Preparation of core–shell structured metal–organic framework@PANI nanocomposite and its electrorheological properties

Wen, Qingkun; Ma, Lili; Wang, Chengwei; Wang, Baoxiang; Han, Rongjiang; Hao, Chuncheng; Chen, Kezheng

doi:10.1039/c9ra02268f

Cited by 24 publications

(8 citation statements)

References 52 publications

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“…The power-law relations between the three different yield stresses and electric field strength (E) (Equation (3)) (m = 1.5) obey the conduction model for ER fluids. Note that the slope close to 1.5 has been also observed for ER fluids based on not only GO composite [ 33 , 34 ] but also other composite particles [ 35 ]. τ y ∝ E m …”

Section: Resultssupporting

confidence: 55%

Synthesis and Electrorheological Response of Graphene Oxide/Polydiphenylamine Microsheet Composite Particles

et al. 2020

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Conducting graphene oxide/polydiphenylamine (GO/PDPA) microsheet nanocomposite particles were fabricated via in-situ oxidative polymerization using diphenylamine in the presence of GO. The morphological structures and dimensions of the fabricated GO/PDPA composites were evaluated using transmission electron microscopy and scanning electron microscopy. Electrorheological (ER) responses and creep behaviors of an ER fluid consisting of the GO/PDPA composites when suspended in silicone oil were evaluated using a rotational rheometer under input electric field. Three different types of yield stresses were examined along with dielectric analysis, demonstrating their actively tunable ER behaviors.

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Section: Resultssupporting

confidence: 55%

Synthesis and Electrorheological Response of Graphene Oxide/Polydiphenylamine Microsheet Composite Particles

et al. 2020

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“…), conducting polymers, poly(ionic liquid) (PIL), etc. have been studied for the development of ER materials [13,14,15,16,17,18,19]. Compared to extrinsically polarizable materials that need to absorb water to activate ER effects, materials that are intrinsically polarizable or conducting are favored because of their better prospects in industry.…”

Section: Introductionmentioning

confidence: 99%

Electrorheological Characteristics of Poly(diphenylamine)/magnetite Composite-Based Suspension

Dong

Choi

2019

Materials

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Electro-responsive poly(diphenylamine)(PDPA)/Fe3O4 composite particles were prepared by the synthesis of PDPA particles using a chemical oxidative polymerization technique followed by loading nano-sized Fe3O4 particles onto PDPA via a chemical co-precipitation process. The morphological image of the PDPA/Fe3O4 particles was characterized by scanning electron microscope and transmission electron microscope. The crystalline structure was scrutinized by X-ray diffraction. The rheological characteristics of the suspension composed of PDPA/Fe3O4 particles suspended in silicone oil were investigated by a rotation rheometer, demonstrating standard electrorheological (ER) characteristics with a dramatic increase in shear stress and dynamic moduli under the application of an electrical field strength. The shear stress curves under an electrical field could be described using the Bingham model and the yield stress showed a power-law relationship with the electric field strength with an exponent of 1.5, following the conduction model. Furthermore, the frequency-dependent dielectric behaviors of the PDPA/Fe3O4 ER suspension was tested using an inductance (L)-capacitance (C)-resistance (R) (LCR) meter. The dielectric properties were well described using the Cole–Cole equation and were consistent with the results of the ER experiments.

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“…[1][2][3][4][5][6][7][8] In recent years, the focus of the investigation has been on PANI composites consists of different materials like CNT, [9] metal oxides, [10] nitrates, [11] sulfides, [12] and so forth to produce new materials with exciting physical and chemical properties. The exploration of composites of PANI has received great interest from various researchers, industries across the globe [10,11,13] especially for supercapacitor applications. [14,15] The inorganic fillers are expected to modify drastically the electrical, optical, and dielectric properties of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, electrical, and dielectric properties of novel polyaniline/strontium di‐nitrate composites

Ashwini

Pattar

Sreekanth³

et al. 2021

Polymer Composites

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Polyaniline (PANI) and polyaniline/strontium di-nitrate [Sr(NO 3 ) 2 ] composites were synthesized by in-situ chemical oxidative polymerization. The composites with different weight percentages of Sr(NO 3 ) 2 were synthesized for the study of the charge transport mechanism. Interaction between Sr(NO 3 ) 2 and the PANI was confirmed from the observed peak shift to a lower wavelength in the FTIR spectra. DC conductivity of composites decreased with an increase in the concentrations of Sr(NO 3 ) 2 . The exponent values, 0.64 < s < 0.75, calculated from Jonscher universal power-law using AC conductivity forecasts the hopping conduction mechanism. The complex impedance studies showed two semicircles in the Nyquist plot and simulated to an equivalent circuit by constant-phase element (CPE). The relaxation time for pristine PANI was 2.28 μs, whereas a higher relaxation time of 18.5 μs was observed with 40 wt% Sr(NO 3 ) 2 , doped composite.The values of dielectric constant, and dielectric loss decreased with increasing frequency and increasing Sr(NO 3 ) 2 wt%. Therefore, the results obtained for Sr(NO 3 ) 2 doped PANI composites are of scientific and technological interest.

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Preparation of core–shell structured metal–organic framework@PANI nanocomposite and its electrorheological properties

Abstract: Core–shell-structured MIL-125@PANI nanocomposites were synthesized, which can exhibit smart electrorheological behavior under an external electric field.

Cited by 24 publications

References 52 publications

Synthesis and Electrorheological Response of Graphene Oxide/Polydiphenylamine Microsheet Composite Particles

Synthesis and Electrorheological Response of Graphene Oxide/Polydiphenylamine Microsheet Composite Particles

Electrorheological Characteristics of Poly(diphenylamine)/magnetite Composite-Based Suspension

Synthesis, electrical, and dielectric properties of novel polyaniline/strontium di‐nitrate composites

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