Revealing formation process of microcapsules during in situ polymerization via confocal laser scanning fluorescence microscopy
Revealing formation process of microcapsules during in situ polymerization via confocal laser scanning fluorescence microscopy
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通过共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
DOI：
10.1007/s00396-011-2494-9
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发表时间：
2011-08
影响因子：
2.4
通讯作者：
Guo, Bao-Hua
中科院分区：
文献类型：
--
作者：
Wan, Xian;Xu, Jun;Xie, Xu-Ming;Guo, Bao-Hua
采用原位聚合法制备了石蜡核/聚苯乙烯壳微胶囊，利用共聚焦激光扫描荧光显微镜（CLSM）和扫描电镜（SEM）对微胶囊的形成过程进行了监测。利用CLSM重建三维图像，可以看到微胶囊在聚合过程中的早期形态转变过程：首先在乳化液滴的赤道上出现分离斑块，然后聚集形成带状，最后变成碗状结构。扫描电镜观察清楚地显示，微胶囊的后续形态变成了一个带孔的壳，最后得到了一个完整的填充壳。利用傅里叶变换红外光谱研究了苯乙烯的转化过程。微胶囊的形成过程由化学反应诱导分离和物理迁移两个过程组成。进一步对核壳粒子的中间态进行了力学分析。该结果与CLSM和SEM观察结果一致，为基于颗粒旋转的微胶囊形成机制提供了有效证据。
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 microcapsule-forming process on the basis of particles rotation.
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影响因子：
2.4
作者：
Deveci, Senem Sirin;Basal, Guldemet
通讯作者：
Basal, Guldemet
影响因子：
--
作者：
H. Kawaguchi;Y. Isono;Sakiko Tsuji
通讯作者：
H. Kawaguchi;Y. Isono;Sakiko Tsuji
DOI：
10.1016/j.colsurfa.2006.11.051
发表时间：
2007-05-15
影响因子：
5.2
作者：
Su, Jun-Feng;Wang, Li-Xin;Ren, Li
通讯作者：
Ren, Li
DOI：
10.1021/la0470838
发表时间：
2005-05
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
P. Dowding;R. Atkin;B. Vincent;P. Bouillot
通讯作者：
P. Dowding;R. Atkin;B. Vincent;P. Bouillot
DOI：
10.1002/pola.21964
发表时间：
2007-06
期刊：
Journal of Polymer Science Part A
影响因子：
--
作者：
V. Herrera;R. Pirri;J. Asua;J. R. Leiza
通讯作者：
V. Herrera;R. Pirri;J. Asua;J. R. Leiza