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首页> 外文会议>Characterization of minerals, metals, and materials 2018 >Evaluation of Urea Encapsulation by Microcapsules of PHB/MMT and PHB/OMMT Nanocomposites
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Evaluation of Urea Encapsulation by Microcapsules of PHB/MMT and PHB/OMMT Nanocomposites

机译：PHB / MMT和PHB / OMMT纳米复合材料微胶囊对尿素包封的评价

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摘要

Urea is the most used nitrogen fertilizer around the world being responsible for many environmental problems. Preparation of microcapsules from biodegradable polymer has been reported as a main system to sustain active substances, finding application in different areas. The objective of this work was to sustain urea in nanocomposite microcapsules of poly(3-hidroxybutyrate) (PHB) reinforced with a smectite Brazilian clay in its natural (MMT) and modified (OMMT) form. PHB/MMT and PHB/OMMT microcapsules were obtained by w/o/w emulsion. Characterization were performed by XRD and optical microscopy. Structural and morphological differences observed by XRD and optical microscopy shown that PHB/OMMT microcapsules are smaller than PHB/MMT microcapsules, with average size diameter ranging ~ 49 μm. Results indicate that PHB/OMMT microcapsules present more defects and fractures than PHB/MMT microcapsules.
机译：尿素是世界上使用最广泛的氮肥，它引起许多环境问题。据报道，由可生物降解的聚合物制备微胶囊是维持活性物质的主要系统，已在不同领域得到应用。这项工作的目的是将尿素保持在天然（MMT）和改性（OMMT）形式的蒙脱石巴西粘土增强的聚（3-羟丁酸）（PHB）纳米复合微囊中。通过w / o / w乳液获得PHB / MMT和PHB / OMMT微胶囊。通过XRD和光学显微镜进行表征。 XRD和光学显微镜观察到的结构和形态差异表明，PHB / OMMT微胶囊比PHB / MMT微胶囊小，平均粒径为〜49μm。结果表明，PHB / OMMT微胶囊比PHB / MMT微胶囊存在更多的缺陷和断裂。

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  • 会议地点 Phoenix(US)
  • 作者

    J. C. Arjona; F. R. Valenzuela-Diaz; H. Wiebeck; S. H. Wang; M. G. Silva-Valenzuela;

  • 作者单位

    Metalurgic and Materials Engineer Department, Polytechnic School of University of Sao Paulo, Avenida Prof. Mello Moraes 2463, Sao Paulo 05508-030, Brazil;

    Metalurgic and Materials Engineer Department, Polytechnic School of University of Sao Paulo, Avenida Prof. Mello Moraes 2463, Sao Paulo 05508-030, Brazil;

    Metalurgic and Materials Engineer Department, Polytechnic School of University of Sao Paulo, Avenida Prof. Mello Moraes 2463, Sao Paulo 05508-030, Brazil;

    Metalurgic and Materials Engineer Department, Polytechnic School of University of Sao Paulo, Avenida Prof. Mello Moraes 2463, Sao Paulo 05508-030, Brazil;

    Metalurgic and Materials Engineer Department, Polytechnic School of University of Sao Paulo, Avenida Prof. Mello Moraes 2463, Sao Paulo 05508-030, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Microencapsulation; Brazilian clay; Urea; PHB;

    机译：微囊化；巴西黏土；尿素PHB;

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