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首页> 外文期刊>Clean technologies and environmental policy >Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release
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Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release

机译：用有机粘膜进行控制释放的混合物中氮肥的封装

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摘要

To increase the effectiveness of fertilizers, new controlled release nitrogen fertilizers have been developed from a mixture of urea and natural smectitic clays and organoclays with different surfactants (ionic and nonionic) encapsulated in an insoluble, biodegradable polymer film. Smectitic clays were classified according to their chemical, physical and mineralogical aspects. Mixtures of urea and natural/organoclays were pressed, and the specimens were dipped into a polymeric solution of poly-e-caprolactone and acetone (solvent). The resulting controlled release fertilizers were analyzed by infrared spectroscopy and by scanning electron microscopy. The release of urea was evaluated by kinetic dissolution test in aqueous medium as determined by analysis on a UV-visible spectrophotometer. The results have shown that organoclays, especially those with nonionic surfactant coated with a PCL film, favored kinetic and gradual delay in the release of urea. This meets the standards established by the European Committee for Standardization, favoring, therefore, important agro-industrial advances at both national and international levels, securing sustainability in the technological sector.
机译：为了提高肥料的有效性，新的控制释放氮肥已经从尿素和天然椎体粘土和有机粘土的混合物中开发，其具有包封在不溶性的可生物降解的聚合物膜中的不同表面活性剂（离子和非离子）。根据其化学，物理和矿物学方面进行宫粘土。压制尿素和天然/有机纤维粘土的混合物，并将标本浸入聚 - 己内酯和丙酮（溶剂）的聚合物溶液中。通过红外光谱和通过扫描电子显微镜分析所得的控释肥料。通过在紫外可见分光光度计测定的水性介质中通过在水性介质中进行动力学溶解试验评估尿素的释放。结果表明，有机粘土，尤其是涂有PCL薄膜的非离子表面活性剂的有机粘土，有利于尿素释放的动力学和逐渐延迟。这符合欧洲标准化委员会建立的标准，因此，国家和国际一级的重要农业工业进步，确保了技术部门的可持续性。

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  • 来源
    《Clean technologies and environmental policy》 |2020年第10期|2163-2176|共14页
  • 作者

    I. A. Silva; D. S. Silva; M. U. Sousa; R. R. Menezes; H. S. Ferreira; G. A. Neves;

  • 作者单位

    Department of Materials Engineering Academic Unit of Materials Engineering Federal University of Campina Grande Av. Aprigio Veloso 882 Bodocongo Campina Grande Paraiba 58429-900 Brazil;

    Department of Materials Engineering Academic Unit of Materials Engineering Federal University of Campina Grande Av. Aprigio Veloso 882 Bodocongo Campina Grande Paraiba 58429-900 Brazil;

    Department of Materials Engineering Academic Unit of Materials Engineering Federal University of Campina Grande Av. Aprigio Veloso 882 Bodocongo Campina Grande Paraiba 58429-900 Brazil;

    Department of Materials Engineering Academic Unit of Materials Engineering Federal University of Campina Grande Av. Aprigio Veloso 882 Bodocongo Campina Grande Paraiba 58429-900 Brazil;

    Departament of Materials Engineering Federal University of Paraiba Cidade Universitaria Joao Pessoa Paraiba 58059-900 Brazil;

    Department of Materials Engineering Academic Unit of Materials Engineering Federal University of Campina Grande Av. Aprigio Veloso 882 Bodocongo Campina Grande Paraiba 58429-900 Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Smectitic clays; Surfactants; Fertilizers; Controlled release; Encapsulation;

    机译：瞳孔粘土;表面活性剂;肥料;控释;封装;

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