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首页> 外文期刊>Journal of Polymers and the Environment >PHB and Montmorillonite Clay Composites as KNO_3 and NPK Support for a Controlled Release
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PHB and Montmorillonite Clay Composites as KNO_3 and NPK Support for a Controlled Release

机译：PHB和蒙脱土粘土复合材料作为KNO_3和NPK支持控释

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摘要

In order to improve nutrient uptake by plants and at the same time decrease losses by leaching, polymeric compounds based on biodegradable poly(3-hydroxybutyrate) (PHB) and montmorillonite clay (MMt) were melt processed with KNO3 and NPK fertilizers (Fert). We present a comprehensive analysis of releasing profile of the potassium (K+), nitrogen (NH4+ and NO3-) and phosphorous (PO43-) from PHB/MMt/fertilizer at 90/0/10, 50/0/50, 80/10/10, 40/10/50, 25/25/50 formulation. The amount and type of the fertilizer and the presence of clay delineated the release of the cations and anions from the matrix. Cations released faster than anions through MMt composites due to cations-MMt interactions and its diffusion through MMt phase. The nutrients delivery from composites was lower than pure fertilizer. Composites formulations with smaller amount of PHB and MMt (25wt%) were enough to encapsulate the fertilizer and delay the ions releasing. Further, the simple method of preparation also attains the sustainability of the whole process.
机译：为了提高植物对养分的吸收并同时通过淋洗减少损失，将可生物降解的聚（3-羟基丁酸酯）（PHB）和蒙脱土（MMt）为基础的高分子化合物与KNO3和NPK肥料熔融加工（Fert）。我们对PHB / MMt /肥料在90/0 / 10、50 / 0 / 50、80 / 10时钾（K +），氮（NH4 +和NO3-）和磷（PO43-）的释放曲线进行了全面分析/ 10、40 / 10 / 50、25 / 25/50配方。肥料的数量和类型以及粘土的存在描述了基质中阳离子和阴离子的释放。由于阳离子与MMt的相互作用及其在MMt相中的扩散，阳离子通过MMt复合物的释放速度要快于阴离子。复合材料的养分输送低于纯肥。 PHB和MMt（25wt％）较少的复合配方足以包封肥料并延迟离子释放。此外，简单的制备方法还实现了整个过程的可持续性。

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