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首页> 外文期刊>RSC Advances >Hybrid mesoporous microspheres from aqueous droplets containing a silica nanoparticle-polymer network in a W/O suspension
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Hybrid mesoporous microspheres from aqueous droplets containing a silica nanoparticle-polymer network in a W/O suspension

机译：来自含有硅纳米粒子 - 聚合物网络的含水液滴中的杂交介孔微球，其在W / O悬浮液中

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An aqueous dispersion of a reactive copolymer with trimethoxysilyl side chains and silica nanoparticles (SiPs) was added to silicone oil containing 3-aminopropyltrimethoxysilane (APS). The mixture was vigorously stirred for several hours. Consequently, spherical water droplets were formed through the condensation reactions of the copolymer and SiPs as well as APS, which was relocated from the oil phase to the aqueous phase. During the reaction, water was consumed by hydrolysis of the methoxysilyl groups of APS and the droplets gradually solidified. The particulate formation was continuously investigated through optical microscopy. The obtained dried particles were characterized thoroughly using scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), elemental analysis, Si-29 crosspolarization/magic angle spinning nuclear magnetic resonance (Si-29 CP/MAS NMR) spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The results reveal that these microspheres possess a good compressive strength as APS was successfully incorporated to form Si-O-Si linkages with the copolymer and SiPs to connect the components inside the droplets. The amino functional groups in APS also act to avoid coagulation of the prepared microspheres. Furthermore, it was found that mesoporous silica microspheres embedded with nano-sized silica can also be prepared by calcination of the hybrid microspheres without any fracture. The FE-SEM image of the inner surface of the charred particles shows a uniform distribution of the SiPs and thus confirmed the appropriate morphology of the microspheres.
机译：向含3-氨基丙基三甲氧基硅烷（AP）的硅油中加入反应性共聚物与三甲氧基甲硅烷基侧链和二氧化硅纳米颗粒（啜饮）的水分散体。将混合物剧烈搅拌几个小时。因此，通过共聚物和啜饮的缩合反应以及APS从油相迁移到水相中，形成球形水滴。在反应过程中，通过水解APS的甲氧基甲硅烷基团和液滴消耗水，逐渐凝固。通过光学显微镜连续研究颗粒状形成。使用扫描电子显微镜（SEM），现场发射扫描电子显微镜（Fe-SEM），元素分析，Si-29横向化/魔法角旋转核磁共振（Si-29cp / Mas NMR）光谱法，将所得干燥的颗粒彻底表征。和Brunauer-Emmett-Teller（BET）分析。结果表明，这些微球具有良好的抗压强度，因为APS成功地掺入以形成与共聚物和啜饮的Si-O-Si键合，以将部件连接在液滴内。 APS中的氨基官能团也行动，以避免凝结制备的微球。此外，发现嵌入含有纳米大小二氧化硅的中孔二氧化硅微球也可以通过杂交微球的煅烧而没有任何裂缝来制备。烧焦粒子内表面的Fe-SEM图像显示啜饮的均匀分布，从而证实了微球的适当形态。

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  • 来源
    《RSC Advances》 |2016年第49期|共7页
  • 作者

    Sultana S.; Alam Md. A.; Takafuji M.; Ihara H.;

  • 作者单位

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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