高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (4): 772.doi: 10.7503/cjcu20141000

• 高分子化学 • 上一篇    下一篇

微米聚苯胺/Fe3O4空心球的制备及吸波性能

李涛, 张龙, 陈颖, 郭亚军, 杜雪岩()   

  1. 兰州理工大学材料科学与工程学院, 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050
  • 收稿日期:2014-11-12 出版日期:2015-04-10 发布日期:2015-03-18
  • 作者简介:联系人简介: 杜雪岩, 男, 博士, 教授, 主要从事磁性纳米复合材料的制备、 表征及性能研究. E-mail: duxy@lut.cn
  • 基金资助:
    国家自然科学基金(批准号: 51363015)资助

Preparation and Electromagnetic Wave-absorbing Properties of Micro-polyaniline/Fe3O4 Hollow Spheres

LI Tao, ZHANG Long, CHEN Ying, GUO Yajun, DU Xueyan*()   

  1. Lanzhou University of Technology,State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,School of Materials and Science, Lanzhou 730050, China
  • Received:2014-11-12 Online:2015-04-10 Published:2015-03-18
  • Contact: DU Xueyan E-mail:duxy@lut.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51363015)

摘要:

采用界面聚合和Pickering乳液聚合相结合的方法, 以甲苯为软模板, 磁性Fe3O4纳米颗粒为稳定剂, 十二烷基苯磺酸钠(SDBS)为乳化剂, 过硫酸铵(APS)为氧化剂, 盐酸(HCl)为掺杂剂, 制备了掺杂态聚苯胺/Fe3O4(D-PANI/Fe3O4)空心球. 作为比较, 在不掺杂盐酸的条件下, 制备了本征态聚苯胺/Fe3O4(PANI/Fe3O4)空心球. 用透射电子显微镜(TEM)、 扫描电子显微镜(SEM)、 X射线衍射(XRD)仪、 傅里叶变换红外光谱(FTIR)仪、 热重分析(TG)仪、 振动样品磁强(VSM)计及恒压四探针测试仪对复合材料的形貌、 结构、 组成和电磁性能进行了表征. 结果表明, D-PANI/Fe3O4空心球的直径约为2.8 μm, 电导率和饱和磁化强度(Ms)分别为2.75×10-2 S/cm和54.26 A·m2/kg. 用矢量网络分析(VNA)仪对D-PANI/Fe3O4空心球和PANI/Fe3O4空心球吸波性能进行分析, 结果表明, D-PANI/Fe3O4空心球在12.64 GHz处的最小反射率为-43.3 dB, 对应的匹配厚度为2 mm, 其吸波性能明显优于PANI/Fe3O4空心球.

关键词: 界面聚合, 聚苯胺, 磁性纳米颗粒, 复合材料, 吸波性能

Abstract:

Doped polyaniline/Fe3O4(D-PANI/Fe3O4) with hollow spheres were prepared by the combination of interfacial polymerization and Pickering emulsion polymerization method with toluene as soft template, Fe3O4 nanoparticles as cosurfactant, sodium dodecyl benzene sulfonate(SDBS) as emulsifier, ammonium persulfate(APS) as oxidant, hydrochloric acid(HCl) as the doping agent. And as a comparison, the polyaniline/Fe3O4(PANI/Fe3O4) with hollow spheres were prepared without acid doping. The morphology, structure, integrant, magnetic and electrical properties of the composite material were characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), thermogravimetric(TG), vibration sample magnetism(VSM) and the four-probe method, respectively. The results indicate that the D-PANI/Fe3O4 with hollow spheres structures were prepared successfully. The diameter of D-PANI/Fe3O4 hollow spheres was about 2.8 μm, the conducti-vity and saturation magnetization(Ms) of D-PANI/Fe3O4 hollow spheres were 2.75×10-2 S/cm and 54.26A·m2/kg, respectively.The quality of Fe3O4 nanoparticles accounted for about 28% of D-PANI/Fe3O4 hollow spheres. Electromagnetic properties and wave absorption performance of D-PANI/Fe3O4 hollow spheres and PANI/Fe3O4 hollow spheres were analyzed by vector network analyzer(VNA). The results showed that the best absorbing property and minimum reflection loss(RL) of D-PANI/Fe3O4 composites were -43.3 dB at 12.64 GHz with the matching thickness of 2 mm, and the wave absorption performance was superior to PANI/Fe3O4 composites.

Key words: Interfacial polymerization, Polyaniline, Magnetic nanoparticle, Composite material, Microwave absorption

中图分类号: 

TrendMD: