基于水凝胶体系的磷酸根响应控释农药释放行为分析

引用本文: 陈超文, 刘彬, 吴正岩. 基于水凝胶体系的磷酸根响应控释农药释放行为分析[J]. 分析化学, 2020, 48(11): 1583-1589. doi: 10.19756/j.issn.0253-3820.201498 shu

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

基于水凝胶体系的磷酸根响应控释农药释放行为分析

陈超文 ^1,2, ,
刘彬 ^1,2, ,
吴正岩 ^{1,
,}

1.
中国科学院合肥物质科学研究院, 合肥 230031;
2.
中国科学技术大学, 合肥 230026

通讯作者: 吴正岩,zywu@ipp.ac.cn

基金项目:
本文系中国科学院科技服务网络（STS）计划项目（No.KFJ-STS-QYZD-115）资助

摘要: 基于Fe³⁺与羧甲基纤维素钠（CMC）的交联作用，制备了以凹凸棒土（ATP）为载体、吡虫啉（IM）为目标农药分子的基于水凝胶的磷酸根（PO₄^3-）响应控释农药体系（PCRPH）。利用扫描电镜、X射线衍射等表征了PCRPH。结果表明，PCRPH与PO₄^3-相互作用，主要发生溶胀和Fe³⁺解离。随着PO₄^3-浓度增大，PCRPH中分子间距增加并逐步解离，能有效促进内部IM分子向外扩散，实现农药的可控释放，提高农药利用率。释放动力学分析表明，IM在PO₄^3-溶液中的释放过程属于Fickian扩散。此外，溶液中IM的释放量大小不受共存阴离子Cl^-及pH值的影响，具有良好的稳定性，但提高温度能促进IM从PCRPH中释放。

关键词:

English

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

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).

Abstract: 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.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

基于水凝胶体系的磷酸根响应控释农药释放行为分析

通讯作者: 吴正岩,zywu@ipp.ac.cn

English

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

Corresponding author: WU Zheng-Yan, zywu@ipp.ac.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于水凝胶体系的磷酸根响应控释农药释放行为分析

通讯作者: 吴正岩,zywu@ipp.ac.cn

English

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Corresponding author: WU Zheng-Yan, zywu@ipp.ac.cn

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