摘要作为一种新型功能材料，磁性聚合物微球微球兼具磁性纳米颗粒和高分子材料的特性，既可以对外加磁场产生磁响应，又可对其表面进行修饰，使其具备多种官能团，因此，近年来磁性聚合物微球被应用于生化分离、医药工程等领域。本文通过静电喷射技术和溶剂热法，制备出了表面涂覆四氧化三铁(Fe304)纳米颗粒的聚丙烯腈（PAN）磁性微球。并利用光学显微镜、扫面电子显微镜（SEM）、X射线衍射（XRD）等技术对制备的Fe3O4/PAN磁性微球的表面形貌、组成做了分析。结果表明，通过控制PAN溶液的浓度、静电喷射时的电压强度以及溶剂热反应时间，可以有效的调控Fe3O4/PAN磁性微球的表面形貌、形状和磁响应强度。在PAN溶液的质量体积分数为3％和6％时，分别可得到规整球形和中空圆盘形微球，且两种微球表面都具有褶皱型坑洞；溶剂热反应时间越短得到的磁性微球的磁响应强度越低。48033

毕业论文关键词：聚合物；磁性微球；静电喷射；溶剂热   

毕业设计说明书外文摘要  

Title  Preparation and characterization of a novel magnetic microspheres                   

Abstract

As a new kind of functional material, magnetic polymer microspheres have both the characteristics of magnetic nanoparticles and polymer materials, not only can response the external magnetic field, but the surface can be modified to have a variety of functional groups. Therefore, in recent years, magnetic polymer microspheres have been used in the field of biochemical separation, medical engineering and so on. This paper reports preparation of the coated ferroferric oxide nanoparticles of polyacrylonitrile  magnetic microspheres by electrostatic spraying technology and solvothermal method. The surface morphology and composition of the prepared Fe3O4/PAN magnetic microspheres were analyzed by optical microscopy, scanning electron microscopy  and X-ray diffraction. The results  show  that the surface morphology, shape and magnetic response of Fe3O4/PAN  magnetic  microspheres  can  be effectively controlled by controlling the concentration of PAN solution, the voltage intensity and the solvent thermal reaction time. In the pan solution quality volume fraction is 3% and 6%， regular spherical and hollow disc-shaped microspheres can be obtained respectively，and two kinds of microspheres surface has fold type hole，and the shorter the solvent thermal reaction time is, the lower the magnetic response intensity of the magnetic microspheres is.

Keywords：Polymer ；Magnetic microsphere ；Electrospraying ；Solvent thermal method

 目   次

1   引言  1

1.1 聚合物磁性微球的结构与组成  1

    1.1.1  高分子材料的组成  1

    1.1.2  磁性材料的组成  1

1.2 磁性聚合物微球的制备  2

    1.2.1  物理沉积法     2

    1.2.2  化学聚合法     2

       1.2.2.1  乳液聚合法  2

       1.2.2.2  悬浮聚合法  2

    1.2.3  静电喷射法   2

       1.2.3.1  静电喷射法简介3

       1.2.3.2  静电喷射法制备聚合物微球3

    1.2.4  溶剂热法制备Fe3O4纳米颗粒 4

1.3 聚合物磁性微球的应用 4

    1.3.1  生化分离领域的应用  4

    1.3.2  生物医学工程领域的应用 4

       1.3.2.1  靶向药物的制备 4 Fe3O4/PAN磁性微球的制备与表征:http://www.751com.cn/cailiao/lunwen_50370.html