Principle of the use of the major functional properties of plasma in different industries
Low temperature plasma + photocatalysis technology refers to filling the plasma reactor with TiO2 catalysts. When the high energy particles generated by the reactor decompose organic pollutants into small molecules, these substances are further oxidized and decomposed into inorganic small molecules under the action of catalysts to purify and separate the exhaust gases. The photocatalyst and the plasma discharge interact with each other, the catalyst can change the nature of the plasma discharge to produce new active substances with stronger oxidation; while the plasma discharge will affect the chemical composition, specific surface area and catalytic structure of the catalyst to improve its catalytic activity, which greatly enhances the efficiency of low temperature plasma + photocatalytic technology to purify VOCs. The combined technology is more suitable for treating organic waste gas with large air volume and low concentration, and has the advantages of low operating cost, fast reaction rate and no secondary pollution. Plasma surface modification uses high-energy active particles in the plasma to bombard the surface of the material, giving it new surface properties, as only the surface is acted on, the original physical properties of the material remain unchanged. It should be noted that plasma has no requirements for substrate materials and can be used for both surface modification of metallic materials and insulating materials. Plasma cleaning is the process of cleaning a product to improve its ability to print or bond. The purpose of plasma cleaning is to remove organic surface contaminants. Plasma treats the surface of your product to accept the printed adhesive or ink. Often on PTFE or plastics, plasma surface modification actually changes the surface of the material, leaving free radicals and causing it to bond to the adhesive or ink When the plasma interacts with the surface of the object to be cleaned, on the one hand, the use of plasma or plasma-activated chemically active substances and the material surface dirt for chemical reactions, such as the use of active oxygen in the plasma and the material surface of organic matter for oxidation reaction. The plasma acts with the organic dirt on the material surface and decomposes the organic dirt into carbon dioxide, water, etc. for discharge. In the use of plasma for material modification or cleaning, usually use low-temperature plasma, gas temperature is not more than 100 °, which is macroscopic; but from a microscopic point of view, when the plasma and the material surface chemical or physical reaction, if the energy gathered in a local area, once the material treatment time is too long, it may cause damage to some material surface. Plasma etching technology for fiber structure analysis is the earliest application of plasma treatment in the textile industry, and has become a mature technology, another application for the study of textile material modification, surface modification of textile materials with plasma, graft polymerization and plasma polymerization deposition, etc., to change the surface of textile materials (hydrophobic), increase the adhesion, improve the printing and dyeing properties.
Low temperature plasma technology solves environmental engineering sewage using three method
The use of low-temperature plasma technology to treat environmental engineering sewage can achieve better treatment results under the combined action of high-energy electron radiation, ozone oxidation, ultraviolet light decomposition and other methods. The role of high-energy electrons: Low-temperature plasma technology generates a large number of high-energy electrons in the process of sewage treatment. Through collision with atoms and molecules in the wastewater, the energy is converted into the internal energy of the matrix molecules, and the wastewater is activated through multiple processes such as excitation, decomposition, and ionization. The new compounds are formed by breaking down molecular bonds in wastewater and reacting with reactive factors such as free oxygen and ozone. Finally, Z finally converts toxic substances into non-toxic substances and degrades pollutants in raw sewage. Ozone oxidation: In the process of sewage treatment, ozone acts as a strong oxidant to combine harmful substances to form some intermediate products, which reduces the toxicity of the raw sewage and the content of harmful substances. After several reflections, the organic substances of the polluted substances are finally decomposed into carbon dioxide. and water. For inorganic substances, certain oxides can be formed for removal; UV light decomposition: Using low-temperature plasma technology, UV irradiation can decompose harmful substances alone or in combination with ozone. The separation and decomposition is mainly that harmful molecular substances enter the excited state by absorbing photons, break the molecular bonds of molecules by absorbing energy, and then react with free substances in water to generate new compounds and release. The oxidation of ultraviolet rays and ozone can treat refractory substances at the same time, and the effect is better. Refractory organics and pesticides are quickly decomposed.
Study the working environment of plasma to improve the hydrophilicity of PITFE material surface
Study the working environment of plasma to improve the hydrophilicity of PITFE material surface: Polytetrafluoroethylene (PIFE) has been widely used in industrial applications because of its unique properties such as excellent chemical stability, dielectric properties, extremely low coefficient of kinetic friction, good machinability and flame retardancy. Separator paper is also called polyethylene (PE) film. Its function in lithium-ion batteries is to isolate the positive and negative materials. The quality of the separator paper directly affects the safety performance and capacity of the battery. Therefore, the selection of high-quality separator paper has been It is the only way for battery manufacturers. Biocompatible silicone rubber and polyester as a new thermoplastic engineering plastic have a wide range of uses, but due to the poor surface wettability of such polymer materials, their application in some special industrial technology fields such as medical treatment and hygiene is limited. application. Most of the surfaces of new polymer materials are hydrophobic, which limits their applications in bonding and other aspects. Plasma surface modification is to optimize the structure and properties of the material surface by plasma, and it is a very forward-looking material surface modification method. The methods of surface activation mainly include chemical etching method, optical radiation method, plasma treatment method, ion implantation method, surface graft polymerization method, etc. Plasma surface modification is to optimize the structure of the material surface by discharging plasma. Because of its specific environment, cost and other advantages, it has become a commonly used material surface modification method in the industry. PIFE, PE, silicone rubber polyester, banner samples, all can be processed by continuous drive plasma. When the power is the same, the modification effect of plasma is Ar+H, N2, O2 in descending order. The increase of power is not conducive to the improvement of the hydrophilicity of the PIFE sample surface. This is because the high-energy particles in the plasma increase significantly under high power, which strengthens the impact on the surface of the material and makes some active groups on the surface inactive. , thereby reducing the introduction of reactive groups. When the discharge voltage is greater than 10Pa and less than 50Pa, the pressure has no obvious effect on the contact angle. However, when the air pressure is greater than 50Pa, the contact angle increases instead, which may be due to the high air pressure that makes it difficult for the gas to be completely ionized, thus affecting the modification of the PTFE surface. Plasma endows the material with new surface properties, but the effect of plasma surface treatment has a problem of timeliness. It shows a certain change with the placement time. With the extension of time, the surface contact angle will gradually increase. The reasons for the aging wettability decay of plasma treated but not grafted may be multi-faceted, which may be caused by the newly introduced hydrophilic groups sneaking into the surface of the material after being placed for a period of time; it may also be caused by surface generation. The cross-linking chemical reaction reduces the hydrophilicity of the material surface. Therefore, in order to prevent the failure of the plasma-treated surface, grafting, bonding and other treatments must be carried out within a specified time to maintain and make full use of its modification effect. Plasma contains a large number of active particles such as electrons, ions, excited atoms, molecules and free radicals. These active particles interact with polymer materials to cause various physical phenomena such as oxidation, reduction, cracking, cross-linking and polymerization on the surface of the material. And chemical reaction, so as to optimize the surface properties of the material, increase the surface hygroscopicity (or hydrophobicity), dyeability, adhesion, antistatic and biocompatibility. Plasma realizes the surface modification of polymer materials PTFE, PE battery separator, silicone rubber and polyester. Plasma working conditions have a significant effect on improving the hydrophilicity of PITFE material surfaces. After plasma treatment, a large number of polar groups are introduced on the surface of the material, which is the reason for improving its hydrophilicity.
How is the use of plasma cleaners in the electronics industry?
Plasma cleaning machine, also known as plasma surface treatment instrument, is a new high-tech instrument. It uses the properties of active components to treat the surface of the sample to achieve the purpose of cleaning. In addition to cleaning, it can also activate and engrave. Corrosion, etc., are widely used in various fields. Let me give you an example: dry cleaning in the electronic industry cleaning requires a vacuum pump to create a certain vacuum condition to meet the cleaning needs. Let's take a look at the working process and precautions of the plasma cleaning machine. The plasma required for plasma cleaning is mainly generated by specific gas molecules in vacuum, discharge and other special occasions, such as low-pressure gas glow plasma. Simply put, plasma cleaning needs to be carried out in a vacuum state (generally need to be kept at about 100Pa), so a vacuum pump is required for vacuuming. The main process includes: first, the workpiece to be cleaned is sent to the vacuum chamber to be fixed, and the vacuum pump and other devices are started to evacuate to a vacuum degree of about 10Pa; then, the gas for plasma cleaning is introduced into the vacuum chamber (according to the different cleaning materials, The selected gas is also different, such as oxygen, hydrogen, argon, nitrogen, etc.), and the pressure is kept at about 100Pa; a high-frequency voltage is applied between the electrode in the vacuum chamber and the grounding device, so that the gas is broken down and passed through the glow. The light discharge makes it ionized and generates plasma; after the plasma generated in the vacuum chamber completely covers the workpiece to be cleaned, the cleaning operation starts, and the cleaning process lasts for tens of seconds to several minutes. The following is a detailed introduction to what should be paid attention to when using a plasma cleaner. 1. Before starting the plasma cleaning machine, all kinds of preparations must be done. First, the operating staff must be trained in technical aspects, so that they can master the operation procedures and use them in strict accordance with the operation requirements. 2. Before using the plasma cleaning machine formally, it is necessary to correctly set the parameters of its operation, and to carry out the operation carefully according to the instruction manual of the instrument, and it cannot be used arbitrarily. 3. It is necessary to protect the ignition device of the plasma, so as to ensure the normal opening of the plasma cleaning machine, otherwise it will cause difficulty in opening or abnormal opening. 4. If there is no ventilation for the primary air duct, it is necessary to ensure that the operating time of the plasma generator is within the specified time, not longer than the time required in the equipment manual, otherwise the burner will be destroyed, causing a lot of damage. unnecessary loss. 5. Regular maintenance and maintenance. Maintenance and care of plasma cleaners When the power is turned off, the power of the device must be turned off first, and the corresponding operation can be carried out after the power is cut off. It must not be operated with power on to prevent accidents.
How is the use of plasma cleaners in the electronic screen industry?
How is the use of plasma cleaners in the electronic screen industry? Modern touch screens, LCD monitors and TV screens place high demands on the production process, because plastic parts must be treated with highly transparent scratch-resistant and anti-static coatings before bonding and assembly. Removing the impurities on the surface of the mobile phone screen and roughening the surface is conducive to improving the adhesion of the mobile phone screen coating and making it stick more firmly. Our conventional sandpaper polishing is obviously not suitable for use on the mobile phone screen, because it will Scratching the screen of the mobile phone will affect the use. Is there a way to remove the dirt on the surface of the screen and improve the roughness of the surface without affecting its aesthetics? The plasma treatment process of the plasma cleaning machine can be very solve this problem well. First of all, the plasma generated by the plasma surface cleaning machine contains electrons, ions and active free radicals. These particles are relatively easy to react with organic pollutants on the surface of the material to generate volatile and harmless gases, such as CO2 and water vapor. The whole reaction The process time is short, the efficiency is high, and the treatment effect is good. Secondly, when the plasma-treated mobile phone screen is being coated or sprayed, the active components in the plasma will quickly form chemical bonds with the material and the sprayed material. This bonding can greatly improve the strength of intermolecular bonding and make The film layer is difficult to loosen. The COG assembly process of the LCD is to mount the bare IC on the TO glass, and use the compression and deformation of the gold ball to make the pins on the ITO glass and the pins on the IC conduct. Due to the continuous development of fine line technology, it has developed to produce products with a pitch of 20um and a line of 10um. The production and assembly of these fine circuit electronic products have high requirements on the surface cleanliness of the TO glass, and the products are required to have good solderability, firm soldering, and no organic and inorganic substances remaining on the ITO glass to prevent the TO electrode terminals from contacting with each other. The continuity of the IC BUMP, therefore, the cleaning of the TO glass is very important. In the current ITO glass cleaning process, everyone is trying to use various cleaning agents (alcohol cleaning, cotton swab + lemonade cleaning) for cleaning, but due to the introduction of cleaning agents, it will lead to the introduction of cleaning agents. Therefore, exploring new cleaning methods has become the direction of efforts of various manufacturers. Through step-by-step tests, the principle of plasma cleaning is used to clean the surface of ITO glass, which is a more effective cleaning method. In the plasma cleaning of liquid crystal glass, the activated gas used is oxygen plasma, which can remove oily dirt and organic pollutant particles, because oxygen plasma can oxidize organic matter and form gas discharge. Its only problem is that it needs to add a static elimination device after removing the particles, and its cleaning process is as follows: Air blowing - oxygen plasma - static electricity removal The requirements of the electronics industry for a high degree of automation require the adoption of an online surface treatment process with high reliability, high production efficiency and treatment effect. The ultra-fine atmospheric plasma cleaning and plasma activation provided by the plasma process brings effective solutions to the electronics industry. Plasma treatment of the plastic viewing window section prior to antistatic and anti-scratch spraying on spray equipment. Due to the use of plasma cleaning technology, the surface energy of the material is increased, so the coating distribution is more uniform, the plasma cleaning machine not only creates an impeccable product appearance, but also greatly reduces the scrap rate in the production process.
The application of plasma automatic cleaning machine processing circuit board LED bonding packaging technology
The application of plasma automatic cleaning machine processing circuit board LED bonding packaging technology: Printed circuit boards, printed boards, PCBs, etc. are also called printed boards. The printed circuit board is prone to problems such as unclear printing, blurred printing, easy falling off of ink or non-staining of the printed circuit board during the printing process. The main reasons for this phenomenon are: first, the green paint surface of the circuit board is not clean, with oil stains, sweat stains, particles and other dirt; second, the ink quality is poor, and the amount of ink is insufficient, which has little effect. Third, the squeegee is not sharp enough or is blurred due to improper operation during the screen printing process. LED is more and more favored by people because of its high light efficiency, low power consumption, health and environmental protection (no ultraviolet, infrared, no radiation), protection of eyesight, long life and other advantages, and is known as the 21st century. new light source. In the packaging process LEDLED will produce pollution and oxidation. The bonding colloid between the lampshade and the lamp holder is not strong enough, and there are tiny gaps, air enters through the gap, and gradually causes the surface of the electrode to oxidize, resulting in the death of the lamp holder. The application of plasma automatic cleaning machine cleaning technology to clean LED packaging products does not pollute the environment, environmental protection and no pollution, which can solve this problem for LED packaging manufacturers. To solve the above problems. Mainly consider the following issues: whether the screen frame is in good condition, whether the image production is clear, whether the ink scraping is correct, whether the screen frame is installed smoothly, whether the pressure is uniform, whether the screen frame height is balanced, and whether the ink is scraped and printed. Is the pressure appropriate. After the above conditions are met, the plasma automatic cleaning machine can be used to remove glue for the manufacturing process of soft and hard boards, high-frequency PTFE, multi-layer soft boards, etc. cleaning etc. It can solve the problem of unclear printing in PCB production. There are two main reasons for the weak bonding of fluorescent diodes. In the production process, the surface will inevitably be contaminated with many pollutants (such as organic substances, oxides, epoxy resin, particles, etc.), thus affecting the bonding effect. Light-emitting diodes are mainly made of difficult-to-stick plastics such as polypropylene and PE. This kind of plastic has the characteristics of low surface energy, poor wettability, high crystallinity, good non-polarity of molecular chain and fragile edge. In the bonding and packaging process, it is easy to cause the phenomenon of loose glue opening. Plasma cleaning of electronic parts: Because the plasma is positive and negative ions, the potential value of the plasma cleaning machine for electronic parts is zero. Avoid short circuit of circuit boards and damage to electronic equipment. Plasma automatic cleaning machine can provide ultra-precise circuit board cleaning, destaticization, dust removal, area activated plasma, and solve the problem of poor coating adhesion performance. Applying an ultra-thin, long-term stable selective anti-corrosion coating on the surface of electronic components can prevent electronic components from being corroded or damaged in extreme weather conditions. The plasma automatic cleaning machine equipment properly solves these two problems during the LED lamp plasma cleaning process. The plasma automatic cleaning machine acts on the surface of the material, and the positive and negative plasma generated can realize the physical and chemical cleaning of the surface of the LED material. Removal of contaminants down to the nanometer level, can remove surface contaminants such as organics, oxides, epoxy, particles, etc. When processing PP/PE and other plastics, the plasma generated by the automatic plasma cleaning machine pretreats the parts that need to be bonded through surface activation, surface corrosion, surface grafting, surface polymerization, etc., so that the non-polar materials are activated. This ensures reliable bonding and long-term sealing.
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