基于铁的金属有机框架及其聚合物复合材料,用于可持续地提供除草剂
Parimal C Bhomick1,2,3,4, Evdokiya H Ivanovska5, Lila A M Mahmoud6
1Bristol Composites Institute, Queen's Building, University of Bristol, University Walk, Bristol BS8 1TR, U.K.
ACS omega
|March 17, 2025
概括
基于铁的金属有机框架 (Fe-MOFs) 在可持续农业中显示出对受控除草剂输送的前景. 与MIL-101 (Fe) 相比,NH2-MIL-101 (Fe) 复合材料的除草剂释放速度更慢,更受控制.
科学领域:
- 材料科学 材料科学 材料科学
- 农业科学 农业科学
- 纳米技术纳米技术
背景情况:
- 对可持续农业和粮食安全而言,控制农业化学品的输送至关重要.
- 多孔金属有机框架 (MOF),特别是铁基MOF (Fe-MOF),在农业应用中具有低毒性和生物相容性.
- 可生物降解的聚合物复合材料提高了农业化学品的处理和输送.
研究的目的:
- 研究使用两种基于铁的MOF,MIL-101 (Fe) 和NH2-MIL-101 (Fe),以及它们的可生物降解聚烯酸 (PCL) 复合物来控制除草剂的输送.
- 评估两种常见除草剂的负载能力和释放动力学,即2,4-二二酸 (2,4-D) 和2-甲基-4-二酸 (MCPA).
- 为了比较基于MIL-101 ((Fe) 和NH2-MIL-101 ((Fe) 的精密农业化学交付系统的性能.
主要方法:
- 在合成后将2,4-D和MCPA加载到MIL-101 ((Fe) 和NH2-MIL-101 ((Fe)).
- 将含有除草剂的Fe-MOF纳入可生物降解的聚烯酸 (PCL) 基质中,以形成复合膜.
- 在9天内使用紫外线可见光谱分析除草剂释放概况.
- 计算研究以调查除草剂-MOF相互作用.
主要成果:
- 与MIL-101 (分别为18.06%和21.51%) 相比,NH2-MIL-101 (Fe) 对2,4-D (26.61%) 和MCPA (23.32%) 的负载能力更高.
- 两种MOF在除草剂加载期间都显示出一些降解.
- 与MIL-101 (Fe) 和其复合物相比,NH2-MIL-101 (Fe) 和其PCL复合物在9天的时间内表现出明显较慢和更受控制的除草剂释放动力学.
- 计算结果支持实验结果,表明除草剂和NH2-MIL-101之间更强的相互作用.
结论:
- 由于其更高的负载能力和持续释放特征,NH2-MIL-101 (Fe) 是控制除草剂输送系统的优秀候选者.
- Fe-MOF/PCL复合材料为开发有效和环保的农业化学物质输送系统提供了一个可行的策略.
- 对Fe-MOF的稳定性和长期性能进行进一步的研究是必要的.
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