Fabrication of Polymer Microspheres Using Titania as a Photocatalyst and Pickering Stabilizer

被引：61

作者：

Song, Xiaomei ^{[1
]}

Zhao, Yongliang ^{[1
]}

Wang, Haitao ^{[1
]}

Do, Qiangguo ^{[1
]}

机构：

[1] Fudan Univ, Dept Macromol Sci, Minist Educ, Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

来源：

LANGMUIR | 2009年 / 25卷 / 08期

基金：

中国国家自然科学基金;

关键词：

RESPONSIVE PARTICULATE EMULSIFIERS; METHACRYLIC-ACID; LATEX-PARTICLES; CROSS-LINKING; TIO2; PHOTOPOLYMERIZATION; NANOCOMPOSITE; NANOPARTICLES; ADSORPTION; EMULSIONS;

D O I：

10.1021/la8039237

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Facile photocatalytic emulsion polymerization was developed to fabricate polystyrene (PS) microsphere; using a transparent anatase titania hydrosol both as a photocatalyst and stabilizer. Under the appropriate conditions, PS microspheres with a well-defined particle size distribution can be easily produced from 100 to 830 nm. The effects of cross-linking agent ethylene glycol dimethacrylate (EGDMA) and coupling agent acrylic acid (AA) on the particle size and the size distribution of PS microspheres were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and other characterization means. It is proven that EGDMA and AA play importance roles in the morphology of microspheres. In addition, AA bonds a large number of titania nanoparticles on the surface of PS microspheres because its carboxyl group forms inorganic armored polymer microspheres. This interfacial interaction between titania nanoparticles and PS chains causes the elevated glass-transition temperature of microspheres.

引用

页码：4443 / 4449

页数：7

共 53 条

[1] Photocatalysis and promoted photocatalysis during photocrosslinking of multifunctional acrylates in composite membranes immobilizing titanium dioxide [J].