How does substrate hydrophobicity affect the morphological features of reconstituted wax films and their interactions with nonionic surfactant and pesticide?

Hu, Xuzhi; Pambou, Elias; Gong, Haoning; Liao, Mingrui; Hollowell, Peter; Liu, Huayang; Wang, Weimiao; Bawn, Carlo; Cooper, Jonathan; Campana, Mario; Ma, Kun; Li, Peixun; Webster, John R. P.; Padia, Faheem; Bell, Gordon; Lu, Jian R.

doi:10.1016/j.jcis.2020.04.043

Cited by 18 publications

(16 citation statements)

References 35 publications

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“…Surfactant-mediated wetting and spreading of droplets is common . In recent years, research on the interaction between surfactants and pesticide liquids in agricultural fields has emerged . The present work has investigated the interaction mechanism of pathogen-modified hydrophobic surfaces with mixtures of surfactants and pesticides.…”

Section: Resultsmentioning

confidence: 99%

“…11 In recent years, research on the interaction between surfactants and pesticide liquids in agricultural fields has emerged. 5 The present work has investigated the interaction mechanism of pathogen-modified hydrophobic surfaces with mixtures of surfactants and pesticides. Through the dynamic behavior of droplet wetting and spreading, including the dynamic contact angle, diameter, height, three-phase contact line speed, pinning force, and contact angle hysteresis, it was proven that droplets with added surfactants could spread freely on cucumber powdery mildew leaves at various growth stages.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Interactions between droplets and solid surfaces influence a wide range of behaviors in nature and technical applications, such as spray painting, drag reduction, cosmetics, medicines, pesticides, etc. When pesticides are sprayed, the droplets encounter a variety of conditions on leaf surfaces. , The situation is even more complex when droplets are sprayed on plant surfaces that have already been modified by disease-causing pathogens .…”

Section: Introductionmentioning

confidence: 99%

“…Interactions between droplets and solid surfaces influence a wide range of behaviors in nature and technical applications, such as spray painting, 1 drag reduction, 2 cosmetics, 3 medicines, 4 pesticides, 5 etc. When pesticides are sprayed, the droplets encounter a variety of conditions on leaf surfaces.…”

Section: ■ Introductionmentioning

confidence: 99%

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Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms

Ding

et al. 2021

J. Agric. Food Chem.

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Hydrophobic surfaces modified by pathogens in agricultural production are one of the main reasons to reduce the utilization of pesticides. Adding surfactants to pesticide solutions is a common method to improve their wetting and spreading properties. In this work, the interaction mechanism between pathogen-modified hydrophobic surfaces and mixtures of surfactants and a pesticide was studied in detail. The interaction mechanism was determined by characterizing the wetting and spreading behaviors of droplets on cucumber powdery mildew leaves at different growth stages. When surfactants were added, droplets on cucumber powdery mildew leaves were in the Wenzel wetting state, the pinning force weakened, the contact line speed accelerated, and the adhesion force increased. We explained the micellar state and aggregation behavior of surfactant molecules in a pesticide solution that was applied to the surface of cucumber powdery mildew leaves. Droplets of solutions containing nonionic surfactants easily formed semibald micelles, binding to the pathogen of powdery mildew, whereas droplets containing cationic surfactants did not do so. Because of the electrostatic interaction between cationic surfactant molecules and powdery mildew pathogens, cationic surfactant molecules did not wet the pathogens very well, so we suggest adding nonionic surfactants rather than cationic surfactants to improve the wetting and spreading of pesticide solutions on cucumber powdery mildew leaves. This study provides new insights into enhancing the wetting and deposition of droplets on pathogen-modified hydrophobic surfaces.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms

Ding

et al. 2021

J. Agric. Food Chem.

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“…Surface charging mechanisms in nonpolar media is far from being well understood even though they are important for many practical applications, such as the development of electrophoretic displays and tribo-electricity nanogenerators, , stabilization of pesticide products, as well as measurements of enzyme activity …”

Section: Introductionmentioning

confidence: 99%

Modulation of Surface Charge by Mediating Surface Chemical Structures in Nonpolar Solvents with Nonionic Surfactant Used as Charge Additives

Chen

Ashani

et al. 2021

J. Phys. Chem. C

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One of the major challenges in controlling the colloidal stability in nonpolar solvents concerns their surface charging strength. By tuning surface chemical structures in nonpolar solvents, the surface charge can be modulated with nonionic surfactants used as charge additives. In this study, various self-assembled monolayers (SAMs) were coated onto specific surfaces and nanoparticles to obtain different chemical structures. X-ray photoelectron spectroscopy (XPS) and atomic force microscope (AFM) measurements were used to quantify surface chemical structures, whereas dynamic adsorption experiments and molecular dynamics (MD) simulation were utilized to study the influence of these structures on surfactant adsorption behavior. Surface charging optimization was achieved by mediating the concentration of electron acceptors and donors, which is reflected as matching the alkyl length of SAMs with an appropriate concentration of hydroxyl group on the surfaces. The charging strength of particles decreased above a certain surfactant concentration, which is attributed to the competition between surfactant adsorption stability and charge neutralization effect generated via the disproportionation process.

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How surfactants affect the depuration of polycyclic aromatic hydrocarbons adsorbed on the mangrove leaf surfaces: insight from an in situ method

Guo

Wei

Zhu

et al. 2022

Environ Sci Pollut Res

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How does substrate hydrophobicity affect the morphological features of reconstituted wax films and their interactions with nonionic surfactant and pesticide?

Cited by 18 publications

References 35 publications

Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms

Regulating Droplet Wetting and Pinning Behaviors on Pathogen-Modified Hydrophobic Surfaces: Strategies and Working Mechanisms

Modulation of Surface Charge by Mediating Surface Chemical Structures in Nonpolar Solvents with Nonionic Surfactant Used as Charge Additives

How surfactants affect the depuration of polycyclic aromatic hydrocarbons adsorbed on the mangrove leaf surfaces: insight from an in situ method

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