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Controlled release from hydroxyapatite nanoparticles incorporated into biodegradable, soluble host matrixes

机译:从羟基磷灰石纳米颗粒中的控制释放掺入可生物降解的,可溶性宿主基质中

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摘要

We report in this paper a strategy to prepare nanocomposite fertilizers based on the dispersion of hydroxyapatite (Hap) into urea and thermoplastic starch at nanoscale, where Hap was assumed as a model for poorly soluble phosphate phases, such as phosphate rocks. Our experiments revealed the role of particle agglomeration on the effective phosphate release, showing that Hap dispersion within two water-soluble matrices (urea and thermoplastic starch/urea) is an effective strategy to increase Hap solubility. Aspects such as matrix solubility, morphology and Hap loading were detailed studied. Also, these structures showed an interesting slow-release of urea, i.e., the materials were at the same time a system for faster release of poorly soluble phosphate phases and slow release of very soluble nitrogen source (urea). Our results support the development of a new class of smart fertilizers, with release properties tailored by nanostructure.
机译:我们在本文中报告了基于羟基磷灰石(HAP)分散在纳米级尿素和热塑性淀粉的基础上制备纳米复合肥料的策略,其中HAP被认为是磷酸盐差异差的型号,例如磷酸盐岩。 我们的实验揭示了颗粒聚集在有效磷酸盐释放上的作用,表明两个水溶性基质(尿素和热塑性淀粉/脲)中的HAP分散是增加HAP溶解度的有效策略。 详细研究了基质溶解度,形态和HAP载荷等方面。 而且,这些结构表明,尿素的有趣缓慢释放,即,材料同时进行的系统,用于更快地释放磷酸盐相的较快释放,并且非常可溶的氮源(尿素)缓慢释放。 我们的结果支持开发新类智能肥料,由纳米结构裁定释放性能。

著录项

  • 来源
    《RSC Advances》 |2015年第126期|共8页
  • 作者单位

    Univ Fed Sao Carlos Dept Chem BR-13565905 Sao Carlos SP Brazil;

    Univ Fed Sao Carlos Dept Chem BR-13565905 Sao Carlos SP Brazil;

    Embrapa Instrumentat BR-13560970 Sao Carlos SP Brazil;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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