Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Abstract

Abstract. Polyaniline (PANI)-coated iron oxide (Fe 3 O 4 ) sphere particles were fabricated and applied to a dual stimuliresponsive material under electric and magnetic fields, respectively. Sphere Fe 3 O 4 particles were synthesized by a solvothermal process and protonated after acidification. The aniline monomer tended to surround the surface of the Fe 3 O 4 core due to the electrostatic and hydrogen bond interactions. A core-shell structured product was finally formed by the oxidation polymerization of PANI on the surface of Fe 3 O 4 . The formation of Fe 3 O 4 @PANI particles was examined by scanning electron microscope and transmission electron microscope. The bond between Fe 3 O 4 and PANI was confirmed by Fourier transform-infrared spectroscope and magnetic properties were analyzed by vibration sample magnetometer. A hybrid of a conducting and magnetic particle-based suspension displayed dual stimuli-response under electric and magnetic fields. The suspension exhibited typical electrorheological and magnetorheological behaviors of the shear stress, shear viscosity and dynamic yield stress, as determined using a rotational rheometer. Sedimentation stability was also compared between Fe 3 O 4 and Fe 3 O 4 @PANI suspension.

Fabricating and Tailoring Polyaniline (PANI) Nanofibers with High Aspect Ratio in a Low‐Acid Environment in a Magnetic Field

“…For the Fe 3 O 4 microspheres, the weight loss at 20–300 °C was ascribed to residual water and surfactant PEG4000, which is against particle agglomeration in the formation process of Fe 3 O 4 microspheres . A sharp degradation of the resulting sample at 100–600 °C was mainly assigned to the thermal degradation of PANI, in agreement with the previous result . On the basis of TGA data, the content of PANI in the resulting sample is approximately 44.9 %.…”

Polythiophene with ionophore substituent in the side chain

“…Especially since the Noble Prize was awarded to H. Shirakawa, A. G. MacDiarmid, and A. J. Heeger, these new materials have become one of the most studied class of polymers. Semiconducting polymers are compounds combining the most desirable properties of conventional plastics with the properties of electrically conductive materials . Polymers regarded as synthetic metals or organic semiconductors possess variety of interesting and useful optical, electrical, and chemical properties.…”

“…Semiconducting polymers are compounds combining the most desirable properties of conventional plastics with the properties of electrically conductive materials. [3][4][5] Polymers regarded as synthetic metals or organic semiconductors possess variety of interesting and useful optical, electrical, and chemical properties. In recent decades there has been growing progress in practical application of these materials as important component of electronic devices such as OLED's, solar cells, conductometric sensors, and dry batteries.…”

Barium ferrite/epoxy resin nanocomposite system: Fabrication, dielectric, magnetic and hydration studies

“…The majority of these works refers to the variation of magnetic permeability, dielectric permittivity at GHz, and absorption properties, with the composition and the preparation procedure of ceramic compounds. On the other hand studies concerning the magnetic behaviour of polymer based composites are still scarce [9][10][11][12][13]. Polymers exhibit a number of advantages, which include ease processing and forming, thermomechanical stability, high dielectric breakdown strength and low cost.…”