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首页> 外文期刊>Advanced Functional Materials >Generation of Monodisperse Inorganic-Organic Janus Microspheres in a Microfluidic Device
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Generation of Monodisperse Inorganic-Organic Janus Microspheres in a Microfluidic Device

机译：微流控设备中单分散无机有机Janus微球的生成。

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摘要

This study presents a simple synthetic approach for the in situ preparation of monodisperse hybrid Janus microspheres (HJM) having organic and inorganic parts in a PDMS-based microfluidic device. Based on the mechanism of shear-force-driven break-off, merged droplets of two photocurable oligomer solutions having distinctive properties are generated into an immiscible continuous phase. Functionalized perfluoropolyether (PFPE) as the organic phase and hydrolytic allylhydridopolycarbosilane (AHPCS) as the inorganic phase are used for the generation in aqueous medium of HJM with well-defined morphology and high monodispersity (average diameter of 162μm and a 3.5% coefficient of variation). The size and shape of the H)M is controlled by varying the flow rate of the disperse and continuous phases. The HJM have two distinctive regions: a hydrophobic hemisphere (PFPE) having a smooth surface and a relatively hydrophilic region (AHPCS) with a rough, porous surface. In addition, pyrolysis and subsequent oxidation of these HJM convert them into SiC-based ceramic hemispheres through the removal of the organic portion and etching off the silica shell. The selective incorporation of magnetic nanoparticles into the inorganic part shows the feasibility of the forced assembly of HJM in an applied magnetic field.
机译：这项研究提出了一种简单的合成方法，用于在基于PDMS的微流体装置中原位制备具有有机和无机部分的单分散杂化Janus微球（HJM）。基于剪切力驱动的断裂机理，具有独特性质的两种可光固化的低聚物溶液的合并液滴会生成不混溶的连续相。功能化的全氟聚醚（PFPE）作为有机相，而水解烯丙基氢化聚碳硅烷（AHPCS）作为无机相被用于在HJM的水介质中生成形态清晰且具有高单分散性（平均直径为162μm，变异系数为3.5％）的HJM。 。通过改变分散相和连续相的流速来控制H）M的大小和形状。 HJM具有两个独特区域：具有光滑表面的疏水半球（PFPE）和具有粗糙多孔表面的相对亲水区域（AHPCS）。此外，这些HJM的热解和随后的氧化通过除去有机部分并蚀刻掉二氧化硅壳，将它们转化为SiC基陶瓷半球。将磁性纳米颗粒选择性地掺入无机部分显示了在施加的磁场中强制组装HJM的可行性。

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  • 来源
    《Advanced Functional Materials》 |2009年第10期|1656-1662|共7页
  • 作者

    Naveen Prasad; Jayakumar Perumal; Chang-Hyung Choi; Chang-Soo Lee; Dong-Pyo Kim;

  • 作者单位

    School of Applied Chemistry and Biological Engineering Chungnam National University Daejeon 305-764 (Korea);

    School of Applied Chemistry and Biological Engineering Chungnam National University Daejeon 305-764 (Korea);

    School of Applied Chemistry and Biological Engineering Chungnam National University Daejeon 305-764 (Korea);

    School of Applied Chemistry and Biological Engineering Chungnam National University Daejeon 305-764 (Korea);

    School of Applied Chemistry and Biological Engineering Chungnam National University Daejeon 305-764 (Korea);

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