What happens when pesticides are solubilized in nonionic surfactant micelles

Hu, Xuzhi; Gong, Haoning; Li, Zongyi; Ruane, Sean; Liu, Huayang; Pambou, Elias; Bawn, Carlo; King, Stephen M.; Ma, Kun; Li, Peixun; Padia, Faheem; Bell, Gordon; Lu, Jian R.

doi:10.1016/j.jcis.2019.01.056

Cited by 38 publications

(20 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Nonionic surfactants were dissolved in D2O or mixture of D2O and H2O at a concentration of 10 times its critical micellar concentration (CMC) (0.067mM) [25] and CP was then solubilised into the surfactants at 20°C using our previous method [13].…”

Section: Materials and H/d-wax Preparationsmentioning

confidence: 99%

“…The SLD values for all the samples used in this experiment. The SLD values, except d-wax, were taken from previous studies [13,14,22,23].…”

Section: Neutron Reflectivity (Nr)mentioning

confidence: 99%

“…The thickness for each layer (from the wax/OTS interface to the dense/sparse wax interface) was 12 Å, 13 Å and 25 Å, respectively. The division of these layers helped take into account of the volume of the head group of C12E6 which is slightly larger than that of its tail (volume ratio:1.08:1) [13]. In comparison, the wax protrusion layer was almost evenly divided into 4 layers to handle changes in wax volume fraction.…”

Section: Nr Measurements Of Interaction Between Wax Film On the Ots Surface With C12e6 And Cpmentioning

confidence: 99%

“…As a result, pesticide solubilisation generally alters micellar phase boundaries by decreasing the cloud point and changes in micellar shape. Our recent study has revealed the structural changes of the nonionic surfactant micelles including elongation of the overall shape and shrinkage and dehydration of the shell, resulting in increased micellar hydrophobicity [13]. Dissolution of wheat waxes into the pesticide saturated micelles can trigger the release of the pesticides from the micelles due to the re-equilibration of the micellar system [14].…”

Section: Introductionmentioning

confidence: 99%

“…To enhance the structural sensitivity of NR and trace the surfactant and pesticide molecule, it is beneficial to deuterate surfactants and vary the isotopic contrasts of the solvent in addition to the introduction of the deuterated waxes. Building from our previous studies [13,14,22,23], we again selected Cyprodinil (CP, 4-cyclopropyl-6-methyl-N-phenylpyrimidin-2-amine) as a model fungicide and saturated it into the micelles of nonionic surfactant hexaethylene glycol monododecyl ether (C12E6). Wheat waxes were chosen as their average molecular structure has been well characterised [14].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

Pambou

Gong

et al. 2020

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

Section: Materials and H/d-wax Preparationsmentioning

confidence: 99%

“…The SLD values for all the samples used in this experiment. The SLD values, except d-wax, were taken from previous studies [13,14,22,23].…”

Section: Neutron Reflectivity (Nr)mentioning

confidence: 99%

Section: Nr Measurements Of Interaction Between Wax Film On the Ots Surface With C12e6 And Cpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Pambou

Gong

et al. 2020

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

A comparative study on physicochemical and micellar solubilization performance between monoglucosyl rebaudioside A and rebaudioside A

et al. 2021

View full text Add to dashboard Cite

BACKGROUND Rebaudioside A (RA) and its monoglucosyl derivative, as like rebaudioside D (RD) are the most popular stevia glycosides but possess poor solubility in water, which limited their application as edible surfactants, the applications as in micellar solubilization and drug delivery. Meanwhile, effect of the monoglucosyl attached to RA moiety remains unclear. RESULTS Monoglucosyl rebaudioside A (RAG1) was synthesized via hydrolyzing the transglycosylation product of RA with 95% of RA converted. RAG1 content in raw reaction mixture was as high as 69.5% of total glycosides, and harvested with a content of 88.2% by simple filtration. The RAG1 exhibited an aqueous solubility of 87 folds of RA or 391 folds of RD at 25 °C. The surface activity of RAG1 solution was higher than RA and invincible to RD. The RAG1 micelles promoted aqueous solubility of idebenone (IDE) up to 500 folds higher at 25 °C. The cumulative release rate of IDE encapsulated in RAG1 micelles was 777.5% or 456.7% higher of that of free IDE in simulated gastric/intestinal fluids in 14 h, respectively. The RAG1‐IDE remained the same in 98 days at 25 °C. CONCLUSION The α‐linked glucosyl to RA induced higher hydrophilicity and surface activity than that resulted by β‐linked glucosyl, making RAG1 not only dramatically raise the aqueous solubility of RA, but also endow IDE folds higher in bioaccessibility, yet making the capsule stable at storage. The results would provide a new edible delivery nanocarrier for encapsulation of hydrophobic bioactive components. © 2021 Society of Chemical Industry.

show abstract

New piperidinium surfactants with carbamate fragments as effective adjuvants in insecticide compositions based on imidacloprid

Kushnazarova,

Mirgorodskaya,

Vasilieva

et al. 2024

Pest Management Science

View full text Add to dashboard Cite

BACKGROUNDSurfactants, particularly non‐ionic ones, are widely used as adjuvants in pesticide formulations due to their ability to maintain pesticide effectiveness without changing solution properties, such as pH. While non‐ionic surfactants are generally low‐toxic, stable, and excellent dispersants with high solubilization capabilities, they may be less effective than cationic surfactants, which offer superior surface activity, transport properties, and antimicrobial action. This study investigates the efficacy of new piperidinium surfactants with carbamate fragments as adjuvants in insecticide formulations containing imidacloprid. The efficacy of these formulations is being assessed against greenhouse whitefly, a pest known to harm cultivated and ornamental flowering plants.RESULTSThe aggregation behavior of piperidinium surfactants containing carbamate fragments was investigated, and their wetting effect was evaluated. Synthesized surfactants have lower CMC values compared to their methylpiperidinium analogue. The effect of piperidinium surfactants on the insecticide concentration on the surface and inside tomato leaves was assessed using spectrophotometric methods. It was found that the introduction of piperidinium surfactants with carbamate fragment at a concentration of 0.1% wt. allows for decrease in lethal concentration of imidacloprid up to 10 times, thereby testifying the marked increase in the effectiveness of imidacloprid against the greenhouse whitefly insect pest (Trialeurodes vaporariorum). It was shown that the main factors responsible for the enhanced efficacy of the insecticide were the ability of the surfactant to increase the concentration of imidacloprid on the leaf surfaces and improve their penetration into the plant.CONCLUSIONThe presented work employed a comprehensive approach, which significantly increases the generalizability of the results obtained and provides the ability to predict the effect and target selection of adjuvants. © 2024 Society of Chemical Industry.

show abstract

What happens when pesticides are solubilized in nonionic surfactant micelles

Cited by 38 publications

References 34 publications

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

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

A comparative study on physicochemical and micellar solubilization performance between monoglucosyl rebaudioside A and rebaudioside A

New piperidinium surfactants with carbamate fragments as effective adjuvants in insecticide compositions based on imidacloprid

Contact Info

Product

Resources

About