Biomimetic synthesis of raspberry-like hybrid polymer-silica core-shell nanoparticles by templating colloidal particles with hairy polyamine shell

被引：56

作者：

Pi, Mengwei ^{[1
]}

Yang, Tingting ^{[1
]}

Yuan, Jianjun ^{[1
]}

Fujii, Syuji ^{[2
]}

Kakigi, Yuichi ^{[2
]}

Nakamura, Yoshinobu ^{[2
]}

Cheng, Shiyuan ^{[1
]}

机构：

[1] Hubei Univ, Key Lab Green Preparat & Applicat Funct Mat, Minist Educ, Fac Mat Sci & Engn, Wuhan 430062, Peoples R China

[2] Osaka Inst Technol, Dept Appl Chem, Asahi Ku, Osaka 5358585, Japan

来源：

COLLOIDS AND SURFACES B-BIOINTERFACES | 2010年 / 78卷 / 02期

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

Biosilicification; Core-shell nanoparticles; Biomimetic synthesis; NANOCOMPOSITE PARTICLES; DRUG-DELIVERY; HOLLOW SILICA; FABRICATION; MICELLES; COATINGS; GLASS;

D O I：

10.1016/j.colsurfb.2010.02.031

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The nanoparticles composed of polystyrene core and poly[2-(diethylamino)ethyl methacrylate] (PDEA) hairy shell were used as colloidal templates for in situ silica mineralization, allowing the well-controlled synthesis of hybrid silica core-shell nanoparticles with raspberry-like morphology and hollow silica nanoparticles by subsequent calcination. Silica deposition was performed by simply stirring a mixture of the polymeric core-shell particles in isopropanol, tetramethyl orthosilicate (TMOS) and water at 25 degrees C for 2.5 h. No experimental evidence was found for nontemplated silica formation, which indicated that silica deposition occurred exclusively in the PDEA shell and formed PDEA-silica hybrid shell. The resulting hybrid silica core-shell particles were characterized by transmission electron microscopy (TEM), thermogravimetry, aqueous electrophoresis, and X-ray photoelectron spectroscopy. TEM studies indicated that the hybrid particles have well-defined core-shell structure with raspberry morphology after silica deposition. We found that the surface nanostructure of hybrid nanoparticles and the composition distribution of PDEA-silica hybrid shell could be well controlled by adjusting the silicification conditions. These new hybrid core-shell nanoparticles and hollow silica nanoparticles would have potential applications for high-performance coatings, encapsulation and delivery of active organic molecules. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：193 / 199

页数：7

共 45 条

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