Organosilicone surfactant performance in agricultural spray application: a review

Knoche, Moritz

doi:10.1111/j.1365-3180.1994.tb01990.x

Cited by 96 publications

(74 citation statements)

References 44 publications

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“…A shorter adsorption time corresponds to a faster migration rate of the superspreaders. In addition, the surface tension at 100 s increased in the following order: S 6 (EO) 4 (27.90 mN/m), which is consistent with the above obtained equilibrium surface tension. Fig.…”

Section: Dynamic Spreading Behavior Of the Surfactants On Plant Leaf supporting

confidence: 89%

“…Because superspreaders reduce the surface tension of water and induce a surface tension gradient, they enable spray solutions to rapidly and completely wet waxy leaf surfaces, thereby increasing the amount of spray retained on the leaf. As a result, superspreaders can increase the reliability of spray applications by improving the delivery of agrochemicals [4].…”

Section: Introductionmentioning

confidence: 99%

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A gemini-type superspreader: Synthesis, spreading behavior and superspreading mechanism

Lin

Wang

Bai

et al. 2017

Chemical Engineering Journal

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Please cite this article as: A gemini-type superspreader: synthesis, spreading behavior and superspreading mechanism, Chemical Engineering Journal (2016), doi: http://dx.doi.org/10. 1016/j.cej.2016.12.132 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ABSTRACTThis paper describes the facile microwave-assisted synthesis of a series of trisiloxane gemini superspreaders, as well as their surface and aggregation properties and superspreading behavior on plant leaf surfaces. The molecular structures of the trisiloxane gemini surfactants were characterized by Fourier transform infrared spectroscopy (FTIR) and 1 H nuclear magnetic resonance spectroscopy ( 1 H NMR). The obtained thermodynamic parameters showed that an increase in the spacer group (CH 2 ) resulted in decreases in the critical aggregation concentration (CAC), corresponding surface tension (γ CAC ), and surface excess concentration (Γ max ) but increases in the occupied area per surfactant molecule (A CAC ) and absolute values of the standard free energies of aggregation (△G θ mic ) and adsorption (△G θ ads ). An increase in ethoxy units (CH 2 -CH 2 -O-) resulted in increases in the CAC, γ CAC , and A CAC but decreases in Г max and the absolute values of △G θ mic and △G θ ads . The transmission electron microscopy and dynamic light scattering results showed that the average sizes of the aggregates of superspreader solutions increased with an increasing number of spacer units (CH 2 ) but decreased with an increasing number of ethoxy units (CH 2 -CH 2 -O-). The dynamic spreading behavior results demonstrated that the average spreading velocity increased with increasing spacer chain length, and the dependence of the maximum spreading velocity on the ethoxy chain length was nonmonotonous with a maximum at n(EO) = 8.68. The optimal HLB value was essential to obtaining good superspreading behavior, and the substrate wettability (hydrophobic rice plant and hydrophilic mango plant surfaces) greatly influenced the superspreading. The synergistic effects from the precursor film and Marangoni effect existed in the proposed superspreading model.

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Section: Dynamic Spreading Behavior Of the Surfactants On Plant Leaf supporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

A gemini-type superspreader: Synthesis, spreading behavior and superspreading mechanism

Lin

Wang

Bai

et al. 2017

Chemical Engineering Journal

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“…Acid and base catalyzed hydrolytic cleavage of the silicone-oxygen bonds has been investigated [Stevens, 1993;Knoche, 1994;Sun, 1996;Nikolov, 2011] and occurs readily below a pH of 5 and above pH 9. In addition, the surfactant has been reported to degrade in neutral aqueous environment after forty days [Peng, 2009].…”

Section: Antifoam 747mentioning

confidence: 99%

Organics Characterization Of DWPF Alternative Reductant Simulants, Glycolic Acid, And Antifoam 747

White

Wiedenman

Crump

et al. 2013

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“…The unique composition and molecular structure of organic Si allows it to exhibit organic and inorganic characteristics. In agriculture, organic Si exhibits low surface tension and surface energy (Knoche, 1994;Deng et al, 2002). Organic Si added to insecticides and herbicides can increase the effectiveness of pest control (Liu et al, 2010).…”

Section: Research Articlementioning

confidence: 99%

Do organic silicon and imidacloprid synergistically induce toxicity to the new invasive mealybug Phenacoccus solenopsis Tinsley on Portulaca grandiflora plants?

Huang¹,

Zhang²,

Wang³

et al. 2014

Turk J Agric For

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Organosilicone surfactant performance in agricultural spray application: a review

Abstract: cone surfactants may offer advantages over conventional surfactants, but require some precautions if their full potential is to be utilized.

Cited by 96 publications

References 44 publications

A gemini-type superspreader: Synthesis, spreading behavior and superspreading mechanism

A gemini-type superspreader: Synthesis, spreading behavior and superspreading mechanism

Organics Characterization Of DWPF Alternative Reductant Simulants, Glycolic Acid, And Antifoam 747

Do organic silicon and imidacloprid synergistically induce toxicity to the new invasive mealybug Phenacoccus solenopsis Tinsley on Portulaca grandiflora plants?

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