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首页> 外文期刊>Colloid and polymer science >Revealing formation process of microcapsules during in situ polymerization via confocal laser scanning fluorescence microscopy
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Revealing formation process of microcapsules during in situ polymerization via confocal laser scanning fluorescence microscopy

机译：共聚焦激光扫描荧光显微镜揭示原位聚合过程中微胶囊的形成过程

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摘要

Paraffin core/polystyrene shell microcapsules were prepared by in situ polymerization, the formation process of the microcapsules was monitored using confocal laser scanning fluorescence microscope (CLSM) and scanning electron microscopy (SEM). Three-dimensional images were reconstructed with CLSM, which presented the early stage morphology transformation process of the microcapsules along with polymerization as described below: firstly, the separated patch appeared on the equator of the emulsified droplets, next congregated to form a belt, and then changed into a bowl-like structure. SEM observation clearly revealed that the subsequent morphologies of the microcapsules turned into a shell with a hole, and finally, a complete filled shell was achieved. The conversion of styrene was studied by Fourier transform infrared spectroscopy. The formation process of microcapsules was proved to be formed by the two processes: chemical reaction-induced separation and physical migration. Furthermore the mechanics analysis was conducted on the intermediate states of core/shell particles. The results were consistent with the CLSM and SEM observation, which supply effective evidence for the mechanism of the micro-capsule-forming process on the basis of particles rotation.
机译：通过原位聚合制备石蜡核/聚苯乙烯壳微胶囊，使用共聚焦激光扫描荧光显微镜（CLSM）和扫描电子显微镜（SEM）监测微胶囊的形成过程。用CLSM重建三维​​图像，该图像显示了微胶囊的早期形态转变过程以及聚合过程，如下所述：首先，分离的斑块出现在乳化液滴的赤道上，然后聚集形成带，然后变成碗状的结构扫描电镜观察清楚地表明，随后的微胶囊形态变成了带有孔的壳，最后，获得了完整的填充壳。通过傅里叶变换红外光谱研究苯乙烯的转化。证明了微胶囊的形成过程是由两个过程形成的：化学反应诱导的分离和物理迁移。此外，对核/壳颗粒的中间状态进行了力学分析。结果与CLSM和SEM观察结果一致，这为基于颗粒旋转的微胶囊形成过程的机理提供了有效的证据。

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