PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT

HE Ping; CUI Longlan; QIANG Weili; XU Hong; GU Hongchen

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PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT

Research Article | 更新时间：2021-03-19

- PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT
- Acta Polymerica Sinica Issue 8, Pages: 731-736(2007)
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- Published：20 August 2007，
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HE Ping, CUI Longlan, QIANG Weili, XU Hong, GU Hongchen. PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT. [J]. Acta Polymerica Sinica (8):731-736(2007)
DOI：

HE Ping, CUI Longlan, QIANG Weili, XU Hong, GU Hongchen. PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT. [J]. Acta Polymerica Sinica (8):731-736(2007) DOI：

摘要

在表面由十一烯酸和油酸共同修饰的Fe3O4磁流体存在下

以苯乙烯(St) 和丙烯酸(AA)为共聚单体

用细乳液聚合法

制备了单分散

高Fe3O4含量

且表面带有羧基的超顺磁性高分子复合微球.采用透射电镜(TEM)

热重分析(TGA)

物性测量系统(PPMS)

Zeta电位以及红外光谱等手段对磁性复合微球的各项性能进行表征.结果表明

Fe3O4粒子的表面改性是影响复合微球 Fe3O4含量及形貌的关键因素.在优化的实验条件下

可以制得Fe3O4含量高达77 wt%

平均粒径为137.9 nm

表面羧基密度0.0894 mmol/g

比饱和磁化强度为44.7 emu/g的单分散超顺磁性高分子复合微球.

Abstract

Monodisperse carboxylated superparamagnetic polymer composite microspheres with high magnetite content were prepared by miniemulsion copolymerzation

in which acrylic acid and styrene were used as polymeric monomers

and Fe3O4 microparticles were costabilized by undecylenic acid /oleic acid.Extensive characterizations by transmission electron microscopy (TEM)

Zeta-sizer

thermogravimetric analysis (TGA)

fourier transform infrared spectrometer (FTIR) and physical property meaturement system (PPMS) showed that the surface modification of Fe3O4 microparticles played an important role in controlling the magnetite content and the morphology of the composite microspheres.Under optimized experimental conditions

the superparamagnetic polymer composite microspheres with diameter of 137.9 nm

high magnetite content (77 wt%) and 0.0894 mmol carboxyl groups/g microspheres were successfully produced.

关键词

细乳液超顺磁性复合微球羧基表面改性

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Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

Zhong Ke San Huan Research

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