Emulsion-based synchronous pesticide encapsulation and surface modification of mesoporous silica nanoparticles with carboxymethyl chitosan for controlled azoxystrobin release

Xu, Chunli; Cao, Lidong; Zhao, Pengyue; Zhou, Zhaolu; Cao, Chong; Li, Fengmin; Huang, Qiliang

doi:10.1016/j.cej.2018.05.008

Cited by 168 publications

(85 citation statements)

References 52 publications

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“…Recently, MSNs have also been extensively used as carriers to control the release of pesticides in the agriculture field [25,26,27,28,29,30]. During the pursuit of an ideal carrier for a pesticide, our group has also prepared surface-decorated versatile MSNs and investigated the controlled release profiles of cargo molecules [31,32,33]. Moreover, we also studied the translocation, distribution and degradation patterns of pesticide encapsulated MSNs in cucumber plants [34,35].…”

Section: Introductionmentioning

confidence: 99%

Sulfonate-Functionalized Mesoporous Silica Nanoparticles as Carriers for Controlled Herbicide Diquat Dibromide Release through Electrostatic Interaction

Shan

Cao

et al. 2019

IJMS

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Environmental stimuli-responsive pesticide release is desirable for enhanced efficiency and reduced side effects. In most cases, the loading and release of pesticides mainly depends on hydrophobic interactions and hydrogen bonding. Electrostatic interaction is less investigated as a weapon for achieving high loading content and controlled pesticide release. In this work, negative-charge decorated mesoporous silica nanoparticles (MSNs) were facilely fabricated by introducing sulfonate groups onto MSNs through a post-grafting method. Sulfonate-functionalized MSNs (MSN-SO3) were synthesized by conversion of epoxy group into sulfonate group using a bisulfite ion as a ring opening reagent. Diquat dibromide (DQ), one of the globally used quaternary ammonium herbicides, was efficiently loaded into these negatively charged MSN-SO3 nanoparticles. The loading content was increased to 12.73% compared to those using bare MSNs as carriers (5.31%). The release of DQ from DQ@MSN-SO3 nanoparticles was pH and ionic strength responsive, which was chiefly governed by the electrostatic interactions. Moreover, DQ@MSN-SO3 nanoparticles exhibited good herbicidal activity for the control of Datura stramonium L., and the bioactivity was affected by the ionic strength of the release medium. The strategy of cargo loading and release dependent on the electrostatic interactions could be generally used for charge-carrying pesticides using carriers possessing opposite charges to mitigate the potential negative impacts on the environment.

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Section: Introductionmentioning

confidence: 99%

Sulfonate-Functionalized Mesoporous Silica Nanoparticles as Carriers for Controlled Herbicide Diquat Dibromide Release through Electrostatic Interaction

Shan

Cao

et al. 2019

IJMS

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“…The azoxystrobin release curve profiles were estimated in MeOH/H 2 O (50:50, v/v ) release medium [ 26 , 27 ]. The lyophilized microspheres with equivalent active ingredient were put in a dialysis bag (MWCO 2000 Da) containing 3 mL of release medium.…”

Section: Methodsmentioning

confidence: 99%

Antagonistic Effect of Azoxystrobin Poly (Lactic Acid) Microspheres with Controllable Particle Size on Colletotrichum higginsianum Sacc

et al. 2018

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Size-controlled azoxystrobin-poly (lactic acid) microspheres (MS) were prepared by an oil/water emulsion solvent evaporation approach. The hydrated mean particle sizes of the MS1, MS2, and MS3 aqueous dispersions were 130.9 nm, 353.4 nm, and 3078.0 nm, respectively. The drug loading and encapsulation efficiency of the azoxystrobin microspheres had a positive relationship with particle size. However, the release rate and percentage of cumulative release were inversely related to particle size. The smaller-sized microspheres had a greater potential to access the target mitochondria. As a result, the more severe oxidative damage of Colletotrichum higginsianum Sacc and higher antagonistic activity were induced by the smaller particle size of azoxystrobin microspheres. The 50% lethal concentrations against Colletotrichum higginsianum Sacc of MS1, MS2, and MS3 were 2.0386 μg/mL, 12.7246 μg/mL, and 21.2905 μg/mL, respectively. These findings reveal that particle size is a critical factor in increasing the bioavailability of insoluble fungicide.

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“…There are two approaches developed to select carrier systems or encapsulating agents for pesticides. The first approach focuses on synthetic materials such as mesoporous alumina [ 62 ], polymers [ 13 ], metal–organic frameworks [ 63 ], carbon nanotubes [ 64 ], and mesoporous/hollow silica [ 13 , 65 ]. One of the major drawbacks while using synthetic materials is their impact on soil chemistry, which will have to suffer a new stressor in the form of nonbiodegradable nanoparticles (NPs).…”

Section: Encapsulation Of Pesticidesmentioning

confidence: 99%

“…Various polysaccharides such as CS, starch, and alginates are used in pure form or in combination with other materials to encapsulate pesticides [ 43 , 44 , 62 , 65 , 68 ]. CS is a cationic linear chain polyaminosaccharide obtained from alkaline deacetylation of chitin.…”

Section: Encapsulation Of Pesticidesmentioning

confidence: 99%

Recent advances in biodegradable matrices for active ingredient release in crop protection: Towards attaining sustainability in agriculture

Pirzada

Farias

Mathew

et al. 2020

Current Opinion in Colloid & Interface Science

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Climate changes, emerging species of plant pests, and deficits of clean water and arable land have made availability of food to the ever-increasing global population a challenge. Excessive use of synthetic pesticides to meet ever-increasing production needs has resulted in development of resistance in pest populations, as well as significant ecotoxicity, which has directly and indirectly impacted all life-forms on earth. To meet the goal of providing safe, sufficient, and high-quality food globally with minimal environmental impact, one strategy is to focus on targeted delivery of pesticides using eco-friendly and biodegradable carriers that are derived from naturally available materials. Herein, we discuss some of the recent approaches to use biodegradable matrices in crop protection, while exploring their design and efficiency. We summarize by discussing associated challenges with the existing approaches and future trends that can lead the world to more sustainable agricultural practices.

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Emulsion-based synchronous pesticide encapsulation and surface modification of mesoporous silica nanoparticles with carboxymethyl chitosan for controlled azoxystrobin release

Cited by 168 publications

References 52 publications

Sulfonate-Functionalized Mesoporous Silica Nanoparticles as Carriers for Controlled Herbicide Diquat Dibromide Release through Electrostatic Interaction

Sulfonate-Functionalized Mesoporous Silica Nanoparticles as Carriers for Controlled Herbicide Diquat Dibromide Release through Electrostatic Interaction

Antagonistic Effect of Azoxystrobin Poly (Lactic Acid) Microspheres with Controllable Particle Size on Colletotrichum higginsianum Sacc

Recent advances in biodegradable matrices for active ingredient release in crop protection: Towards attaining sustainability in agriculture

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