Multi-Encapsulation Combination of O/W/O Emulsions with Polyurea Microcapsules for Controlled Release and Safe Application of Dimethyl Disulfide
Autor: | Aocheng Cao, Hongyan Cheng, Yuan Li, Zhiqiang Zhou, Wensheng Fang, Qiuxia Wang, Bin Huang, Zhaoxin Song, Lirui Ren, Dongdong Yan, Daqi Zhang |
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Rok vydání: | 2020 |
Předmět: |
Phytophthora
Thermogravimetric analysis Materials science Sulfide Polymers Fumigation Plastic film Capsules 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Anti-Infective Agents Fusarium Animals General Materials Science Dimethyl disulfide Disulfides Tylenchoidea Soil Microbiology Polyurea Active ingredient chemistry.chemical_classification Drug Carriers 021001 nanoscience & nanotechnology Controlled release 0104 chemical sciences Drug Liberation chemistry Delayed-Action Preparations Emulsions Cucumis sativus 0210 nano-technology Nuclear chemistry |
Zdroj: | ACS Applied Materials & Interfaces. 13:1333-1344 |
ISSN: | 1944-8252 1944-8244 |
DOI: | 10.1021/acsami.0c16613 |
Popis: | Dimethyl disulfide (DMDS), a promising alternative fumigant, has been highly desirable for excellent management of soil pests and diseases. However, high volatility and moderate toxicity of this sulfide limit its application. To address these issues, a novel controlled release formulation of DMDS was proposed employing multiple emulsions and polyurea microcapsules (DMDS@MEs-MCs). The successful combination of the two technologies was revealed by confocal laser scanning microscopy, scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared. According to the multiple encapsulation structure, the encapsulation efficiency decreased by only 3.13% after thermal storage, compared with a 15.21% decrease of microcapsules made with only a monolayer film. DMDS@MEs-MCs could effectively control the release of active ingredient, which increased applicator and environmental safety during application. Moreover, it could be facilely used by spraying and drip irrigation instead of a special fumigation device. The innovative formulation exhibited better control efficacy on soil pathogens (Fusarium spp. and Phytophthora spp.) and root-knot nematodes (Meloidogyne spp.) than DMDS technical concentration (DMDS TC). In addition, it did not inhibit seed germination after 10 days when the plastic film was removed from the fumigated soil. This method appears to be of broad interest for the development of safe and handy fumigant application. |
Databáze: | OpenAIRE |
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