Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 65, Issue 48, Pages 10445-10451Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b04220
Keywords
controlled release; herbicide; biodegradable polymer; halloysite nanotubes; leaching
Funding
- National Natural Science Foundation of China [51703063]
- Provincial Produce-Learn-Research Projects of Guangdong [2013B090500085]
- Provincial Public Interest Research and Special Capacity Building of Guangdong [2014B030303004]
- Cooperative Innovation Project of Guangzhou [201508010022]
- Special Fund for Applied Science and Technology Research of Guangdong [2015B020235010]
- Fundamental Research Funds for the Central Universities [2017BQ033]
- China Postdoctoral Science Foundation [2017M612658]
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Commercial herbicide atrazine (AT) was first loaded into the lumen of halloysite nanotubes (HNTs) in the amount of 9 wt %, and then the AT-loaded HNTs (HNTs-AT) were further incorporated into poly(vinyl alcohol)/starch composites (PVA/ST, with the weight ratio of 80/20) to construct a dual drug delivery system. AT loaded in nanotubes displayed much slower release from PVA/ST film in water than free AT; for example, the total release amount of AT from PVA/ST film with loaded AT was only 61% after 96 h, while this value reached 97% in PVA/ST film with free AT. The release behavior of AT from PVA/ST film with HNTs-AT was first dominated by the mechanism of matrix erosion and then by the mechanism of Fickian diffusion. In addition, combining HNTs and PVA/ST blends together in the controlled release of herbicide also reduced its leaching through the soil layer, which would be useful for diminishing the environmental pollution caused by pesticide.
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