Accumulation Of Static Electricity Research Articles

Graphene nanoplatelets/lead azide composites for the depressed electrostatic hazards

Graphene nanoplatelets/lead azide composites (GLA) were prepared by adding graphene nanoplatelets (GNP) to the reaction solution or coating the normal lead azide (LA) with GNP. Scanning electron microscopy (SEM), Raman spectroscopy and X-ray diffraction (XRD) were used to characterize the morphology and the composition of the products. The electrostatic spark sensitivity and static electricity accumulation of the obtained samples were investigated in detail. Results exhibit excellent anti-electrostatic performance.

A novel approach to electrically and thermally conductive elastomers using graphene

Electrically and thermally conductive elastomers are highly desired in industries, since they can prevent static electricity accumulation and reduce internal heat build-up. Previous methodologies using carbon black, metal nanoparticles and carbon nanotubes are either ineffective or expensive. By contrast, we in this study developed electrically and thermally conductive, high-mechanical performance elastomers, by adopting cost-effective, high-structural integrity graphene platelets (GnPs) of 3.55 ± 0.32 nm in thickness and employing an industrial compatible method. A percolation threshold of electrical conductivity was observed at 16.5 vol% GnPs, and the elastomer thermal conductivity improved 240% at 41.6 vol%. At 24 vol%, tensile strength, Young's modulus, and tear strength improved 230%, 506% and 445%, respectively. By comparing the reinforcement effect of GnPs with those of carbon black, multi-walled carbon nanotubes and silicate layers, we found that GnPs are a promising candidate for developing cost-effective, functional, high-mechanical performance elastomers.

The facile synthesis of graphene nanoplatelet–lead styphnate composites and their depressed electrostatic hazards

Graphene nanoplatelet–lead styphnate composites (GLS) were prepared either by adding graphene nanoplatelets (GNP) to the reaction solution or by coating normal lead styphnate (LS) with GNP. The composites exhibited excellent anti-electrostatic performance with depressed electrostatic spark sensitivity and static electricity accumulation.

Technology for production of combined conductive yarn of high linear density for carpets

Twist from 95 to 107 tw./m and microwire tension of 20 to 26 cN must be used for manufacturing combined conductive yarn. The decrease in the resistivity of the yarn and the strength level allows preventing accumulation of static electricity on the surface of carpets.

The use (and misuse) of bonding for control of static ignition hazards

AbstractIn this paper, specific procedures to minimize potential hazards related to the accumulation of static electricity are addressed. The hazards of concern herein are those arising from the ignition of mixtures of air and flammable gases, vapors, and dusts. Accordingly, concerns related to process operability, sensitivity or reliability of electronic components, or nuisance effects are not considered. Also, ignition of condensed phase explosives or oxygen enriched systems are not specifically included through many of the principles and conclusions discussed below will apply.

A Technical Assessment of the Static Decay Properties of Various Conductive Plastic Materials

Abstract Plastic materials are inherently insulators and hence susceptible to the accumulation of static electricity. This buildup of static charge may create severe problems in many areas where plastics are used such as in hospital environments, fiber spinning and processing, explosives manufacture, and packaging of sensitive electronic components. With the ever-increasing use of electronic integrated circuits in business equipment, the need to protect these circuits from operator-induced static discharge (such as obtained from walking on a carpet) becomes vitally important. Therefore, the ability to eliminate unwanted static charges at low cost is very desirable.

Use of Additives for Improving the Properties of Man–made Fibres Obtained from Solutions

A study of the effect of various non–solvents, plasticizing compounds and salts on the properties of man–made fibres was carried out on acrylic, viscose and acetate fibres. The addition of non–solvents to the spin–solution of acrylic copolymers decreases the viscosity and permits an increase in the concentration of the spinning solution giving improved fibre properties.The addition of non–solvents to viscose and acetate fibres produces similar results, the most effective being with viscose fibres.The addition of plasticizing compounds improves the sorption properties of fibres and decreases their electrical resistance.The treatment of gels of acrylic fibres with salts improves their dyeing properties and decreases the accumulation of static electricity.

Static Electricity in Carpets

The corona-discharge method of measuring static charge susceptibility of carpets is used to evaluate the static propensity of fibers in various carpet samples. Triboelectric balancing, addition of internal or external antistatic agents, and inclusion of conductive fibers are suggested as approaches toward controlling problems associated with static electricity accumulation in carpets. Emphasis is placed on the use of conductive filers, and possible mechanisms are given by which conductive fibers reduce static electricity buildup.

Static electricity in the drying of pharmaceutical chemical products

In the pharmaceutical chemicals industry, as in other branches of the national economy, technological processes with active hydrodynamic conditions are being successfully introduced; this relates especially to drying, pneumatic transport, and other processes connected with the treatment of solid pulverulent materials. In this field, the formation and accumulation of static electricity, which has an enormous influence on the hydrodynamics, heat exchange, and safety of the operation of highly effective processes ,must be regarded a s little-studied phenomena.

INACCURACY OF ANAESTHETIC FLOWMETERS CAUSED BY STATIC ELECTRICITY

An account is given of types of anaesthetic flowmeters, and it is shown that sticking of the flowmeter bobbin due to accumulation of static electricity may cause a flowmeter inaccuracy of 35 per cent as an average. Possible precautions against this cause of error are discussed.

Electrically Conducting Rubber

Abstract In recent years the dangers and inconveniences arising from the presence of static electrical charges on rubber conveyor belts, rubber flooring, rubber-tired vehicles and the like, have aroused interest in the use of electrically conducting rubber as a means of minimizing the accumulation of static electricity. Conventional rubber compounds, which have electrical resistivities normally above 107 ohm-cm, and as high as 1014–1016 ohm-cm. for nonblack compositions, favor the accumulation of static charges. By using high loadings of channel black, the resistivity can be reduced considerably. If special types of carbon black are employed the resistivity can be reduced to a very low value ; in fact, the development of a compound with a resistivity of 1 ohm-cm. has been reported. A compound with a resistivity of about 10 ohm-cm., processible on ordinary factory-size rubber machinery, is described later in this paper. Rubber compounds with resistivities less than 107 ohm-cm. are generally grouped under the generic title of “electrically conducting rubbers”. The conduction of electricity through rubber-carbon black compositions is attributed to the ability of the carbon black to form chains of particles through the rubber. The formation of these chains depends on the particle size, crystal structure, and degree of dispersion of the black. The special types of black referred to above, termed conducting blacks, possess this ability for chain formation to an advanced degree. The work described below deals with the compounding of conducting rubbers, their application, and the methods used for testing. It appears under three main headings: measurement of resistivity; development of highly conducting rubber ; and development and testing of antistatic tires.