Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 26, Issue 24, Pages 25107-25116Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-019-05804-9
Keywords
Carboxymethyl cellulose; Dimethyldiallylammonium chloride; Avermectin; Sustained release; Stimuli responsiveness
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Funding
- National Natural Science Foundation of China [21576303, 21606262]
- Natural Science Foundation of Guangdong Province [2016A030313375, 2017A030311003]
- Science and Technology Program of Guangzhou, China [201604020054, 201904020068]
- National Key R&D Program of China [2018YFD0200306]
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The overdosage use of pesticide was harmful to the environment and human health, which was mainly caused by the low utilization rate of the pesticide. However, the pesticide microcapsule with sustained-release and stimulating response properties could effectively solve this problem. Preparation of carboxymethyl cellulose grafting dimethyldiallylammonium chloride (CMC-g-PDMDAAC) through grafting polymerization and trapping as well as encapsulation of avermectin (AVM) via electrostatic interactions resulted in the formation of AVM/CMC-g-PDMDAAC microcapsules. The results showed that the particle size was 200 similar to 300 nm. The encapsulation efficiency was as high as 72.06%. Furthermore, the remaining rate of encapsulated AVM increased from 50.0 to 81.60% after UV irradiation for 359 min. The microcapsules exhibited significant enzyme and pH stimuli responsiveness. Finally, CMC-g-PDMDAAC had no significant difference effect on the toxicity of AVM, AVM could be found, and DMDAAC featured a synergistic effect on the toxicological effects of AVM.
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