Release-controlled microcapsules of thiamethoxam encapsulated in beeswax and their application in field

Huang, Yanmin; Hu, Qiang; Cui, Guoqin; Guo, Xiaoyan; Wei, Bangzhi; Gan, Chunfang; Li, Weiguo; Mo, Dongmei; Lu, Rui; Cui, Jianguo

doi:10.1080/03601234.2019.1697588

Cited by 14 publications

(12 citation statements)

References 39 publications

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“…As shown in Figure 3b, the peaks that were observed at 3387 cm −1 (O-H stretching vibration), 2892 cm −1 (symmetric stretching vibration of C-H), 1645 cm −1 (originated from the absorbed water), 1418, 1373, and 1316 cm −1 (bending vibration of CH, CH2, OH, respectively), 1160 cm −1 (C-O-C asymmetric vibration), 1062 and 895 cm −1 (C-O stretching of the pyranose ring skeleton and the glycosidic linkages between glucose units in cellulose) belong to CNCs, respectively [42][43][44]. In the case of TMX, the strong peaks appeared at 1598 and 1521 cm −1 in the TMX spectrum (Figure 3a), which correspond to C=N and NO2 stretching frequencies, respectively [4,45,46]. The TMX-loaded CNCs spectrum (Figure 3c) shows most of the major characteristic bands corresponding to CNCs and TMX.…”

Section: Ft-ir Spectroscopymentioning

confidence: 97%

“…Regarding TMX encapsulation, challenges exist as there are limited reports of this procedure in literature [12]. Using beeswax as wrapping matrix (Thiamethoxam/beeswax-kaolin) microcapsules, Huang et al [4] developed two types of Thiamethoxam , which had an entrapment efficiency of 82.0% and 72.1%, respectively.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

“…According to the data from the United Nations Food and Agriculture Organization (FAO), pesticides can save 30% of the total crop production losses worldwide [2,3]. However, they also cause several adverse impacts on our life and ecosystems because of their toxicity to humans and non-target organisms [4]. Unfortunately, depending on the modes of application and environmental conditions, over 90% of the traditional pesticide formulations are lost or decomposed owing to degradation, evaporation, leaching, and runoff during field application, and onlỹ 0.1% of the pesticide can ultimately affect harmful target pests [1,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Cellulose Nanocrystals Loaded with Thiamethoxam: Fabrication, Characterization, and Evaluation of Insecticidal Activity against Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

et al. 2020

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Using smart nanopesticide formulations based on nanomaterials can offer promising potential applications for decreasing pesticide residues and their effects on human health and the environment. In this study, a novel nanoformulation (NF) of thiamethoxam (TMX) was fabricated using the solvent evaporation method through loading TMX on cellulose nanocrystals (CNCs) as the carrier. The synthesized TMX-CNCs was investigated through different techniques, such as Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), and thermogravimetric analysis (TGA). The results revealed that the loading efficiency and entrapment efficiency were 18.7% and 83.7 ± 1.8% for TMX, respectively. The prepared nanoformulation (TMX-CNCs) had a width of 7–14 nm and a length of 85–214 nm with a zeta potential of −23.6 ± 0.3 mV. The drug release behavior study exhibited that the release of TMX from TMX-loaded CNCs was good and sustained. Furthermore, bioassay results showed that the insecticidal activity of TMX-CNCs against Phenacoccus solenopsis was significantly superior to that of the technical and commercial formulation, as indicated by the lower LC50 value. The results indicate that the TMX nanoformulation has great potential for application in agriculture for pest control.

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Section: Ft-ir Spectroscopymentioning

confidence: 97%

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cellulose Nanocrystals Loaded with Thiamethoxam: Fabrication, Characterization, and Evaluation of Insecticidal Activity against Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

et al. 2020

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“…Numerous materials can be used for encapsulation and the choice of capsule material determines the physical and chemical properties of the capsule. Encapsulating an active material has the following advantages: The capsule material (1) keeps the active material from contacting the external environment and prevents its degradation and the loss of its activity [ 2 ]; (2) extends the half-life of the active material [ 3 ]; (3) allows sustained release [ 4 ]; and (4) reduces the evaporation and degradation of volatile substances [ 5 ]. Owing to these desirable properties, microcapsules have been widely used in pollutant adsorption, food quality preservation, stem cell culture and biomedicine [ 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Sustained-Release Performance of PLGA Microcapsule Carrier System

et al. 2021

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Microcapsules have been widely studied owing to their biocompatibility and potential for application in various areas, particularly drug delivery. However, the size of microcapsules is difficult to control, and the size distribution is very broad via various encapsulation techniques. Therefore, it is necessary to obtain microcapsules with uniform and tailored size for the construction of controlled-release drug carriers. In this study, emulsification and solvent evaporation methods were used to prepare a variety of ovalbumin-loaded poly (lactic-co-glycolic acid) (PLGA) microcapsules to determine the optimal preparation conditions. The particle size of the PLGA microcapsules prepared using the optimum conditions was approximately 200 nm, which showed good dispersibility with an ovalbumin encapsulation rate of more than 60%. In addition, porous microcapsules with different pore sizes were prepared by adding a varying amount of porogen bovine serum albumin (BSA) to the internal water phase. The release curve showed that the rate of protein release from the microcapsules could be controlled by adjusting the pore size. These findings demonstrated that we could tailor the morphology and structure of microcapsules by regulating the preparation conditions, thus controlling the encapsulation efficiency and the release performance of the microcapsule carrier system. We envision that this controlled-release novel microcapsule carrier system shows great potential for biomedical applications.

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“…The functionalization of microcapsules can be realized by coating different kinds of core materials [ 2 ]. At present, microcapsule technology is widely used in biomedicine [ 3 ], agriculture [ 4 ] and architecture [ 5 ]. As a kind of functional microcapsule, thermochromic reversible microcapsules have gradually become the focus of attention [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Optical Properties of Thermochromic Reversible Waterborne Primer Film on Tilia europaea with 1,2-Benzo-6-diethylaminofluorane Based Microcapsules

Wang

Yan

2020

Polymers

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A waterborne thermochromic primer film containing thermochromic reversible microcapsules on the surface of Tilia europaea was prepared. The influences of different microcapsule concentrations on the reversible thermochromic, optical, mechanical and liquid resistance properties of the primer films were investigated. Not only were the morphology and structure of microcapsules and films observed, but also the chemical compositions of the microcapsules and films were analyzed. The results showed that for the primer film with microcapsules, the microcapsule concentration had a more significant influence on color difference. The primer film with microcapsules can achieve thermochromic reversibility. The temperature of color change was 32 °C and it had a good color recovery. The film gloss was negatively correlated with the microcapsule concentration, and the film with 5.0%–15.0% concentration had the best gloss. Adding an appropriate concentration of microcapsules can effectively improve the mechanical properties of the film. The film with 0–15.0% microcapsules had better liquid resistance to detergent, i.e., grade 1. The bonding form between the primer film added with microcapsules and Tilia europaea was physical bonding. This study provides a technical reference for the development of modern intelligent discoloration wood products.

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Release-controlled microcapsules of thiamethoxam encapsulated in beeswax and their application in field

Cited by 14 publications

References 39 publications

Cellulose Nanocrystals Loaded with Thiamethoxam: Fabrication, Characterization, and Evaluation of Insecticidal Activity against Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

Cellulose Nanocrystals Loaded with Thiamethoxam: Fabrication, Characterization, and Evaluation of Insecticidal Activity against Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae)

Preparation and Sustained-Release Performance of PLGA Microcapsule Carrier System

Mechanical and Optical Properties of Thermochromic Reversible Waterborne Primer Film on Tilia europaea with 1,2-Benzo-6-diethylaminofluorane Based Microcapsules

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