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    Home > Coatings News > Coating Technologies > How much do you know about conductive coatings?

    How much do you know about conductive coatings?

    • Last Update: 2020-05-21
    • Source: Internet
    • Author: User
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    Conductive coatings have been around for half a centuryThe first publicly available conductive coating was1948, when the United States published a patent to make conductive adhesives silver and epoxy resinIn the 1950s, China also began to study and apply conductive coatingsIn recent decades, conductive coatings have been applied inelectronics, electrical appliances, aviation, chemical, printing and other military and civil industriesCorrespondingly, the theoretical research of conductive coatings has also been developed rapidly, and promoted the increasing maturity and perfection of applied technologyAccording to the classification of applied materials, conductive materials can be divided into-type conductive coatings
    anddoped conductive coatingsthis type of conductive coating
    refers to the conductive coating made of the original type conductive polymer as a membrane substanceThe main use of the main type of conductive coatingsanti-corrosion anti-static coatings, wave-absorbing coatings, electromagnetic shielding coatings
    and so ondoped conductive coating
    refers to the use of conductive substances based on polymer-based addition of conductive substances Commonly used conductive fillers are metal line fillers, carbon-system fillers, metal oxide serlomen, composite fillers, new nano-conductive fillers
    , etc Because doped conductive coatings are less expensive and easy to use, they are widely used in addition, , conductive coatings can also be divided according to the characteristics of the application: the use of conductive coatings, radiation shielding coatings, anti-static coatings and so on out of the importance of anti-static coatings, next to introduce to you about anti-static coatings On September 29, 2019, a fire broke out at Ningbo Ritchie Daily Products Co., Ltd The incident killed 19 people and injured three others, a total area of about 1100m2 The accident investigation team determined that the direct cause of the accident was that when Ruiqi employee Sun Yansong poured the heated isomer alkane mixture into a plastic bucket, caused combustible vapor fire caused by electrostatic discharge and spread into a disaster, the employee tried to blow out with his mouth and fan the fire, which eventually led to the spread of the fire the dangers of static electricity are obvious to all according to incomplete statistics, in recent years, China's petrochemical enterprises have occurred a number of static disaster accidents, losses of hundreds of millions of dollars even in life, static fires are everywhere can generate static electricity at any time, any place in people's lives in industrial production, static electricity can cause electromagnetic interference, cause the failure of electronic equipment or action by mistake, in flammable explosive materials or dust, oil mist production, storage places, equipment easily cause explosions and fires, other harms that are not conducive to production operations, affect product quality it is almost impossible to completely eliminate static electricity, but some measures can be taken to control static electricity so that it does not cause harm For example: the use of electrostatic coating anti-corrosion electrostatic coating is the most common means of prevention and control Anti-static coatings can conduct electricity, mainly because of the addition of conductive materials to contact and link with each other, forming a conductive path, and ultimately achieve anti-static effect the current market anti-static paint, basically doped conductive paint Therefore, anti-static coatings are also divided into: metal system (silver, copper, nickel, zinc, etc.), carbon system (conductive graphite or carbon black), metal oxide system (tin oxide, zinc oxide, titanium dioxide treatment, added tin oxide, etc.) and so on carbon conductive coating
    carbon conductive coating is an old material, used as carbon conductive coating conductive fillers are mainly graphite, a variety of carbon black , graphite fiber, carbon fiber, high temperature calcination petcoke and silicon carbide With cheap , small density, not easy to settle, strong corrosion resistance and other advantages but relatively poor conductivity, and because the surface contains a large number of polar groups, there are difficult to disperse, easy flocculation and other shortcomings Colors can only be black or dark with the development of nanotechnology, graphite nanomaterials and substrate composite conductive polymer materials are increasingly emerging, expansion graphite as a new type of conductive filler, with conductive , friction loss is small, pollution of small and other advantages the conductive properties of the metal line conductive coating
    the conductive properties of the metal line conductive coating depends on the type, quantity, type of metal fiber and metal powder, the type of metal fiber and metal powder, the shape of the filler, the conductivity can basically meet the requirements, but the color of the coating is limited by the color of the metal powder Metal fillings are mainly silver powder, nickel powder, copper powder and zinc powder Because silver powder is more expensive, more used in the military field, in civilian use is less Although copper powder is cheap, it is easy to oxidize and its conductivity is unstable metal oxide conductive coating
    metal oxidebecause of its excellent conductive properties, light color, better to complement the metal conductive pigment corrosion resistance poor and carbon conductive pigment decorative performance is poor commonly used composite fillers are glass beads, copper powder and mica powder outsourcing silver powder, carbon black outsourcing nickel powder and many other Metal oxide conductive pigments are mainly doped tin oxide, zinc oxide, molybdenum dioxide and so on conductive coating softens are usually characterized in three characteristics: volume resistivity or conductivity; There are customer feedback, there is always the purchase of products with a press-type instrument to measure the surface resistance "unqualified" problem exists " First of all, there is no national standard or industry standard that recognizes the use of pressure resistance test meters The test equipment and methods of the electrostatic/electrostatic dissipative material in the national standard have clear requirements: the test electrode weight and size, the test voltage of different resistance intervals caused the resistance measurement result is too large mainly because the output voltage of the pressure gauge is only 9V, measuring the surface resistance in 10 3-5 times of the model, the measurement results are relatively accurate When measuring a sample of 6-9 times of surface resistance at 10, the result is too large due to the low test voltage provided in addition, press meter and powder model contact is not sufficient, contact area is less than the requirements of the national standard, resulting in resistance test results are large, such as the encounter of grain powder on a greater impact "
    sound clear: this number of reprints, sharing, statements, views to maintain neutral, the purpose is only for industry exchanges, copyright is owned by the original author such as copyright and intellectual property rights and other infringement issues, please contact this number backstage, immediately delete the content processing this article by the "Companion Editor" to provide technical support
    Shenzhen Coatings Technology Institute leading the industry to the global deep coating introduction: according to the Shenzhen Science and Technology Association (2012) No 13 "on the consent to the establishment of the Shenzhen Institute of Coatings Technology" and the Shenzhen Civil Affairs Bureau (2012) No 265 "on the establishment of the Shenzhen Coatings Technology Society registration approval" and other documents Shenzhen Coatings Technology Society was officially established in Shenzhen on April 28, 2012 The establishment conference of the Institute of Coatings Technology gathered more than 400 well-known enterprises in the national paint industry and related people, attracting more than 200 well-known enterprises at home and abroad to join the Coatings Society
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