Fabrication and characterization of TiO2-SiO2 composite nanoparticles and polyurethane/(TiO2-SiO2) nanocomposite films

被引：29

作者：

Chen, Li ^{[1
]}

Shen, Haixia ^{[1
]}

Lu, Zhen ^{[1
]}

Feng, Cang ^{[1
]}

Chen, Su ^{[1
]}

Wang, Yanru ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing 210009, Peoples R China

来源：

COLLOID AND POLYMER SCIENCE | 2007年 / 285卷 / 13期

关键词：

TiO2-SiO2 composite nanoparticles; Ti-O-Si bond; polyurethane/(TiO2-SiO2) nanocomposite hybrids;

D O I：

10.1007/s00396-007-1720-y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TiO2-SiO2 composite nanoparticles were prepared by a sol-gel process. To obtain the assembly of TiO2-SiO2 composite nanoparticles, different molar ratios of Ti/Si were investigated. Polyurethane (PU)/(TiO2-SiO2) hybrid films were synthesized using the "grafting from" technique by incorporation of modified TiO2-SiO2 composite nanoparticles building blocks into PU matrix. Firstly, 3-aminopropyltriethysilane was employed to encapsulate TiO2-SiO2 composite nanoparticles' surface. Secondly, the PU shell was tethered to the TiO2-SiO2 core surface via surface functionalized reaction. The particle size of TiO2-SiO2 composite sol was performed on dynamic light scattering, and the microstructure was characterized by X-ray diffraction and Fourier transform infrared. Thermogravimetric analysis and transmission electron microscopy (TEM) employed to study the hybrid films. The average particle size of the TiO2-SiO2 composite particles is about 38 nm when the molar ratio of Ti/Si reaches to1:1. The TEM image indicates that TiO2-SiO2 composite nanoparticles are well dispersed in the PU matrix.

引用

页码：1515 / 1520

页数：6

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