Synthesis and characterization of magnetic Fe3O4-silica-poly(γ-benzyl-L-glutamate) composite microspheres

被引：24

作者：

Liu, Dong ^{[1
]}

Li, Yi ^{[1
]}

Deng, Jianping ^{[1
]}

Yang, Wantai ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Coll Mat Sci & Engn, Beijing 100029, Peoples R China

来源：

REACTIVE & FUNCTIONAL POLYMERS | 2011年 / 71卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Magnetic property; Composite microspheres; Fe3O4; Poly(gamma-benzyl-L-glutamate); HELIX-COIL TRANSITION; POLY-L-LYSINE; POLYPEPTIDE; IMMOBILIZATION; NANOPARTICLES; DIAGNOSIS;

D O I：

10.1016/j.reactfunctpolym.2011.07.009

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This article reports a novel type of composite microspheres showing magnetic properties. The composite microspheres consist of Fe3O4, silica, and poly(gamma-benzyl-L-glutamate) (PBLG). For preparing such composite microspheres, Fe3O4 nanoparticles were fabricated by the solvothermal method and then coated with a silica shell by tetraethoxysilane. Subsequently, amino groups were introduced on the above Fe3O4-silica spheres by using 3-aminopropyltriethoxysilane. Finally, the obtained spheres were used as initiator for polymerizing gamma-benzyl-L-glutamate N-carboxyanhydride (BLG-NCA), providing the anticipated magnetic composite microspheres. Such microspheres were characterized by FT-IR, TEM, large-angle powder XRD, and vibrating sample magnetometer. FT-IR spectra demonstrated that the PBLG chains adopted alpha-helical conformations. The magnetic composite microspheres showed a high saturation magnetization of 34.1 emu/g and the expected rapid magnetic responsivity. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：1040 / 1044

页数：5

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