Fabrication of polyaniline/polyimide composite fibers with electrically conductive properties

2016 ◽  
Vol 367 ◽  
pp. 335-341 ◽  
Author(s):  
Pengxia Lv ◽  
Yong Zhao ◽  
Fangfang Liu ◽  
Guomin Li ◽  
Xuemin Dai ◽  
...  
Keyword(s):  
Composite Fibers ◽  
Electrically Conductive ◽  
Conductive Properties

Possibilities of Utilization of Waste Materials in Production of Electrically Conductive Composites on Silicate Basis

2021 ◽  
Vol 321 ◽  
pp. 171-176
Author(s):  
Jana Majerová ◽  
Rostislav Drochytka
Keyword(s):  
Nickel Powder ◽  
Cement Composite ◽  
Wire Drawing ◽  
Waste Materials ◽  
Electrically Conductive ◽  
Conductive Composites ◽  
Steel Wires ◽  
The Subject ◽  
Conductive Properties ◽  
Functional Fillers

The electrical conductivity of concrete can be achieved by adding steel wires or functional fillers. Commonly used fillers are nanotubes, carbon black, nickel powder and so on. These fillers are expensive, but there is a possibility to use waste materials. This is the subject of this experiment. The conductive properties of conductive sand, sludge from the wire drawing process, iron grinding dust waste and waste carbon were verified. From these fillers, waste carbon showed the best electrical properties (impedance). The impedance of the waste carbon was 0.31 Ω and the impedance of the cement composite containing 70% of the weight of waste carbon was less than 670 Ω.

scholarly journals Justification of the active method of protecting the insulation of submersible electric motors

2019 ◽  
Vol 124 ◽  
pp. 02003
Author(s):  
V. A. Trushkin ◽  
O. N. Churlyaeva ◽  
R. V. Kozichev
Keyword(s):  
Physical Properties ◽  
Electrical Breakdown ◽  
Electrical Equipment ◽  
Working Environment ◽  
Operating Parameters ◽  
Insulation Resistance ◽  
Electric Motors ◽  
Electrically Conductive ◽  
Active Method ◽  
Conductive Properties

The article provides an analysis of the properties of the working environment of submersible electrical equipment. The influence of the operating parameters of electrical equipment on the physical properties of the fluid (its electrically conductive properties) is considered. Mathematical confirmation of the implementation of electroosmosis in the capillaries of the insulation of submersible electric motors is given. The rationale for the active method of protecting submersible electrical equipment from reducing insulation resistance and preventing electrical breakdown is given.

Study on the Properties of Melt Spinning PAN/MWNTs Composite Fibers

2012 ◽  
Vol 217-219 ◽  
pp. 567-570
Author(s):  
Dan Wang ◽  
Ke Qing Han ◽  
Wen Hui Zhang ◽  
Bin Yan ◽  
Yin Cai Tian ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquids ◽  
Melt Spinning ◽  
Composite Fibers ◽  
Multi Walled Carbon Nanotubes ◽  
Conductive Properties ◽  
Walled Carbon Nanotubes

Polyacrylonitrile（PAN）/multi-walled carbon nanotubes (MWNTs) composite fibers were prepared by melt spinning using ionic liquids (ILs) as a plasticizer. The effects of different MWNTs contents on the morphology, mechanical and conductive properties of the composite fibers were discussed. The results showed that property improvements have occurred with the adding of MWNTs. When the content of MWNTs reached 10%, the conductivity of PAN/MWNTs was 8.65×10-3 S/cm.

scholarly journals Design and Development of an E-Textile Mat for Assuring the Comfort of Bedridden Persons

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5437
Author(s):  
Daniela Sofronova ◽  
Radostina A. Angelova ◽  
Yavor Sofronov
Keyword(s):  
Body Position ◽  
Production Method ◽  
High Wear Resistance ◽  
Continuous Control ◽  
Decubitus Ulcers ◽  
New Production ◽  
Electrically Conductive ◽  
Software Application ◽  
Non Invasive ◽  
Conductive Properties

An e-textile mat with capacitive textile sensors was designed and manufactured to monitor body position and prevent decubitus ulcers in the case of bedridden people. The sensors were incorporated through a process of machine embroidery with electrically conductive threads. A new production method for the conductive threads is still expected to be developed, resulting in good conductive properties, high wear resistance and durability. Samples of five variants of motifs without cross-stitching were studied, and the capacity and electrical resistance were determined experimentally. A prototype of the e-textile mat was made with a motif showing the best ratio between the inserted thread and the measured capacity. A hardware solution and a software application for collecting, processing and visualising the received information were developed. Tests were performed in real conditions, which clearly showed that the designed e-textile mat could be successfully applied for non-invasive and continuous control of the position of the human body in a supine position to prevent decubitus ulcers.

Directed Regulation and Localization of Electrical Properties for Composite Construction Materials

2021 ◽  
Vol 325 ◽  
pp. 119-124
Author(s):  
Aleksandr Nikolaevich Gumenyuk ◽  
Irina Sergeevna Polyanskikh ◽  
Igor Aleksandrovich Pudov ◽  
Philip Evgenyevich Shevchenko ◽  
Natalia Vilorievna Kuzmina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Construction Materials ◽  
Electrical Current ◽  
Dielectric Behavior ◽  
Electrically Conductive ◽  
Copper Electrodes ◽  
It Efficiency ◽  
Conductive Properties ◽  
First Time ◽  
Corrosive Resistance

Research results of modified composites which consist of isolated layers with different properties and their practical usages are represented in this article. A structure of the composite material is considered. The structure is combined of few layers; external layers are made of corrosive resistance material with dielectric behavior while the internal part of the composite is made of electrically conductive material with high conductive and mechanical properties. Conductive properties of each layer have been measured as well as their mechanical properties and structure. Also, the features of the joints between layers in terms of structure and properties were defined. More than that, varieties of mixtures and their possible usage are considered. Conductive properties of composite materials and ways of their adjustment have been described as well. For the first time, the measuring scheme of conductive properties for each layer was offered and heat shrinkable tubes and copper electrodes were used for it. Efficiency of modified composites and its behavior when electrical current applied can be measured by using the scheme.

scholarly journals Impact of Carbon Particle Character on the Cement-Based Composite Electrical Resistivity

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7505
Author(s):  
Vít Černý ◽  
Grigory Yakovlev ◽  
Rostislav Drochytka ◽  
Šimon Baránek ◽  
Lenka Mészárosová ◽  
...  
Keyword(s):  
Construction Industry ◽  
Fine Particles ◽  
Raw Materials ◽  
Carbon Particle ◽  
Silica Sand ◽  
Composite Matrix ◽  
Electrically Conductive ◽  
Conductive Fillers ◽  
Conductive Properties ◽  
The Impact

Electroconductive cement-based composites are modern materials that are commonly used in many industries such as the construction industry, among others. For example, these materials can be used as sensors for monitoring changes in construction, grounding suspension, and resistance heating materials, etc. The aim of the research presented in this article is to monitor the impact of carbon particle character on cement-based electroconductive composites. Four types of graphite were analyzed. Natural and synthetic types of graphite, with different particle sizes and one with improved electrically conductive properties, were tested. For the analysis of the electrical conductivity of powder raw materials, a new methodology was developed based on the experience of working with these materials. Various types of graphite were tested in pure cement paste (80% cement, 20% graphite) as well as in a composite matrix, which consisted of cement (16.8%), a mixture of silica sand 0–4 mm (56.4%), graphite filler (20.0%) ground limestone (6.7%) and super plasticizers (0.1%). The resistivity and physical-mechanical properties of the composite material were determined. Furthermore, the resistivity of the test samples was measured with a gradual decrease in saturation. It may be concluded that graphite fillers featuring very fine particles and high specific surface are most suitable and most effective for creating electrically conductive silicate composites. The amount, shape and, in particular, the fineness of the graphite filler particles thus creates suitable conditions for the creation of an integrated internal electricity-conductive network. In the case of the use of a coarse type of graphite or purely non-conductive fillers, the presence of an electrolyte, for example, in the form of water, is necessary to achieve a low resistivity. Samples with fine types of graphite fillers achieved stable resistivity values when the sample humidity changed. The addition of graphite fillers caused a large decrease in the strength of the samples.

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.

Sign in / Sign up

Export Citation Format

Share Document