Synthesis of Magnetic Spherical Polyelectrolyte Brushes

被引：59

作者：

Chen, Kaimin ^{[1
]}

Zhu, Yan ^{[1
]}

Zhang, Yifei ^{[1
]}

Li, Li ^{[1
]}

Lu, Yan ^{[2
]}

Guo, Xuhong ^{[1
]}

机构：

[1] E China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, German Soft Matter & Funct Mat, D-14109 Berlin, Germany

来源：

MACROMOLECULES | 2011年 / 44卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MINIEMULSION POLYMERIZATION; SURFACE MODIFICATION; NANOPARTICLES; PARTICLES; NANOSPHERES; COMPOSITE; STABILITY; PROTEIN; FE3O4; IMMOBILIZATION;

D O I：

10.1021/ma102337c

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Magnetic spherical polyelectrolyte brushes (MSPB) with embedded magnetite nanoparticles in core were successfully synthesized and characterized by dynamic light scattering (DLS), a scanning electron microscope (SEM), a high resolution transmission electron microscope (HRTEM), thermal gravimetric analysis (TGA), X-ray diffraction (XRD), and a vibrating sample magnetometer (VSM). At first, oleic acid modified magnetite nanoparticles (MNP) were synthesized by the coprecipitation method and then embedded into the polystyrene core by miniemulsion polymerization to obtain magnetic polystyrene latices (MPL). Finally, magnetic spherical poly(acrylic acid) (PAA) brushes were synthesized by photoemulsion polymerization. Effects of MNP and acrylic acid (AA) content on the brush structure were studied in detail. The obtained MSPB are narrowly dispersed, pH sensitive, superparamagnetic, and redispersible after aggregating by external magnetic field. Magnetic control is thus introduced into nanosized spherical polyelectrolyte brushes to achieve the recovery and controllable delivery. This approach opens a new way for the recoverable and cost-effective applications of spherical polyelectrolyte brushes.

引用

页码：632 / 639

页数：8

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