Long‐lasting phosphorescent microcapsules based on in‐situ polymerization method for damage sensing

Zhang, Haohui; Li, Yao; Wang, Qing; Zhao, Yayun

doi:10.1002/stc.3131

Cited by 1 publication

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It also reduces skin irritation and toxicity of some pesticides to users and delays the development of resistance to the target. There are various methods for the preparation of microcapsules, including in situ polymerization, 14 interfacial polymerization, 15,16 emulsion polymerization, 17 double-emulsion method, 18 and solvent evaporation. 19 Interfacial polymerization is one of the most commonly used methods to produce pesticide microcapsules; it has the unique advantages of high encapsulation rate, good thermal stability, and good slow release and has become the mainstream method for microcapsule preparation in the field of pesticide preparation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation, Characterization, and Bioactivity Evaluation of Lambda-Cyhalothrin Microcapsules for Slow-Controlled Release System

Wang,

Liu,

Gao

et al. 2024

ACS Omega

View full text Add to dashboard Cite

The utilization of interfacial polymerization in the preparation of microcapsules with a slow-controlled release has been shown to effectively improve pesticide efficacy and reduce environmental pollution. In this study, polyurea microcapsules loaded with lambda-cyhalothrin were prepared by an interfacial polymerization method using modified isocyanate (MDI) as the wall material and GT-34 as the initiator. The microcapsules were fully characterized by optical microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, etc., and release behaviors were investigated. The results indicated that the microcapsules had a smooth surface and uniform distribution, the average particle size of the microcapsules was 1.97 μm, and the encapsulation efficiency of lambda-cyhalothrin microcapsules could reach 91.48%. Compared with other commercial formulations, the microcapsules exhibited an excellent sustained release property (>7 days) in a 50% acetonitrile aqueous solution (v/v). Subsequently, in vitro release studies showed that the lambda-cyhalothrin microcapsules could consistently control the release of the core materials at different pH, temperature, and MDI addition amount conditions. The release of lambda-cyhalothrin microcapsules was in accordance with the first-order model release, which was mainly by the Fickian diffusion mechanism. Furthermore, the biological activity on Myzus persicae showed that the microcapsules’ persistence period was above 21 days, which was longer than that for the emulsifiable concentrate formulation.

show abstract