Synthesis and hard water resistance mechanism of polycarboxylate dispersant for pesticide water dispersible granules

Tian, Qingmei; Zhang, Yanyan; Jia, Zhiyu; Zhang, Qiang

doi:10.1080/01932691.2019.1638270

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…Pesticides are generally hydrophobic and thus hardly dispersed in aqueous solution, which must be processed into pesticide formulations for effective applications . Indeed, some precisely designed pesticide and medicine are less effective due to the self-aggregation, mainly because of the high intermolecular hydrophobic or Pi–Pi interactions. − Indeed, BBR has a low solubility in water, , which limits its applications both as a pesticide and herbal medicine.…”

Section: Discussionmentioning

confidence: 99%

Molecular Basis of the Reinforced Effect of Berberine against Cutinase from Colletotrichum capsisi by Supplying Sodium Stearate as Dispersant

Liu

Chen

et al. 2022

ACS Appl. Bio Mater.

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Berberine (BBR) is a promising botanical pesticide that can reduce the enzyme activity of secreted cutinase from fungal pathogens. However, only less than 15% of total activity was prohibited. Herein we researched BBR’s self-aggregation in water via molecular dynamics simulations, and further investigated the effect of dispersant on blocking the aggregation together with the impact on cutinase. Strong hydrophobic interactions were found between adjacent BBR molecules, and these molecules formed clustered conformations at different BBR concentrations. Interestingly, one of the tested dispersants, sodium stearate (ST), is able to insert into BBR clusters and form stable interaction until the end of simulation, resulting in decreased hydrophobic strength in the BBR-ST cluster. More importantly, supply of ST with BBR resulted in BBR’s reinforced hydrophobic interactions between BBR and the catalytic center of cutinase, which led to the inactivated mode of cutinase. Finally, wet experiments demonstrated that combined application of BBR and ST indeed resulted in a synergy-like effect on reducing the activity of cutinase. Overall, our findings revealed the mechanism of the reinforced effect of BBR against cutinase when supplying ST as dispersant, suggesting an undiscovered role of ST in enhancing the efficiency of this botanical pesticide.

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Section: Discussionmentioning

confidence: 99%

Molecular Basis of the Reinforced Effect of Berberine against Cutinase from Colletotrichum capsisi by Supplying Sodium Stearate as Dispersant

Liu

Chen

et al. 2022

ACS Appl. Bio Mater.

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“…Polycarboxylate dispersant is an anionic dispersant that is commonly used in pesticide suspension concentrate, and it has good dispersing properties [13,14]. It uses electrostatic repulsion and steric hindrance to prevent the aggregation of ultrafine solid particles in the suspension system and improve the stability of suspension concentrate [15].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Properties of Comb-Shaped Polycarboxylate Dispersant onto Different Crystal Pyraclostrobin Particle Surfaces

et al. 2020

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The stability of the suspension system of the two crystal forms of pyraclostrobin is evaluated using multiple light technology, and the adsorption performance of polycarboxylate dispersant on the surface of two different crystalline pyraclostrobin particles is compared in combination with XRD, FTIR, XPS, and SEM from the microscopic view. The adsorption kinetics and thermodynamics studies of 2700 on the surfaces of different crystalline forms of pyraclostrobin particles show that the adsorption process of 2700 on the surfaces of pyraclostrobin crystal forms II and IV conform to pseudo-second-order kinetic adsorption model. The Ea values for crystal forms II and IV are 12.93 and 14.39 kJ∙mol−1, respectively, which indicates that both adsorption processes are physical adsorption. The adsorption models of 2700 on the surfaces of pyraclostrobin crystal forms II and IV are in accordance with Langmuir adsorption isotherms. The ∆Gad values of crystal forms II and IV are negative and the ∆Sad values are positive at different temperatures. Therefore, the adsorption processes are spontaneous and accompanied by entropy increase. The results of this study provide an important theoretical basis for the selection of polycarboxylate dispersants in the suspension of pyraclostrobin. This study also provides a reference for the research of polycrystalline pesticide suspension concentrate.

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“…Recently, sodium salt of methacrylic acid/styrene/ sodium p-styrene sulfonate copolymer (SMSS) has synthesized a novel dispersant by free radical polymerization mechanism. This new dispersant has strong resistance to hard water and showed high performance and show above 90% suspensibility in hard water [12].…”

Section: Recent Advancements In Agrochemical Formulationsmentioning

confidence: 99%

Vital Role of IPFT in Development of New-Generation Pesticide Formulation for Crop Protection: Advancement Overview in Asian Countries

Iqbal¹,

Agrawal²,

Alam³

et al. 2022

Agricultural Development in Asia - Potential Use of Nano-Materials and Nano-Technology

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The agricultural sector of Asian countries supports 60% of the global population, accounting one-fifth of the world’s agricultural land. Despite the gap between demand and supply of food is gradually increasing due to the damages caused by insect and other pest attacks on the limited agricultural land, the pest attack has influenced the entire agriculture sector either directly or indirectly, causing socioeconomic losses. To combat, farmers have been using conventional agrochemicals nonjudiciously that lead to adverse effects such as pesticide resistance, environmental contamination, and non-target toxicity. In this regard, new-generation agrochemical formulation techniques are advantageous over conventional pesticides and play a vital role in sustainable agriculture by fulfilling the demand of over-rising food supply to feed the increasing population. These formulations exhibit desired bio-efficacy at lower doses and have minimum possibility to leave pesticide residues in crop products and the environment. Institute of Pesticide Formulation Technology (IPFT), Gurugram, is one of the leading institutes in Asia, which is actively engaged in developing new-generation formulations to deliver safer, efficient, and environment-friendly pesticide formulations. So far, IPFT has developed 60 pesticide formulations and transferred technologies to different agrochemical industries globally. The new-generation formulations developed by IPFT mainly include microemulsion, nanoemulsion, capsulated suspension, nano-encapsulation, an emulsion in water, mixed formulations including several botanical pesticide formulations. The new advancement in pesticide delivery systems is very supportive in combating the crisis faced by the agricultural sector. In this chapter, formulation of different new-generation pesticides and their advancement are summarized.

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Synthesis and hard water resistance mechanism of polycarboxylate dispersant for pesticide water dispersible granules

Cited by 11 publications

References 26 publications

Molecular Basis of the Reinforced Effect of Berberine against Cutinase from Colletotrichum capsisi by Supplying Sodium Stearate as Dispersant

Molecular Basis of the Reinforced Effect of Berberine against Cutinase from Colletotrichum capsisi by Supplying Sodium Stearate as Dispersant

Adsorption Properties of Comb-Shaped Polycarboxylate Dispersant onto Different Crystal Pyraclostrobin Particle Surfaces

Vital Role of IPFT in Development of New-Generation Pesticide Formulation for Crop Protection: Advancement Overview in Asian Countries

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