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Facile one-pot emulsion/sol-gel method for preparing wrinkled silica microspheres
Particuology ( IF 3.5 ) Pub Date : 2020-11-16 , DOI: 10.1016/j.partic.2020.10.004
Yuning Hu , Dongxia Hao , Fangling Gong , Yuanyuan Gao , Xingran Yan , Guanghui Ma

The present manuscript describes a facile and versatile method for preparing uniform wrinkled silica microspheres with diameters of tens of microns. The method comprises a one-pot emulsion/sol-gel method using silica precursors of organosilane and tetraethoxysilane. By controlling the sol-to-gel transition of the silica precursors, a series of silica microspheres based on uniform emulsion droplets was synthesized by membrane emulsification. The silica microspheres had a variety of surface morphologies ranging from smooth, maze-like wrinkles to polygon-like ravines. It was possible to alter the surface morphologies of the microspheres by controlling the amount of organosilane in the dispersed phase and the amount of ammonia catalyst in the continuous phase of the emulsion. The grooves on the wrinkled microspheres were able to trap polymer nanoparticles of matching size, thereby demonstrating the potential usefulness of the microspheres in separation science and drug delivery.



中文翻译:

一种方便的一锅式乳液/溶胶-凝胶法制备皱纹二氧化硅微球

本手稿描述了一种方便且通用的方法,用于制备直径为数十微米的均匀起皱的二氧化硅微球。该方法包括使用有机硅烷和四乙氧基硅烷的二氧化硅前体的一锅法乳液/溶胶-凝胶法。通过控制二氧化硅前体的溶胶-凝胶转变,通过膜乳化合成了一系列基于均匀乳液滴的二氧化硅微球。二氧化硅微球具有多种表面形态,从光滑的迷宫般的皱纹到多边形的沟壑。通过控制分散相中有机硅烷的量和乳液连续相中氨催化剂的量,可以改变微球的表面形态。

更新日期:2020-11-16
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