Synthesis, characterizations and kinetics of MOF-5 as herbicide vehicle and its controlled release in PVA/ST biodegradable composite membranes,Zeitschrift für anorganische und allgemeine Chemie

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Synthesis, characterizations and kinetics of MOF-5 as herbicide vehicle and its controlled release in PVA/ST biodegradable composite membranes
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2021-09-06 , DOI: 10.1002/zaac.202100252
Shaoxiang Lee ₁ , Guohui Wang ₁ , Nana Ji ₁ , Meng Zhang ₁ , Dong Wang ₂ , Lishui Sun ₁ , Wenqiao Meng ₁ , Yuqi Zheng ₁ , Yanxin Li ₁ , Yuting Wu ₁

Affiliation

Polyvinyl alcohol/starch based composite membranes containing herbicide-loaded metal-organic-framework (MOF-5) was successfully synthesized by electrostatic spraying technique. Several main parameters affecting the adsorption of MOF-5 were studied, including the initial concentration of the herbicide solution, adsorption time, and temperature. Under optimal conditions, herbicide-loaded MOF-5 was successfully synthesized and the main properties were characterized by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), Thermogravimetric Analysis (TG), and Brunauer-Emmett-Teller (BET), respectively. The results showed that the adsorption capacity of MOF-5 at optimal conditions was 60.12wt%±0.61 % for atrazine. The sustained release effect of the AT@MOF-5/PVA/ST composite membranes was reliable, and the cumulative release rate was about 50 % for 15 h. The release behaviour of AT from AT@MOF-5/PVA/ST composite membranes was first dominated by the mechanism of Fickian diffusion and then by the mechanism of matrix erosion. The main advantages of agricultural herbicide film can be attributed to the eco-friendly, biodegradable, and persistence of herbicide.

中文翻译：

MOF-5作为除草剂载体的合成、表征和动力学及其在PVA/ST可生物降解复合膜中的控释

采用静电喷涂技术成功合成了含有除草剂负载金属有机骨架（MOF-5）的聚乙烯醇/淀粉基复合膜。研究了影响MOF-5吸附的几个主要参数，包括除草剂溶液的初始浓度、吸附时间和温度。在最佳条件下，成功合成了负载除草剂的MOF-5，并通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱仪（FTIR）、热重分析（TG）和Brunauer-Emmett-Teller (BET)，分别。结果表明，MOF-5在最佳条件下对阿特拉津的吸附量为60.12wt%±0.61%。AT@MOF-5/PVA/ST复合膜的缓释效果可靠，15小时累积释放率约为50%。AT@MOF-5/PVA/ST复合膜的AT释放行为首先受Fickian扩散机制支配，然后受基质侵蚀机制支配。农用除草剂薄膜的主要优点可归因于除草剂的环保、可生物降解和持久性。

更新日期：2021-09-06

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