Diffusion control of strongly correlated electrically conductive particles in a liquid medium by applying graded electromagnetic fields

2012 ◽  
Vol 7 (6) ◽  
pp. 554-558
Author(s):  
Yujiro Naruse
Keyword(s):  
Liquid Medium ◽  
Electromagnetic Fields ◽  
Diffusion Control ◽  
Strongly Correlated ◽  
Electrically Conductive ◽  
Conductive Particles

Protection Against Electromagnetic Fields by Means of Fractal Screen-Restructor

10.12737/2744 ◽  
2013 ◽  
Vol 20 (4) ◽  
pp. 116-120
Author(s):  
Хачапуридзе ◽  
N. Khachapuridze ◽  
Филиппов ◽  
Yu. Filippov ◽  
Соколовская ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
High Efficiency ◽  
Three Dimensional ◽  
Small Diameter ◽  
Medical Personnel ◽  
Negative Influence ◽  
Electrically Conductive ◽  
Electromagnetic Screen ◽  
Biological Protection ◽  
Made In

To protect medical personnel and other institutions where used low- intensity electromagnetic fields the fractal electromagnetic screen-restructor was developed. This device contains a substrate of bioinert material and installation tool, which is made in the form of electromagnetic circuit, which includes overlapping concentric circles of big and small diameters and flat element located in the centre of the circle formed by the circles of the big diameter. A circle of small diameter located on six radial lines, circles of the big diameter equidistantly in relation to each other and relative to the center of the circles of the big diameter, and the flat element is made in the form of a regular hexagon. The screen was tested and has shown high efficiency. The developed fractal screen is the medical technique and is used to protect personnel from the negative influence of various fields of electro - and radio-technical installations, from unauthorized exposure, as well as for biological protection and correction of the functional state of operators industrially loaded productions. There are many devices designed for protection of an organism from the negative electromagnetic radiation, to maintain and enhance its bioenergetic potential, containing a variety of three-dimensional constructs and two-dimensional plate-a matrix, equipped with various geometric structures of electrically conductive materials, or diminutive volume elements - cylindrical or cone-shaped and their combinations.

Experimental Study of Loss Mechanisms in Polymer-Metal Composites at Microwave Frequencies

1994 ◽  
Vol 347 ◽  
Author(s):  
John P. Ludman ◽  
Curtis H. Stern
Keyword(s):  
Iron Concentration ◽  
Microwave Cavity ◽  
Complex Permeability ◽  
Dc Resistivity ◽  
Low Loss ◽  
Electrically Conductive ◽  
Metal Composites ◽  
Microwave Frequencies ◽  
Polymer Metal ◽  
Conductive Particles

ABSTRACTThe microwave heatability of a low loss polymer (polypropylene) was enhanced by the addition of a conductive powder (iron). The effects of the amount (5–40% iron by volume) and size of the conductive particles on the microwave heatability were studied. The complex permittivity and complex permeability at microwave frequencies and the dc resistivity were measured. Samples were also heated in a multimode microwave cavity. Results show that microwave heating increased with increasing iron concentration. However, the penetration depth of the microwaves decreased with increasing iron content, and dramatically decreased when the polypropylene-iron composites became electrically conductive at the percolation threshold.

scholarly journals Development of an Elastic, Electrically Conductive Coating for TPU Filaments

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7158
Author(s):  
Henriette Grellmann ◽  
Mathis Bruns ◽  
Felix Michael Lohse ◽  
Iris Kruppke ◽  
Andreas Nocke ◽  
...  
Keyword(s):  
Thermoplastic Polyurethane ◽  
Mechanical Strain ◽  
Special Focus ◽  
Electrically Conductive ◽  
Mechanical And Electrical Properties ◽  
Elastic Filaments ◽  
Wide Range ◽  
Conductive Fibers ◽  
Multifilament Yarns ◽  
Conductive Particles

Electrically conductive filaments are used in a wide variety of applications, for example, in smart textiles and soft robotics. Filaments that conduct electricity are required for the transmission of energy and information, but up until now, most electrically conductive fibers, filaments and wires offer low mechanical elongation. Therefore, they are not well suited for the implementation into elastomeric composites and textiles that are worn close to the human body and have to follow a wide range of movements. In order to overcome this issue, the presented study aims at the development of electrically conductive and elastic filaments based on a coating process suited for multifilament yarns made of thermoplastic polyurethane (TPU). The coating solution contains TPU, carbon nanotubes (CNT) and N-Methyl-2-pyrrolidone (NMP) with varied concentrations of solids and electrically conductive particles. After applying the coating to TPU multifilament yarns, the mechanical and electrical properties are analyzed. A special focus is given to the electromechanical behavior of the coated yarns under mechanical strain loading. It is determined that the electrical conductivity is maintained even at elongations of up to 100%.

scholarly journals Lightning Strike Protection of Aircraft Composite Structures: Analysis and Comparative Study

2016 ◽  
Vol 2016 (8) ◽  
pp. 49-54 ◽  
Author(s):  
Andrzej Katunin
Keyword(s):  
Comparative Study ◽  
Composite Structures ◽  
Conductive Polymers ◽  
Lightning Strike ◽  
Electrically Conductive ◽  
Lightning Strikes ◽  
Conductive Composites ◽  
University Of Technology ◽  
Electrical Conducting ◽  
Conductive Particles

AbstractLightning strikes are a serious problem during operation of aircraft due to the increasing applicability of polymeric composites in aircraft structures and the weak electrical conducting properties of such structures. In composite structures, lightning strikes may cause extended damage sites which require to be appropriately maintained and repaired leading to increased operational costs. In order to overcome this problem various lightning strike protection solutions have been developed. Some of them are based on the immersion of metallic elements and particles while others use novel solutions such as intrinsically conductive polymers or other types of highly conductive particles including carbon nanotubes and graphene. The concept of fully organic electrically conductive composites based on intrinsically conductive polymers is currently being developed at the Silesian University of Technology. The results obtained in numerous tests, including concerning electrical conductivity and the capability to carry on high-magnitude electrical charges as well as certain operating properties need to be compared with existing solutions in lightning strike protection of aircraft. The following study presents the properties of the material developed for lightning strike protection and a comparative study with other solutions.

scholarly journals Extracellular Electron Uptake by TwoMethanosarcinaSpecies

2018 ◽  
Author(s):  
Mon Oo Yee ◽  
Oona Snoeyenbos-West ◽  
Bo Thamdrup ◽  
Lars DM Ottosen ◽  
Amelia-Elena Rotaru
Keyword(s):  
Value Added ◽  
Surface Proteins ◽  
Redox Potentials ◽  
Electrically Conductive ◽  
Geobacter Metallireducens ◽  
Direct Interspecies Electron Transfer ◽  
Interspecies Electron Transfer ◽  
Relevant Group ◽  
Surface Redox ◽  
Conductive Particles

AbstractDirect electron uptake by prokaryotes is a recently described mechanism with a potential application for energy and CO2storage into value added chemicals. Members of Methanosarcinales, an environmentally and biotechnologically relevant group of methanogens, were previously shown to retrieve electrons from an extracellular electrogenic partner performing Direct Interspecies Electron Transfer (DIET) and were therefore proposed to be electroactive. However, their intrinsic electroactivity has never been examined. In this study, we tested two methanogens belonging to the genusMethanosarcina, M. barkeriandM. horonobensis,regarding their ability to accept electrons directly from insoluble electron donors like other cells, conductive particles and electrodes. Both methanogens were able to retrieve electrons fromGeobacter metallireducensvia DIET. Furthermore, DIET was also stimulated upon addition of electrically conductive granular activated carbon (GAC) when each was co-cultured withG. metallireducens. However, when provided with a cathode poised at −400 mV (vs. SHE), onlyM. barkericould perform electromethanogenesis. In contrast, the strict hydrogenotrophic methanogen,Methanobacterium formicicum, did not produce methane regardless of the type of insoluble electron donor provided (Geobactercells, GAC or electrodes). A comparison of functional gene categories between the twoMethanosarcinashowed differences regarding energy metabolism, which could explain dissimilarities concerning electromethanogenesis at fixed potentials. We suggest that these dissimilarities are minimized in the presence of an electrogenic DIET partner (e.g.Geobacter), which can modulate its surface redox potentials by adjusting the expression of electroactive surface proteins.

INFLUENCE OF THE COMPOSITION AND CONDITIONS OF HEAT TREATMENT OF THE CONDUCTIVE PROPERTIES OF SILVER-CONTAINING ELECTRICALLY CONDUCTIVE ADHESIVE COMPOSITIONS (review). Part 1

2021 ◽  
pp. 64-77
Author(s):  
K.L. Besednov ◽  
◽  
A.P. Petrova ◽  
N.Ph. Lukina ◽  
A.Yu. Isaev ◽  
...  
Keyword(s):  
Component Composition ◽  
Conductive Adhesive ◽  
Electrically Conductive ◽  
Curing Conditions ◽  
Adhesive Compositions ◽  
Electrically Conductive Adhesive ◽  
Resin Part ◽  
Conductive Properties ◽  
Conductive Particles ◽  
Effect Of Surface

Data on the use of various types of silver filler in electrically conductive adhesive compositions are presented. The influence of form and size particles of silver filler on the conductive properties of adhesive bondline. The effect of surface treatment of conductive particles with surfactants, the component composition of the resin part and the curing conditions of conductive adhesive compositions on their microstructure and conductive properties is shown. An overview of the results of studies of the microstructure of conductive silver-containing adhesive compositions is given.

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