尺寸可控的聚苯胺复合微球的电纺制备与表征

ELECTROSPINNING PREPARATION AND CHARACTERIZATION OF SIZE CONTROLLABLE POLYANILINE COMPOSITE MICOSPHERES

以十二烷基苯磺酸(DBSA)掺杂的导电聚苯胺与聚乙二醇(PEG)及Fe3O4的混合氯仿溶液,采用静电纺丝(spinning technology)方法制备含Fe3O4纳米颗粒的导电聚苯胺(PANI)/PEG/Fe3O4复合微球.SEM结果表明,电纺所得的PANI/PEG/Fe3O4复合微球结构依赖于PEG聚合物浓度、静电纺丝电压和Fe3O4的添加量.随着PEG质量浓度的增加,微球从彼此粘结变化为较为规则的微球结构,并且直径呈增大趋势;当电纺电压逐渐增加时,微球尺寸逐渐减小;而在PANI/PEG溶液中加入不同量的Fe3O4后,电纺产物的形貌几乎没有变化.FTIR结果表明,静电纺丝过程没有改变各组分的性质;XRD分析表明,电纺工艺不影响复合微球中PANI组分的分子结构;磁性测试结果表明,Fe3 O4的添加诱导复合微球呈超顺磁性,其饱和磁强度(Ms)随Fe3 O4的加入量的增加而增加.

Polyaniline（PANI） microspheres containing Fe3O4 nanoparticles are prepared by means of electrospinning technology using a blending chloroform solution of dodecylbenzene sulfonic acid（DBSA） doped polyaniline（PANI） with polyethylene glycol（PEG） and Fe3O4 nanoparticles.SEM images indicate that composite microspheres of PANI/PEG/Fe3O4 are prepared by means of electrospinning technology,and the diameters are in the range of 2~5 μm,which are significantly influenced by the concentration of PEG polymer,the applied voltage and the mass ratio of Fe3O4 in the polymers.With increasing the concentration of PEG,cohesive microspheres turn into regular ones,meanwhile the diameters increase.In comparison,the increasing applied voltage results in gradually reduced diameters of the microspheres.In addition,the microspheres are hardly affected by the addition of various amounts of Fe3O4nanoparticles.It is found that the addition of Fe3O4nanoparticles does not affect the polymeric chain structure of PANI.However,the added Fe3O4nanoparticles contribute superparamagnetic properties to the composite microspheres,especially the saturated magnetization（Ms） increases with the increase of the adding content of Fe3O4 nanoparticles.Furthermore,the conductive ratio of the electrospinning conduct is about 1×10-6 S/cm.