which the liquid–solid contact line was pinned while the contact angle and the droplet height decreased as the evaporation continued followed by a depinning period where the contact line contracted until the evaporation was completed. In contrast, for the substrate covered by the cellulose thin film, the droplet remained evaporating in a constant contact radius mode for most of its lifetime due to the capillary-driven spreading and imbibition in the presence of the porous medium, leading to a much accelerated evaporation process .…”

Section: Resultsmentioning

confidence: 99%

Porous Cellulose Thin Films as Sustainable and Effective Antimicrobial Surface Coatings

Kiratzis

Adoni

et al. 2023

ACS Appl. Mater. Interfaces

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In the present work, we developed an effective antimicrobial surface film based on sustainable microfibrillated cellulose. The resulting porous cellulose thin film is barely noticeable to human eyes due to its submicrometer thickness, of which the surface coverage, porosity, and microstructure can be modulated by the formulations and the coating process. Using goniometers and a quartz crystal microbalance, we observed a threefold reduction in water contact angles and accelerated water evaporation kinetics on the cellulose film (more than 50% faster than that on a flat glass surface). The porous cellulose film exhibits a rapid inactivation effect against SARS-CoV-2 in 5 min, following deposition of virus-loaded droplets, and an exceptional ability to reduce contact transfer of liquid, e.g., respiratory droplets, to surfaces such as an artificial skin by 90% less than that from a planar glass substrate. It also shows excellent antimicrobial performance in inhibiting the growth of both Gram-negative and Gram-positive bacteria (Escherichia coli and Staphylococcus epidermidis) due to the intrinsic porosity and hydrophilicity. Additionally, the cellulose film shows nearly 100% resistance to scraping in dry conditions due to its strong affinity to the supporting substrate but with good removability once wetted with water, suggesting its practical suitability for daily use. Importantly, the coating can be formed on solid substrates readily by spraying, which requires solely a simple formulation of a plant-based cellulose material with no chemical additives, rendering it a scalable, affordable, and green solution as antimicrobial surface coating. Implementing such cellulose films could thus play a significant role in controlling future pan- and epidemics, particularly during the initial phase when suitable medical intervention needs to be developed and deployed.

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Section: Resultsmentioning

confidence: 99%

Porous Cellulose Thin Films as Sustainable and Effective Antimicrobial Surface Coatings

Kiratzis

Adoni

et al. 2023

ACS Appl. Mater. Interfaces

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“…The success of hydrocarbon recovery from conventional and unconventional reservoirs depends on the affinity of the reservoir rock for the oil/water system (Agbalaka et al, 2008;Murray and Narayanan, 2019;Ahmadi et al, 2020;Alhammad et al, 2022;Rego et al, 2022;Yekeen et al, 2023). The foremost reason for treating the quartz surface with MB is to alter the wettability from hydrophobic to hydrophilic conditions and improve hydrocarbon recovery from the matured reservoirs (Zhang et al, 2007;Kamal et al, 2017;Li et al, 2018a;Omran et al, 2020;Tackie-Otoo et al, 2022;Alhammad et al, 2023b).…”

Section: Resultsmentioning

confidence: 99%

The effect of methylene blue and organic acids on the wettability of sandstone formation: Implications for enhanced oil recovery

Alhammad,

Ali,

Yekeen

et al. 2023

Capillarity

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Fossil fuels are the primary global energy source, and their improved production will ensure a balance between the increasing energy demand and supply. Chemical-enhanced oil recovery has been well thought of as a promising method for increasing hydrocarbon production. However, the effectiveness of this method depends on wettability of rock-oilbrine systems' Previous studies have shown that oil-wet rock demonstrated a water-wet state when treated with surface active chemicals like surfactants, nanofluids. Moreover, increasing attention has become focused on the application of hazardous pollutants such as methyl orange and methylene blue to enhance the CO 2 /H 2 containment security of the host rock by altering its wettability. Nevertheless, the capacity of methylene blue to modify the rock wettability for the production of trapped hydrocarbons in sandstone reservoirs is yet to be explored. Thus, in the present study, methylene blue is used as a wettability modifier to enhance the oil production from quartz rocks that have been aged with stearic acid solution (10-2 mol/L). First, the organic-aged quartz is treated with various concentrations of methylene blue (10-100 mg/L) for one week at 60 °C. Then, contact angle measurements are performed at different temperatures (25 and 50 °C) under various pressures (10-20 MPa) and brine salinities (0-0.3 M). Thus, the quartz is found to turn hydrophobic when aged in organic acid/n-decane solution at 20 MPa and 50 °C. However, when the rock is treated with various concentrations of methylene blue, the hydrophobicity is found to decrease, thus suggesting that oil recovery will be promoted by methylene blue treatment. Overall, the results demonstrate that the most favourable condition for reducing the hydrophobicity of the sandstone rock is via treatment with 100 mg/L methylene blue. Hence, the injection of methylene blue into deep underground sandstone reservoirs has the potential to produce more residual hydrocarbons.

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“…Wettability and droplet evaporation plays an important role in nature, daily life, and many technological applications, manufacturing engineering, chemical and medical products. Understanding the interaction and wetting dynamic of droplets with various surfaces, and the complex mechanisms of drying processes is essential [1,2]. Moreover, the formation of drying defects and watermarks (WM), after the wet cleaning procedures in the semiconductor industry, has been identified as a serious problem [3].…”

Section: Background Motivation and Objectivementioning

confidence: 99%

C4.2 - Application of Ultrasonic Shear Wave Measurements for the Assessment of Hydrophobicity and Drying Dynamics of Aqueous Droplets

Bampouri,

Buckin

2023

Lectures

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The paper describes the application of ultrasonic shear wave measurements for the assessment of hydrophobicity of various surfaces and real-time non-destructive monitoring of the process of aqueous droplet evaporation. This research focuses on the quantification of surface hydrophobicity expressed through aqueous droplet contact angle and the study of the kinetics of droplet evaporation including evaporation modes (pinned and unpinned) and the characterization of watermarks left after drying.

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The Role of Wettability on the Response of a Quartz Crystal Microbalance Loaded with a Sessile Droplet

Cited by 15 publications

References 43 publications

Porous Cellulose Thin Films as Sustainable and Effective Antimicrobial Surface Coatings

Porous Cellulose Thin Films as Sustainable and Effective Antimicrobial Surface Coatings

The effect of methylene blue and organic acids on the wettability of sandstone formation: Implications for enhanced oil recovery

C4.2 - Application of Ultrasonic Shear Wave Measurements for the Assessment of Hydrophobicity and Drying Dynamics of Aqueous Droplets

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