The wetting behavior of aqueous surfactant solutions on wheat (Triticum aestivum) leaf surfaces

Zhang, Chenhui; Zhao, Xin; Lei, Jian; Ma, Yue; Du, Fengpei

doi:10.1039/c6sm02387h

Cited by 66 publications

(57 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To date, the wetting behavior of surfactant solutions on abiotic solid surfaces has been extensively researched [9,10,11,12,13]. In comparison to abiotic solid surfaces, the wetting behavior of plant surfaces is more complicated, as seen in wheat [14], ginkgo leaves [15], and rice [16]. It is very common to add a surfactant into a pesticide to obtain controllable efficiency by improving the solution wettability on a given plant.…”

Section: Introductionmentioning

confidence: 99%

Wetting Behavior and Maximum Retention of Aqueous Surfactant Solutions on Tea Leaves

Zhu

Cao

et al. 2019

Molecules

Self Cite

View full text Add to dashboard Cite

In this research, the maximum retention and wetting behavior of surfactant solutions (N-200, N-300, Tween-80, Morwet EFW, DTAB, SDS) on the surfaces of tea leaves was investigated based on surface free energy, surface tension, the contact angle, adhesion work, and adhesion force. The results showed that the contact angles of all surfactant solutions were kept constant with low adsorption at the tea leaf–liquid interfaces below 0.005%. With an increase in concentration, the contact angle of Tween-80 decreased sharply because the adsorption of molecules at the solid–liquid interfaces (ΓSL’) was several times greater than that at the liquid–air interfaces (ΓLV). Adhesion work decreased sharply and then reached a minimum at the critical micelle concentration (CMC), but then increased until reaching a constant. Moreover, a high adhesion force did not indicate better wettability, as it does with rose petals and peanut leaves. For tea leaf surfaces, an increase in the contact angle brought about an increase in the adhesion force. In addition, the maximum retention for Morwet EFW is at different concentrations compared to N-200, N-300, Tween-80, DTAB, and SDS, where the maximum retention of Morwet EFW on tea leaves was 6.05 mg/cm2 at 0.005%.According to the mechanisms of wetting behavior on plant surfaces, a recipe for pesticide formulation can be adjusted with better wettability to reduce loss, improve utilization efficiency, and alleviate adverse effects on the environment.

show abstract

Section: Introductionmentioning

confidence: 99%

Wetting Behavior and Maximum Retention of Aqueous Surfactant Solutions on Tea Leaves

Zhu

Cao

et al. 2019

Molecules

Self Cite

View full text Add to dashboard Cite

show abstract

“…Functionalized coatings are essentially films where a specific component with useful properties is desired at either the top or bottom of the film in a stratified configuration. Coatings can impart properties ranging from wettability, to glossiness, to deterred bacterial growth onto surfaces [1][2][3] . Controlled particle position during film formation is also applicable to inkjet printing, pesticide applications, flexible electronic device fabrication, production of paints and stains, and bulk heterojunction deposition in photovoltaics [4][5][6][7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Evidence of Stratification in Binary Colloidal Films from Microbeam X-ray Scattering: Toward Optimizing the Evaporative Assembly Processes for Coatings

Carr

Liu

Yager

et al. 2018

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Colloidal films have many important applications where a layered configuration is desirable, including flexible electronics, anti-reflective coatings, and anti-microbial paints. We report stratification during evaporative film formation in binary colloidal dispersion, probed using a novel microbeam small-angle X-ray scattering (SAXS) technique. To our knowledge, SAXS approaches have not been used to experimentally obtain quantitative data of concentration profiles in multicomponent colloidal films. We measured the local scattering of a film at different vertical locations using a microfocused X-ray beam and determined particle concentrations at different film depths using a linear combination analysis of the mixed film and pure film scattering data. Using small particle size ratios ranging from 2.55 to 1.25, we experimentally observed and quantify three distinct stratification configurations: inverted smallon-top, large-on-top, and no stratification. Our results show some agreement with a previously proposed stratification state diagram, although there are some limitations. Experimental verification of these stratification phenomena is critical to fully understanding the physics of particle movement and structure development during film formation, which is crucial for optimizing evaporative assembly processes for coatings.

show abstract

“…The SFE values for houseflies were calculated using the OWRK method on the basis of the Berthelot hypothesis . By using contact angle values of four test liquids (water, formamide, ethylene glycol and dimethyl formamide) on housefly surfaces, the SFEs of housefly wing and notum can be calculated according to Eqn …”

Section: Resultsmentioning

confidence: 99%

\frac{(1 + \cos θ) \cdot γ_{italicLV}}{2 \sqrt{γ_{LV}^{d}}} = \sqrt{γ_{SV}^{p}} \sqrt{\frac{γ_{italicLV}^{p}}{γ_{italicLV}^{d}}} + \sqrt{γ_{SV}^{d}},

where θ is the contact angle, γ LV ,

γ_{italicLV}^{d}

and

γ_{italicLV}^{p}

are the surface tension, the dispersion and polar components of liquid surface tension, and

γ_{italicSV}^{d}

and

γ_{italicSV}^{p}

represent the dispersive and polar portions of solid surface tension, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…It was assumed that SDS and DTAB differ in their dispersive components, which are related to not only the hydrophobic groups of surfactants, but also the aggregation morphology in surfactant solution . Because biomaterials have a negative charge, electronegative housefly surfaces may affect the aggregation morphology of the two oppositely charged ionic surfactants and alter the polarity of the solution. In addition, the lower contact angles reveal that wing parts are somewhat easier to wet using surfactant solutions at the same concentrations.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The wetting behavior of three different types of aqueous surfactant solutions on housefly (Musca domestica) surfaces

Wan

Zhao

et al. 2019

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND It is difficult for insecticide spray droplets to adhere to highly hydrophobic pest surfaces, and this is an important reason behind the low utilization of pesticides. Greater understanding of the wetting behaviors of agro‐surfactants on pest surfaces is of great importance in pesticidal applications. RESULTS This research investigated the wetting processes of three surfactant solutions [TritonX‐100 (TX‐100), sodium dodecyl sulfate (SDS) and dodecyl trimethyl ammonium bromide (DTAB)] on housefly surfaces based on surface tension, contact angles and solid–liquid interaction. As the surfactant concentration increased, the wetting abilities of the solutions improved due a decrease in liquid surface tension. The decrease in contact angles followed an inverted ‘S’ shape until the concentration exceeded the critical micelle concentration, at which point surfactant adsorption was saturated at the interfaces. The nonionic surfactant TX‐100 enhanced wettability more than the ionic surfactants SDS and DTAB. The wetting states of the three surfactant solutions on housefly surfaces transformed to the Wenzel state when the surfactant molecules adsorbed at solid–liquid interfaces (ΓSL) were 3.09–5.36 times higher than those adsorbed at liquid–air interfaces (ΓLV). More insecticides attached to housefly surfaces and pesticide utilization was significantly improved after adding TX‐100 to the pesticide solution. CONCLUSION Surfactant TX‐100 could be a practical and efficient candidate adjuvant for insecticide spraying of houseflies. This research investigated the wetting mechanism of three different types of surfactant solutions on housefly surfaces, and could provide effective guidance for the preparation of insecticide formulations and pesticide adjuvants with better wettability to improve pesticide utilization. © 2019 Society of Chemical Industry

show abstract

The wetting behavior of aqueous surfactant solutions on wheat (Triticum aestivum) leaf surfaces

Cited by 66 publications

References 45 publications

Wetting Behavior and Maximum Retention of Aqueous Surfactant Solutions on Tea Leaves

Wetting Behavior and Maximum Retention of Aqueous Surfactant Solutions on Tea Leaves

Evidence of Stratification in Binary Colloidal Films from Microbeam X-ray Scattering: Toward Optimizing the Evaporative Assembly Processes for Coatings

The wetting behavior of three different types of aqueous surfactant solutions on housefly (Musca domestica) surfaces

Contact Info

Product

Resources

About