一种制备二氧化钛微胶囊的自模板法。

A self-templated approach to TiO2 microcapsules.

作者信息

Hu Yongxing, Ge Jianping, Sun Yugang, Zhang Tierui, Yin Yadong

机构信息

Department of Chemistry, University of California, Riverside, California 92521, USA.

出版信息

Nano Lett. 2007 Jun;7(6):1832-6. doi: 10.1021/nl0708157. Epub 2007 May 11.

DOI:10.1021/nl0708157

PMID:17497825

Abstract

A self-templated approach has been developed for the synthesis of TiO2 microcapsules with tunable size and wall thickness by heating sol-gel derived TiO2 microspheres with poly(acrylic acid) (PAA) in a diethylene glycol (DEG) solution. PAA plays a crucial role in the formation of microcapsules by crosslinking the surface TiO2 nanoparticles and preventing them from dissolution by DEG. Hollow microcapsules form when DEG molecules penetrate the outer layer and remove the core materials by forming soluble titanium glycolate.

摘要

通过在二甘醇（DEG）溶液中加热溶胶-凝胶法制备的TiO₂微球与聚丙烯酸（PAA），开发了一种自模板法来合成尺寸和壁厚可调的TiO₂微胶囊。PAA通过交联表面TiO₂纳米颗粒并防止它们被DEG溶解，在微胶囊的形成中起着关键作用。当DEG分子穿透外层并通过形成可溶性乙醇钛酸盐去除核心材料时，中空微胶囊就形成了。