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On the formation of uniform alginate-silica microcomposites with ordered hierarchical structures

机译:均匀的层状结构藻酸盐-二氧化硅微复合材料的形成

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摘要

The hierarchical ordering at micro- and nano-scales in hybrid composites of alginate and silica nanopar-ticles was observed when uniform microparticles were formed in a single step via a micro-fluidic jet spray drying. A polymer-mediated 'bricks and mortar' strategy initially aligned silica nanoparticles into nano-clusters in the dispersion with sizes depending on the ratio of polymer to silica. Evaporation induced self-assembly during spray drying then formed uniform microparticles with shells enriched with silica nanoparticles, enclosing arrays of close-packed spherical aggregates of these nano-clusters. The final structures of particles were determined by the drying temperature and the ratio of alginate to silica, indicating that this approach could be used to fabricate diverse structural motifs. The combination of polymer-mediated self-assembly with a moderate temperature spray drying could be a versatile route to synthesize thermal sensitive, ordered biomaterials for food and pharmaceutical-related applications.
机译:当通过微流体喷射喷雾干燥在单个步骤中形成均匀的微粒时,观察到藻酸盐和二氧化硅纳米微粒的杂化复合物中的微米和纳米级的等级顺序。聚合物介导的“砖和灰浆”策略最初将二氧化硅纳米颗粒在分散体中排列成纳米簇,其大小取决于聚合物与二氧化硅的比例。喷雾干燥过程中蒸发引起的自组装,然后形成均匀的微粒,其壳中富含二氧化硅纳米颗粒,从而封闭了这些纳米团簇的紧密堆积球形聚集体的阵列。颗粒的最终结构由干燥温度和藻酸盐与二氧化硅的比例确定,表明该方法可用于制造各种结构图案。聚合物介导的自组装与中温喷雾干燥的结合可能是合成热敏,有序生物材料用于食品和制药相关应用的通用途径。

著录项

  • 来源
    《Journal of food engineering》 |2013年第2期|299-307|共9页
  • 作者单位

    Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia;

    Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia;

    Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia;

    CSIRO Materials Science and Engineering, Bayview Avenue, Clayton, Victoria 3168, Australia;

    Monash Centre for Electron Microscopy, Monash University, Clayton, Victoria 3800, Australia;

    Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia ,Department of Chemical and Biochemical Engineering, Xiamen University, Fujian Province 361005, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Alginate-silica composites; Silica nanoparticles; Self-assembly; Hierarchical ordering; Micro-fluidic jet spray drying;

    机译:海藻酸盐-二氧化硅复合材料;二氧化硅纳米粒子;自组装;分层排序;微流喷射干燥;

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