Abstract

The search for highly productive agriculture has considerably increased the use of fertilizers, becoming a worrying source of environmental and health risks. This work reports the preparation and characterization of a controlled phosphorus release system using a multi-layer blend of starch and latex, in different proportions. Infrared spectroscopy and thermogravimetric analysis were used to evaluate the incorporation and interaction of phosphorus with the polymeric matrix. The mechanical properties, and transport properties were evaluated as a function of the addition of latex and mono-ammonium phosphate (MAP) to the starch. The Zero order, Peppas-Sahlin and Korsmeyer-Peppas kinetic models were applied. The results showed that phosphorus is released between 58% to 80% in the analyzed time. The release mechanism depends on the blend composition and the amount of incorporated MAP, indicating that it is possible to adapt the material formulation to meet specific soil needs.

Graphic Abstract

中文翻译：

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多层淀粉-乳胶共混物磷的输送系统设计与应用

摘要

对高产农业的追求大大增加了肥料的使用，成为环境和健康风险的令人担忧的来源。这项工作报告了使用淀粉和乳胶的多层混合物（不同比例）来控制磷释放系统的制备和表征。红外光谱和热重分析法用于评估磷与聚合物基体的结合和相互作用。根据向淀粉中添加胶乳和磷酸一铵（MAP）的函数来评估机械性能和运输性能。使用零级，Peppas-Sahlin和Korsmeyer-Peppas动力学模型。结果表明，在分析时间内磷的释放量为58％至80％。

图形摘要