| Electrorheological Properties of Suspensions of PAn-PEO-PAn Triblock Copolymer Particles |
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| 作者姓名： | MA Huiru GUAN Jianguo YUAN Runzhang |
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| 作者单位： | State Key Lab of Advanced Technology for Materials Synthesis and Processmg,Wuhan University of Technology ,Wuhan 430070,China |
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| 基金项目： | Funded by the National Natural Science Foundation of China（No.29904005） |
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| 摘 要： | The PAn-PEO-PAn triblock copolymer with the PEG chain length of 400 was synthesized by chemical oxidation copolymerization of aniline and α,ω-bis（p-aminophenyl）poly（ethylene glycol）and characterized by FT-IR and TEM.The experimental results show that the copolymer particles are of μtypical core-shell structure after the self-assembly process in water.Its conductivity is much lower than that of the pure PAn.The suspension containing 20 vol% PAn-PEO-PAn tiblock copolymer in silicone oil exhibits.a typical electrorheological （ER） effect in DC electric field.while it shows a lower leakage current density than that of the pure PAn-based ER fluids.Therefore,the PEO shell hinders the electric hop among PANI chains and decreases the current density of ER fluids in an external electric field.at the same time the interface polarity improves the ER effects.
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| 关 键 词： | 悬浮液 电流变学 聚苯胺 聚环氧乙烷 三嵌段共聚物颗粒 |
| 收稿时间： | 2005-04-25 |
| 修稿时间： | 2005-09-10 |
Electrorheological properties of suspensions of PAn-PEO-PAn triblock copolymer particles |
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| MA Huiru GUAN Jianguo YUAN Runzhang.Electrorheological Properties of Suspensions of PAn-PEO-PAn Triblock Copolymer Particles[J].Journal of Wuhan University of Technology. Materials Science Edition,2005,20(4):43-45. |
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| Authors: | MA Huiru Ph D Guan Jianguo Yuan Runzhang |
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| Affiliation: | (1) State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070 Wuhan, China |
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| Abstract: | The PAn-PEO-PAn triblock copolymer with the PEG chain length of 400 was synthesized by chemical oxidation copolymerization
of aniline and α, ω-bis(p-aminophenyl) poly(ethylene glycol) and characterized by FT-IR and TEM. The experimental results
show that the copolymer particles are of a typical core-shell structure after the self-assembly process in water. Its conductivity
is much lower than that of the pure PAn. The suspension containing 20 vol% PAn-PEO-PAn triblock copolymer in silicone oil
exhibits a typical electrorheological (ER) effect in DC electric field, while it shows a lower leakage current density than
that of the pure PAn-based ER fluids. Therefore, the PEO shell hinders the electric hop among PANI chains and decreases the
current density of ER fluids in an external electric field, at the same time the interface polarity imprones the ER effects.
Funded by the National Natural Science Foundation of China (No. 29904005) |
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| Keywords: | PAn-PEO-PAn triblock copolymer core-shell particles ER properties |
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