期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 1, 页码 1192-1201出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b03469
关键词
pH-responsively; Controlled-release; CPF; Utilization efficiency; Biosafety
资金
- National Natural Science Foundation of China [21407151]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2015385]
- Key Program of Chinese Academy of Sciences [KSZD-EW-Z-022-05]
- Science and Technology Service Programs of Chinese Academy of Sciences [KFJ-STS-ZDTP-002, KFJ-SW-STS-143]
- Grant of the President Foundation of Hefei Institutes of Physical Science of Chinese Academy of Sciences [YZJJ201502]
In this work, a pH-responsively controlled-release chlorpyrifos (PRCRC) was developed using a nanosystem consisting of chlorpyrifos (CPF), polydopamine (PDA), attapulgite (ATP), and calcium alginate (CA). Therein, CPF was adsorbed in the nanonetwork-structured PDA-modified ATP (PA) to obtain CPF-PA through hydrogen bonds and electrostatic attraction. Subsequently, CPF-PA combined with CA to form porous CPF-PA-CA hydrogel spheres (actually PRCRC) through cross-linking reaction, wherein PA acted as the skeleton. PRCRC spheres tended to collapse in alkaline solution and promoted the release of CPF, thus displayed a good pH-responsively controlled release performance, which was proved by the control efficacy test on grubs. Besides, the system could effectively protect CPF molecules from degradation under ultraviolet light. Importantly, the PA-CA hydrogel possessed a benign biocompatibility on Escherichia coli and foxtail millet, showing a high biosafety. Therefore, this work provides a promising approach to improve the utilization efficiency and prolong duration of pesticide, which might have a huge potential application prospect.
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