General Method for the Fabrication of Hollow Microcapsules with Adjustable Shell Compositions
General Method for the Fabrication of Hollow Microcapsules with Adjustable Shell Compositions
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DOI：
10.1021/cm0502828
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发表时间：
2005-04
影响因子：
8.6
通讯作者：
N. Ren;Bo Wang;You-Hao Yang;Yahong Zhang;Wuli Yang;Y. Yue;A. Gao;Yi Tang
中科院分区：
文献类型：
--
作者：
N. Ren;Bo Wang;You-Hao Yang;Yahong Zhang;Wuli Yang;Y. Yue;A. Gao;Yi Tang
在本文中，已经提出了一种简单和通用的策略来制备一系列具有从二氧化硅到非二氧化硅（例如，二氧化钛、氧化锆、铂、硫化银、硫化镉、硫化铟和碲化镉）通过简单地碱处理具有或不具有包封的客体物质的阳离子预涂覆的中孔二氧化硅球（MSS）。MSS既作为最终产品形态的球形模板，又作为非二氧化硅纳米颗粒在其3D连接通道中的纳米反应器/储库，而外部预涂覆的阳离子聚合物通过捕获和固定在核心蚀刻期间释放的纳米颗粒，在最终产品中的壳的构建中发挥外网或球形支架的有趣作用。通过对样品在碱处理过程中形貌演变的研究，揭示了壳层的形成机理。如此...
In this paper, a facile and general strategy has been proposed for the preparation of a series of microcapsules with the diverse shell compositions from silica to nonsilica (e.g., titania, zirconia, platinum, silver sulfide, cadmium sulfide, indium sulfide, and cadmium telluride) by simply alkaline treating the cationic polyelectrolyte precoated mesoporous silica spheres (MSSs) with or without the encapsulated guest species. The MSS acts both as the spherical template for the morphology of the final product and as the nanoreactor/reservoir of the nonsilica nanoparticles in their 3D-connected channels, while the cationic polymer precoated outside plays an interesting role of exonet or spherical scaffold for the construction of the shell in the final products through capturing and immobilizing the nanoparticles released during the core etching. The mechanism on the formation of the shell has also been revealed through investigating the morphology evolution of the samples during the alkaline treatment. Such ...