Synthesis and Electrorheological Property of BaTiO<sub>3</sub> Coated Fly Ash Floating Bead/PAn Composites

Xi-ping Lei; Yan-mei Lin; Ding Han; Xue-feng Song; Yue Wang; Bing-xin Wang

doi:10.11777/j.issn1000-3304.2016.15313

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Synthesis and Electrorheological Property of BaTiO₃ Coated Fly Ash Floating Bead/PAn Composites

Research Article | 更新时间：2021-03-19

- Synthesis and Electrorheological Property of BaTiO₃ Coated Fly Ash Floating Bead/PAn Composites
- Acta Polymerica Sinica Issue 6, Pages: 805-813(2016)
- 作者机构：
  
  西安建筑科技大学材料与矿资学院功能材料研究所西安 710055
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2016.15313
  CLC：
- Published：2016-6，
  
  Received：26 November 2015，
  
  Revised：29 January 2016，
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Xi-ping Lei, Yan-mei Lin, Ding Han, Xue-feng Song, Yue Wang, Bing-xin Wang. Synthesis and Electrorheological Property of BaTiO₃ Coated Fly Ash Floating Bead/PAn Composites. [J]. Acta Polymerica Sinica (6):805-813(2016)
DOI：

Xi-ping Lei, Yan-mei Lin, Ding Han, Xue-feng Song, Yue Wang, Bing-xin Wang. Synthesis and Electrorheological Property of BaTiO₃ Coated Fly Ash Floating Bead/PAn Composites. [J]. Acta Polymerica Sinica (6):805-813(2016) DOI： 10.11777/j.issn1000-3304.2016.15313.

摘要

首先利用原位化学氧化聚合法将聚苯胺包覆在粉煤灰漂珠表面(FAFB/PAn)

再利用低温溶胶凝胶-水热法制备BaTiO

包覆FAFB/PAn的复合材料(FAFB/PAn/BaTiO

)

形成内核为空心漂珠、外壳依次为导电层、绝缘层的核/壳结构.采用FTIR、XRD、SEM、数字式四探针以及LCR介电谱仪对FAFB/PAn/BaTiO

复合材料的结构与性能进行分析;以FAFB/PAn/BaTiO

为分散相制备的电流变液

对其悬浮性及外加电场下的剪切应力进行测试.FTIR和XRD结果证明了利用本文的实验方法可成功将PAn和BaTiO

引入到FAFB表面.电导率测试结果表明

复合材料电导率为7.8×10

-4

S·cm

-1

相对BaTiO

提高了近2个数量级.在1~2000 kHz交变电场频率测试范围内

FAFB/PAn/BaTiO

具有相对较好的介电性能:当

=1 kHz时

最大为598

随电场频率的增加介电常数逐渐减小

对应的介电损耗tan

最大为1.14

且随电场频率的增加介电损耗逐渐减小

当

=200 kHz时tan

=0.75

后趋于平稳.比较了7天的悬浮稳定性发现

FAFB/PAn稳定性最好

悬浮率可达88%

而包覆BaTiO

后与纯BaTiO

相当

仅为60%.在电场作用下FAFB/PAn/BaTiO

表现出较明显的电流变性能

即当

=4.0 kV/mm时

剪切应力达631 Pa

且具有较好的抗击穿能力.

Abstract

The fly ash floating beads were covered by polyaniline (FAFB/PAn) by using

in situ

polymerization method.Sol gel-hydrothermal method was introduced to prepare FAFB/PAn/BaTiO

composites.FAFB/PAn/BaTiO

composites had core/shell structure with multilayer

which was composed of the core as hollow FAFB and the first shell as conductive layer PAn and the second one as insulating layer BaTiO

.The structure and performance of the composites were analyzed by FTIR

XRD

SEM

four point probe technique and LCR.The suspension and shear stress of electrorheological fluid were tested.The results of FTIR and XRD showed that PAn and BaTiO

could successfully be coated on the surface of FAFB by this method.The results of conductivity showed that the value of FAFB/PAn/BaTiO

was 7.8×10

-4

S·cm

-1

and rose almost by two orders of magnitude in comparison with BaTiO

.It had better dielectric properties in the 1-2000 kHz frequency range.The max value of

reached 598 if

= 1 kHz was provided and with the increase of frequency

the dielectric constant decreased correspondingly.The maximum of tan

was 1.14 at

=1 kHz and its value decreased to 0.75 until 200 kHz.Comparison with the suspension stability of them

FAFB/PAn showed better suspension ratio as 88% than BaTiO

and FAFB/PAn/BaTiO

after 7 days

while the values of the latter two was similar as only 60%.FAFB/PAn/BaTiO

based electrorheological fluid showed a significant ER effect and obvious higher capability of breakdown resistance under electric field.When the applied electric field was 4.0 kV/mm

the shear stress arrived at 631 Pa.

关键词

粉煤灰漂珠BaTiO3聚苯胺电流变性能介电性能

Keywords

Fly ash floating beadBaTiO3PolyanilineElectrorheological propertyDielectric property

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College of Chemistry and Molecular Engineering, Peking University

College of Chemistry and Chemical Engineering, Chongqing University

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University

College of Engineering Sciences, University of Chinese Academy of Sciences

Department of Micro Nano Processing and intelligent Electrical Equipment, Institute of Electrical Engineering, Chinese Academy of Sciences

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Synthesis and Electrorheological Property of BaTiO3 Coated Fly Ash Floating Bead/PAn Composites

DOI：10.11777/j.issn1000-3304.2016.15313

摘要

Abstract

关键词

Keywords

references

Synthesis and Electrorheological Property of BaTiO₃ Coated Fly Ash Floating Bead/PAn Composites