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首页> 外文期刊>Journal of environmental science and health >Controlled release of thiram fungicide from starch-based hydrogels
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Controlled release of thiram fungicide from starch-based hydrogels

机译:从淀粉基水凝胶中有控制性地释放噻喃类杀菌剂

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In order to make the judicious use of thiram fungicide and to exploit the potential of agri-polymers, we have developed the starch-poly(acrylamide) and starch-poly(acrylic acid) based agrichemical delivery system (hydrogels) for its controlled and sustained release. Polymeric networks have been prepared by using N,N'-methylenebisacrylamide (N,N-MBAAm) as crosslinker and ammonium per-sulfate (APS) as initiator and characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and swelling studies. Release dynamics of thiram fungicide from polymeric matrices has been studied for the evaluation of the diffusion mechanism and diffusion coefficients. It has been established that Non-Fickian diffusion mechanism has occurred for the release of thiram from these polymeric matrices. Furthermore, the initial rate of diffusion of thiram from these polymeric matrices is more as compared to the late stages of diffusion, which is analogous to the trends obtained for the diffusion of water molecules from these polymer matrices.
机译:为了明智地使用thiram杀真菌剂并开发农业聚合物的潜力,我们开发了基于淀粉-聚丙烯酰胺和淀粉-聚丙烯酸的农药输送系统(水凝胶),以对其进行控制和维持释放。通过使用N,N'-亚甲基双丙烯酰胺(N,N-MBAAm)作为交联剂和过硫酸铵(APS)作为引发剂制备聚合物网络,并通过傅里叶变换红外光谱(FTIR),热重分析(TGA)和溶胀进行表征学习。为了评估扩散机理和扩散系数,已经研究了从聚合物基体中释放杀菌剂的特性。已经确定已经发生了非菲克扩散机制,以从这些聚合物基体中释放噻喃。此外,与从扩散后期到扩散相比,从这些聚合物基体扩散的锡拉姆的初始速率更高,这类似于从这些聚合物基体扩散水分子所获得的趋势。

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