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Citation: CHEN Chao-Wen, LIU Bin, WU Zheng-Yan. Release Behavior of Hydrogel-based PO₄^3--responsive Controlled Release Pesticide[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(11): 1583-1589. doi: 10.19756/j.issn.0253-3820.201498 shu

Release Behavior of Hydrogel-based PO₄^3--responsive Controlled Release Pesticide

CHEN Chao-Wen ^1,2 ,
LIU Bin ^1,2 ,
WU Zheng-Yan ^1,,

1.
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
2.
University of Science and Technology of China, Hefei 230026, China

Corresponding author: WU Zheng-Yan, zywu@ipp.ac.cn
Received Date: 15 August 2020
Revised Date: 12 September 2020

Fund Project: This work was supported by the Science and Technology Service Programs of Chinese Academy of Sciences (No. KFJ-STS-QYZD-115).

Phosphate anion (PO₄^3-)-responsive controlled release pesticide based on hydrogel (PCRPH) was developed based on crosslinking effect between ferric ion (Fe³⁺) and sodium carboxymethylcellulose (CMC). In PCRPH, attapulgite (ATP) was served as carrier for loading imidacloprid (IM). The scanning electron microscope (SEM) and X-ray diffraction (XRD) results demonstrated that PCRPH in PO₄^3- solution might swell and disaggregate, which could be enhanced as the PO₄^3- contents in solution increase. As a result, the controlled-release of IM inside hydrogel could occur so that the utilization rate of pesticide was improved. According to the release kinetics analysis, the release mechanism of IM from PCRPH was consistent with the Fickian diffusion law. The release amount of IM from PCRPH remained stable against the coexisting Cl^- and different pH, whereas temperature displayed positive relation with the release rate of IM.
- Sodium carboxymethylcellulose,
- Ferric ion,
- Attapulgite,
- Imidacloprid,
- Phosphate anion,
- Controlled release hydrogel
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通讯作者: 陈斌, bchen63@163.com

Release Behavior of Hydrogel-based PO₄^3--responsive Controlled Release Pesticide