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Supramolecular complex formation of β-cyclodextrin polymer with substituted salicylic acid or 3-hydroxy-2-naphthoic acid and their electrorheological behaviors

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Abstract

According to the chemical design, electrorheological properties of supramolecular complex from β-cyclodextrin polymer (β -CDP) were discussed. Six supramolecular complexes of β-cyclodextrin polymer with substituted salicylic acid and 3-hydroxy-2-naphthoic acid were synthesized by the solid-phase self-assembly method, and their component and structure were characterized by NMR, FT-IR, UV-vis and the fluorescence analysis. Then the electrorheological properties of their suspensions in silicone oil were investigated under DC electric fields. It was found that the yield stresses of these supramolecular complex ER fluids were 7.3–9.8 kPa at 4 kV/mm in DC electric field, which were enhanced by 34%–72% compared with that of pure β-CDP. Among them, that of β-CDP/3-hydroxy-2-naphthoic acid ER fluid was the highest. It was also found that the ER effect of supramolecular complexes can be controlled by changing different guests. When the substituted group is at phenyl ring, ER behavior can be slightly adjusted by the different substituted groups, their number as well as their position at phenyl ring. This can be proved by the measurement of dielectric properties.

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Authors and Affiliations

  1. Institute of Electrorheological Technology141#, Department of Applied Physics, Northwestern Polytechnical University, 710072, Xi’an, China

    Gao Ziwei & Zhao Xiaopeng

  2. Department of Chemistry, School of Chemistry and Material Science, Shaanxi Normal University, 710062, Xi’an, China

    Gao Ziwei, Sun Ping & Si Gang

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  1. Gao Ziwei
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  2. Zhao Xiaopeng
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  3. Sun Ping
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  4. Si Gang
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Correspondence to Zhao Xiaopeng.

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Gao, Z., Zhao, X., Sun, P. et al. Supramolecular complex formation of β-cyclodextrin polymer with substituted salicylic acid or 3-hydroxy-2-naphthoic acid and their electrorheological behaviors. Sc. China Ser. B-Chem. 47, 340–348 (2004). https://doi.org/10.1360/03yb0249

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  • DOI: https://doi.org/10.1360/03yb0249

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