Rectangular‐Shaped Polyaniline Tubes Covered with Nanorods and their Electrorheology

Lee, Bo Mi; Kim, Ji Eun; Fang, F.; Choi, Hyoung Jin; Feller, Jean‐François

doi:10.1002/macp.201100306

Cited by 38 publications

(32 citation statements)

References 78 publications

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“…This short λ indicates fast reformation of the PIn particle chains under an applied electric field, which can be demonstrated by the so‐called on‐off tests shown in Figure . On the other hand, it can be also noted that while no study of the size and shape‐dependent dielectrics properties of PIn is available, the effect of size and shape of the ER particles on their dielectrics characteristics has been reported that a larger particle size and particles with larger aspect ratio give a higher dielectric constant for Na‐titanate nanofiber, barium titanate particle, PANI tube, and PANI‐coated poly(methyl methacrylate) microsphere …”

Section: Resultsmentioning

confidence: 99%

Emulsion‐polymerized polyindole nanoparticles and their electrorheology

Park

Kwon

Choi

2018

J of Applied Polymer Sci

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Polyindole (PIn) nanoparticles were synthesized through an emulsion polymerization technique in this study and then examined as an anhydrous semi‐conducting electro‐responsive material. Their surface morphology and chemical structure were observed with high‐resolution scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. When dispersed in silicone oil, the electrorheological (ER) properties of the PIn particles were examined using a rotational rheometer with both steady shear and oscillatory tests under various applied electric field strengths with direct observation using an optical microscope. Flow curves of shear stress as a function of shear rate were well fitted using the Cho‐Choi‐Jhon model. Dielectric analysis was also performed to examine the permittivity and loss factor in relation to the ER effect. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46384.

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Section: Resultsmentioning

confidence: 99%

Emulsion‐polymerized polyindole nanoparticles and their electrorheology

Park

Kwon

Choi

2018

J of Applied Polymer Sci

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“…ERFs can exhibit drastic changes in their rheological properties, including large enhancements in the apparent viscosity, shear stress, modulus, and yield stress under an alternating‐current/dc electric field 28–30. The polarization of the suspended particles is induced by the application of an electric field, and a chainlike structure can be formed along the electric field direction in a few milliseconds 30–35. Before the preparation of ERFs, the as‐obtained S4 sample was further immersed in an aqueous NH 3 solution for several hours.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of clay/polyaniline nanofiber hybrids

Wang

Yin

Liu

et al. 2012

J of Applied Polymer Sci

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A modified interfacial polymerization was used to prepare polyaniline (PANI) nanohybrids. The influence of the synthetic route, amounts of bentonite, and the surfactant on the structure, morphology, and optical properties of the as-synthesized nanocomposite were investigated. These materials were characterized by field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction, ultraviolet-visible spectroscopy, thermogravimetric analysis, and rheometer. The results show that PANI could be intercalated into the interlayer of the bentonite. The interlayer space increased from 1.25 to 1.486 nm. Then, the hexadecyl trimethyl ammonium bromide was used to modify the surface of bentonite, which was helpful in hybridizing with PANI for its hydrophobic properties. Both the intercalated and coating structure were found in the bentonite/PANI nanohybrid. The TEM and SEM images verified that the surface of the bentonite plate was coated by PANI nanofibers. In addition, for the study of the electroresponsive behavior, the composite was dispersed in silicone oil, and its electrorheological characteristics were examined via both an optical microscope and a rheometer equipped with a high-voltage power source.

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“…Among them polyaniline (PANI) [8,9] and polypyrrole [10] are of special interest. Polyaniline, as a material for electrorheology, has been reported in many scientific papers due to its easy and inexpensive synthesis [5,8,[11][12][13][14][15][16][17][18]. Moreover, aniline-like oligomers with tuneable conductivities prepared by different reaction conditions or reaction substances have been introduced [19][20][21].…”

Section: Introductionmentioning

confidence: 99%