http://staff.ulsu.ru/moliver/ref/polymers/pott11.pdf

Graphene-based polymer nanocomposites

Graphene, a one-atom layer of graphite, possesses a unique two-dimensional structure and excellent mechanical, thermal, and electrical properties. Thus, it has been regarded as an important component for making various functional composite materials. Graphene can be prepared through physical, chemical and electrochemical approaches. Among them, chemical methods were tested to be effective for producing chemically converted graphene (CCG) from various precursors (such as graphite, carbon nanotubes, and polymers) in large scale and at low costs. Therefore, CCG is more suitable for synthesizing high-performance graphene based composites. In this progress report, we review the recent advancements in the studies of the composites of CCG and small molecules, polymers, inorganic nanoparticles or other carbon nanomaterials. The methodology for preparing CCG and its composites has been summarized. The applications of CCG-based functional composite materials are also discussed.

Functional Composite Materials Based on Chemically Converted Graphene

Magnetorheological (MR) materials are a kind of smart materials whose mechanical properties can be altered in a controlled fashion by an external magnetic field. They traditionally include fluids, elastomers and foams. In this review paper we revisit the most outstanding advances on the rheological performance of MR fluids. Special emphasis is paid to the understanding of their yielding, flow and viscoelastic behaviour under shearing flows.

Magnetorheological fluids: a review

2.2. Interface Trapping Effects 211 3. High-k Dielectric Materials for OFETs 212 3.1. Inorganic Dielectrics 212 3.1.1. Aluminum Oxide 213 3.1.2. Tantalum Oxide 215 3.1.3. Titanium Dioxide 216 3.1.4. Hafnium Dioxide 217 3.1.5. Zirconium Dioxide 218 3.1.6. Cerium Dioxide 218 3.2. Organic Dielectrics 218 3.2.1. Polymer Dielectrics 218 3.2.2. Self-Assembled Monoand Multilayers 225 3.3. Hybrid Dielectrics 227 3.3.1. Polymeric-Nanoparticle Composites 227 3.3.2. Inorganic-Organic Bilayers 232 3.3.3. Hybrid Solid Polymer Electrolytes 235 4. Summary 235 5. Acknowledgments 236 6. References 236

High-k organic, inorganic, and hybrid dielectrics for low-voltage organic field-effect transistors.

Lithium–sulfur batteries have attracted much attention in recent years due to their high theoretical capacity of 1672 mAh g–1 and low cost However, a rapid capacity fade is normally observed, attributed mainly to polysulfide dissolution and volume expansion Although many strategies have been reported to prolong the cyclability, the high cost and complex preparation processes still hinder their practical application Here, we report the synthesis of a polyaniline–sulfur yolk–shell nanocomposite through a heating vulcanization of a polyaniline–sulfur core–shell structure We observed that this heating treatment was much more effective than chemical leaching to prepare uniform yolk–shell structures Compared with its sulfur–polyaniline core–shell counterparts, the yolk–shell nanostructures delivered much improved cyclability owing to the presence of internal void space inside the polymer shell to accommodate the volume expansion of sulfur during lithiation The yolk–shell material exhibited a stable capaci

Yolk–Shell Structure of Polyaniline-Coated Sulfur for Lithium–Sulfur Batteries

As one of the most important field-responsive intelligent and smart soft matter materials, magnetorheological (MR) fluids, consisting of magneto-responsive magnetizable particles suspended in non-magnetic fluids, have drawn a lot of attentions in both academia and industry as their physical and rheological characteristics can be controlled with external magnetic field strength. In this highlight, preparation methods and MR properties of various magnetic composites with soft magnetic particles and polymers are reviewed. In addition, some industrial applications, such as a MR dampers and a MR polishing, are briefly summarized.

Magnetorheology: materials and application

Colloidal graphene oxide/polyaniline nanocomposite and its electrorheology

We synthesized core/shell structured monodisperse semi-conducting polystyrene/polyaniline (PS/PANI) composite microspheres, and studied their electro-responsive electrorheological (ER) performance under an applied electric field strength when dispersed in silicone oil. An over-layer of the conducting PANI is formed by a controlled releasing process of the aniline pre-adsorbed on the PS seed latex without any surface modification, in which the PS seed microspheres were readily prepared by a dispersion polymerization method. The PS microspheres are observed to be regularly encapsulated with PANI from the morphology test. The ER behaviors of the hybrid microspheres are characterized using a rotational rheometer equipped with a high voltage supplier. The yield stress and flow response as a function of shear rate under certain electric field strengths are investigated using the universal yield stress equation and the Cho–Choi–Jhon model of rheological equation of state, respectively. The relaxation time and achievable polarizability of the fluid from its dielectric analysis were also found to be well correlated with the ER performance of the ER fluid.

Smart monodisperse polystyrene/polyaniline core–shell structured hybrid microspheres fabricated by a controlled releasing technique and their electro-responsive characteristics

Bong Jun Park

Papers

Magnetorheology: materials and application

Colloidal graphene oxide/polyaniline nanocomposite and its electrorheology

Smart monodisperse polystyrene/polyaniline core–shell structured hybrid microspheres fabricated by a controlled releasing technique and their electro-responsive characteristics

Magnetic carbonyl iron nanoparticle based magnetorheological suspension and its characteristics

Preparation and magnetorheological characteristics of polymer coated carbonyl iron suspensions