scholarly journals Nanoparticles Functionalized by Conducting Polymers and Their Electrorheological and Magnetorheological Applications

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 204
Author(s):  
Yu Zhen Dong ◽  
Kisuk Choi ◽  
Seung Hyuk Kwon ◽  
Jae-Do Nam ◽  
Hyoung Jin Choi
Keyword(s):  
Titanium Dioxide ◽  
Thermal Properties ◽  
Conducting Polymers ◽  
Conducting Polymer ◽  
Magnetic Particles ◽  
Core Shell ◽  
Coated Nanoparticles ◽  
Mr Fluids ◽  
Many Core ◽  
Mr Characteristics

Conducting polymer-coated nanoparticles used in electrorheological (ER) and magnetorheological (MR) fluids are reviewed along with their fabrication methods, morphologies, thermal properties, sedimentation stabilities, dielectric properties, and ER and MR characteristics under applied electric or magnetic fields. After functionalization of the conducting polymers, the nanoparticles exhibited properties suitable for use as ER materials, and materials in which magnetic particles are used as a core could also be applied as MR materials. The conducting polymers covered in this study included polyaniline and its derivatives, poly(3,4-ethylenedioxythiophene), poly(3-octylthiophene), polypyrrole, and poly(diphenylamine). The modified nanoparticles included polystyrene, poly(methyl methacrylate), silica, titanium dioxide, maghemite, magnetite, and nanoclay. This article reviews many core-shell structured conducting polymer-coated nanoparticles used in ER and MR fluids and is expected to contribute to the understanding and development of ER and MR materials.

PREPARATION AND MAGNETORHEOLOGICAL CHARACTERIZATION OF CI/PVB CORE/SHELL PARTICLE SUSPENDED MR FLUIDS

2007 ◽  
Vol 21 (28n29) ◽  
pp. 4996-5002 ◽  
Author(s):  
J. L. YOU ◽  
B. J. PARK ◽  
H. J. CHOI ◽  
S. B. CHOI ◽  
M. S. JHON
Keyword(s):  
Magnetic Particles ◽  
Mineral Oil ◽  
Core Shell ◽  
Shell Microstructure ◽  
Flow Properties ◽  
Mr Fluids ◽  
Coating Layers ◽  
Plate Geometry ◽  
Vinyl Butyral

Hybrid magnetic particles of carbonyl iron ( CI ) /poly(vinyl butyral) ( PVB ) with core/shell microstructure ( CI - PVB ) were prepared in order to enhance the dispersion stability of the magnetorheological (MR) fluids. Since the composite particles of CI - PVB have a lower density than that of the pristine CI particles, they are regarded to improve the sedimentation problem of magnetic particles in the MR fluid when the particles are dispersed in a mineral oil and to make easy redispersion after caking. The PVB coating layers were found to play an important role in the steric repulsion between the relatively large CI particles. Morphology and composition of the CI - PVB particles were observed via SEM and TGA, respectively. Flow properties of both CI and CI - PVB based MR fluids were examined via a rotational rheometer in parallel plate geometry equipped with a magnetic field supplier.

scholarly journals Preparation of silver-titanium dioxide core-shell (Ag@TiO2) nanoparticles: Effect of Ti-Ag mole ratio

2012 ◽  
Vol 32 ◽  
pp. 649-655 ◽  
Author(s):  
S. Angkaew ◽  
P. Limsuwan
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
Core Shell

Titanium Dioxide−Polymer Core–Shell Particles Dispersions as Electronic Inks for Electrophoretic Displays

2008 ◽  
Vol 20 (4) ◽  
pp. 1292-1298 ◽  
Author(s):  
M. P. L. Werts ◽  
M. Badila ◽  
C. Brochon ◽  
A. Hébraud ◽  
G. Hadziioannou
Keyword(s):  
Titanium Dioxide ◽  
Core Shell ◽  
Shell Particles

A Brief Review on Thermal Behaviour of PANI as Additive in Heat Transfer Fluid

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
A.G.N. Sofiah ◽  
◽  
M. Samykano ◽  
S. Shahabuddin ◽  
K. Kadirgama ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Conducting Polymers ◽  
Volume Fraction ◽  
Corrosion Property ◽  
Environmental Stability ◽  
Heat Transfer Fluid ◽  
Thermal Engineering ◽  
Engineering System ◽  
Heat Transfer Fluids

Since a decade ago, investigation on nanofluids has grown significantly owing to its enhanced thermal properties compared to conventional heat transfer fluids. This engineered nanofluid has been widely used in the thermal engineering system to improve their energy consumption by improving the thermal efficiency of the system. The addition of nano-size particles as additives dispersed in the base fluids proved to significantly either improve or diminish the behaviour of the base fluids. The behaviour of the base fluid highly depends on the properties of the additives material, such as morphology, size, and volume fraction. Among the variety of nanoparticles studied, the conducting polymers have been subject of high interest due to its high environmental stability, good electrical conductivity, antimicrobial, anti-corrosion property and significantly cheap compared to other nanoparticles. As such, the main objective of the present review is to provide an overview of the work performed on thermal properties performance of conducting polymers based nanofluids.

Synthesis and Characterization of Core/Shell Titanium Dioxide Nanoparticle/Polyacrylamide Nanocomposite

2020 ◽  
pp. 422-425
Author(s):  
Erfan Rezvani Ghomi ◽  
Saied Nouri Khorasani ◽  
Mohammad Dinari ◽  
Shahla Ataei ◽  
Rasoul Esmaeely Neisiany
Keyword(s):  
Titanium Dioxide ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Titanium Dioxide Nanoparticle

Dynamic calculations of the core/shell structured Ising-type endohedral fullerenes: The effect of core and core/shell interaction

2017 ◽  
Vol 31 (33) ◽  
pp. 1750307 ◽  
Author(s):  
Ersin Kantar
Keyword(s):  
Magnetic Properties ◽  
Magnetic Particles ◽  
Stochastic Dynamics ◽  
Mean Field Theory ◽  
Mean Field ◽  
Core Shell ◽  
Core Particle ◽  
Factors Affecting ◽  
The Core ◽  
First Order Phase

In this study, we examine by comparing the dynamic magnetic and hysteretic properties of Ising-type endohedral fullerene (EF) with various dopant magnetic particles confined within a spherical cage. The model of EF X@C[Formula: see text] with X = spin-1/2, spin-1 and spin-3/2 is proposed to study the effect of the nature of core particle on the magnetic properties. The results were obtained by mean-field theory as well as Glauber-type stochastic dynamics, and focused on the response of thermal and hysteretic behaviors of systems. The system exhibits second- and first-order phase transitions. In three different core cases, the system also exhibits type-II superconductivity behavior with a dynamic hysteresis curves of the core. All results display magnetic properties of the EF which strongly depend on the nature of core particle. Moreover, core particle and core/shell (C–S) interaction are proposed as the basic factors affecting the magnetic properties of EF system.

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