Wetting behavior and mechanism of wetting agents on low-energy surface

Wang, Hui; Wang, Chongqing; Fu, Jiangang; Gu, Guohua

doi:10.1016/j.colsurfa.2013.01.063

Cited by 34 publications

(6 citation statements)

References 21 publications

(29 reference statements)

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“…This means that the efficiency of pesticides is affected by its retention on plant leaf surfaces, and it is especially closely related to the poor wettability of pesticide droplets on plant leaf surfaces [2]. Wetting behavior has attracted significant attention due to its wide applications in coating, gluing, and agriculture [3,4]. Therefore, understanding the wetting behavior of pesticide solutions is one of the most important factors in improving the efficacy of pesticides.…”

Section: Introductionmentioning

confidence: 99%

“…While plant leaf surfaces cannot be changed artificially, effective and simple approaches to improving the wettability of pesticide droplets mainly involve amending the liquid properties of pesticides by adding surfactants into pesticide formulations [7,8]. Apart from the fact that surface free energy (SFE) influences solid surfaces(i.e., solid surfaces that are hard to wet always have a low surface free energy) [4], the aforementioned approach is considered to be a simple method because surfactants can help to reduce the surface tension of pesticide solutions.…”

Section: Introductionmentioning

confidence: 99%

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

Zhu

Cao

et al. 2019

Molecules

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zhu

Cao

et al. 2019

Molecules

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“…When the WPU sizing is coated on the surface of the substrate, a part of the NHSi is at the bottom of the coating, and it contacts with the wetted surface. The lipophilic segment like siloxane fragment is adsorbed on the solid surface, and the hydrophilic group extends outward to the water [29]. The contact between water and substrate was changed to the contact between water and hydrophilic group of NHSi, and a sandwich structure with surfactant as intermediate layer is formed [30].…”

Section: The Determination Of Contact Anglementioning

confidence: 99%

The Synthesis of Nonionic Hyperbranched Organosilicone Surfactant and Characterization of Its Wetting Ability

et al. 2020

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In this research, the epoxy silicone oil and self-made hydroxyl-terminated hyperbranched polymer (HBP-OH) were used to synthesis the nonionic hyperbranched organosilicone surfactant (NHSi). The molar rate of hydroxyl groups of HBP-OH and epoxy groups of epoxy silicon oil (n-OH: n-epoxy) was adjusted from 5:1~60:1 to prepare a series of NHSi. The Gel Permeation Chromatography (GPC), Fourier Transform Infrared Spectroscopy (FT-IR), contact angle measuring instrument, surface tensiometer and Scanning Electron Microscope (SEM) were employed to characterize the structure and property of HBP-OH and NHSi. GPC analysis indicated that the Mn of HBP-OH was 340.5. FT-IR analysis showed that with the increase of molar rate of n-OH:n-epoxy, the peak intensity of –OH increased. The prepared NHSi was then used to prepare the water solution. The lowest surface tension of NHSi solution was 24.71 mN·m−1 when the n-OH:n-epoxy was 30:1 in the preparation process. The minimum water contact angle of waterborne polyurethane (WPU) emulsion by adding 2% of NHSi was 14.85° on the surface of glass. The wetting experiments showed that the NHSi has good wetting ability to fixed sea-island superfine fiber synthetic material.

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“…11,12 Herein, microbubbles removed lipophilic plastics from hydrophilic components by selective adherence. 13 Compared with other separation technologies, the flotation has the advantage of customizing surface wettability. 14 Because polymers are inherently hydrophobic, an advanced wettability regulation should be proposed to avoid the low efficiency of plastic hydrophilization.…”

Section: Introductionmentioning

confidence: 99%

“…As an emerging separation technology, froth flotation favors plastic separation within a size of 1–5 mm. , Herein, microbubbles removed lipophilic plastics from hydrophilic components by selective adherence . Compared with other separation technologies, the flotation has the advantage of customizing surface wettability .…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Catalytic Peroxide Oxidation Inducing Surface Reactions Toward Flotation Extraction of Hazardous Poly(Vinyl Chloride) From Waste Plastics

Zhang,

Wang,

Yalikun

et al. 2023

Ind. Eng. Chem. Res.

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Low separation efficiency is a stumbling block for the recycling of heterogeneous waste plastics, which initiates the invasion of hazardous plastic pollutants, such as microplastics. The froth flotation controlled by wettability regulation strategies has become a promising remediation scheme and separation technology for plastic mixtures. Herein, this research proposed a wettability regulation for waste plastics from advanced oxidation processes (AOPs) that was heterogeneous Fenton reactions catalyzed by green tea extract-reducing iron nanoparticles (GTFe 0 NPs). In the heterogeneous catalysis system (GTFe 0 NPs/H 2 O 2 ), the GTFe 0 NP catalyst excited HO • production and the reactive HO • was a major species for plastic oxidation. Besides, surface reactions on plastics were illustrated to explain the hydrophilic pattern of acrylonitrile− butadiene−styrene (ABS), polystyrene (PS), and polycarbonate (PC). HO • radicals can attack olefinic double bonds, abstract alkane protons, and scissor carbonate groups, anchoring hydroxyl and carboxyl groups on polymer surfaces. The flotation process separated hydrophilic ABS, PS, and PC plastics from hydrophobic hazardous poly(vinyl chloride) (PVC) plastics. The recovery and purity of PVC could reach 100 and 97.6%. The mild modification temperature, wide pH value, and low oxidant concentration determined its potential application in separating hazardous plastics. Simplifying the plastic composition benefits plastic recycling and prevents environmental risks.

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Wetting behavior and mechanism of wetting agents on low-energy surface

Cited by 34 publications

References 21 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

The Synthesis of Nonionic Hyperbranched Organosilicone Surfactant and Characterization of Its Wetting Ability

Heterogeneous Catalytic Peroxide Oxidation Inducing Surface Reactions Toward Flotation Extraction of Hazardous Poly(Vinyl Chloride) From Waste Plastics

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