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Low temperature plasma surface treatment for our benefits

Low temperature plasma surface treatment for our benefits

Low-temperature plasma is mainly used in all aspects of industrial production. Low-temperature plasma and plasma surface treatment bring many benefits to our life and play a very important role in improving air quality. Plasma treatment equipment mainly include: atmospheric direct injection plasma surface treatment equipment, atmospheric pressure rotary plasma surface treatment equipment, dielectric plasma surface treatment equipment, vacuum plasma cleaning machine, etc. Plasma treatment equipment is very common in our daily life, as well as JYS series of plasma treatment equipment, GDR series of plasma treatment equipment, the application of low-temperature plasma technology, reduce the exhaust emissions, improve the environmental quality. The therapeutic apparatus made of low-temperature plasma has become the first choice in the treatment of rhinitis, which solves the previously untreatable diseases. Rhinitis is a headache for the majority of patients, they must carry enough toilet paper to solve the problem of the nose. Since the use of low-temperature plasma therapy equipment rhinitis treatment, more patients have been cured, life has become easier, especially seasonal rhinitis patients have been relieved. Low-temperature plasma technology is also used in sterilization, deodorization, catalyst field, etc. Plasma surface processors make our living environment better.

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Three applications of plasma cleaning in the lithium battery industry

Three applications of plasma cleaning in the lithium battery industry

The production and manufacture of lithium-ion batteries are closely linked by each process step. Generally speaking, the production of lithium batteries consists of three parts: the fabrication of the electrode, the fabrication of the cell and the assembly of the battery. There are several key processes in these three processes, and the performance of batteries produced by different production processes is very different. The addition of plasma cleaning in the three processes can greatly improve the level of battery manufacturing. PLASMA cleaning is used before PLASMA coating: The anode and cathode pieces of lithium battery are made by coating the anode and cathode materials of lithium battery on the metal thin strip. When coating the electrode material, the metal thin strip needs to be cleaned. The metal thin strip is usually aluminum thin or copper thin. Plasma dry cleaning machine effectively solve the above problems. Plasma cleaning before battery welding: Plasma cleaning is a dry cleaning, mainly depends on the active ion in the plasma "activation" to remove the object surface stains. This method can effectively remove the dirt and dust on the end face of the battery pole column, and make preparation for the battery welding in advance, so as to reduce the defective products of welding. PLASMA cleaning during battery assembly: In order to prevent lithium battery from safety accidents, it is generally necessary to glue the lithium battery cell to play the role of insulation, prevent the occurrence of short circuit, protect the circuit and prevent scratch. Clean the insulation board and end board, clean the dirty surface of the cell, roughen the surface of the cell, and improve the adhesion of adhesive or glue coating. Depending on the "five actions" of the active particles in the plasma, the bonding, bonding, welding, coating, bonding and removing adhesive effects can be enhanced. The pollutants may be organic matter, epoxy resin, photoresist, oxide, particulate pollutants, etc. Different cleaning processes should be adopted for different pollutants, and different process gases should be selected.

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Plasma sterilization technology

Plasma sterilization technology

Plasma sterilization technology is a new generation of high-tech sterilization technology, which can overcome some limitations and shortcomings of existing sterilization methods and improve the disinfection and sterilization effect. For example by high temperature steam method and infrared method is not suitable for sterilization processing of plastics, fiber, artificial crystals and optical glass materials and microwave method processing metal objects, weak and not easy to achieve disinfection effect of the place such as corner crack, using this technology, can very well under low temperature to eliminate bacteria sterilization processing without damages to the processed goods. The plasma working material used in this technology is non-toxic and harmless. The technology can also be used in the production line to sterilize and sterilize the products. Mechanism of plasma sterilization: 1, the role of active groups: the plasma contains a large number of reactive oxygen ions, high-energy free groups and other components, easy to bacteria, mold and spores, viruses in the protein and nucleic acid material oxidation reaction and degeneration, so that all kinds of microorganisms die. 2. High-speed particle breakdown: After the sterilization experiment, the images of bacteria and virus particles subjected to plasma were observed by electron microscopy. They were riddled with holes, which was caused by the breakdown and etching effect produced by electrons and ions with high kinetic energy. 3, the role of uv: in the process of excitation hydrogen peroxide to form plasma, accompanied by part of the uv generation, this high-energy uv photons are absorbed by microorganisms or proteins in the virus, resulting in its molecular denaturation and inactivation. Application of plasma sterilization: The plasma sterilization technology applied in the medical field started from the United States in the 1980s. Menashi et al. first proposed that halogen gas plasma has a strong bactericidal effect and can be used for rapid sterilization of non-heat-resistant medical devices. The low-temperature plasma sterilization technology was patented in 1987. Starrad 100S hydrogen peroxide plasma sterilizer developed by Johnson & Johnson was approved by FDA in 1997. Minimally invasive surgery has been widely used in medical institutions in Europe, America, Japan and other developed countries. Since 2004, it has been popularized in China, and dozens of large medical units have begun to use it. Therefore, the use of low temperature plasma sterilization technology in China's medical field has been widely recognized. Characteristics of plasma sterilization: Environmental protection: Taking hydrogen peroxide, a common clinical medium, as the medium, it is stimulated by radio frequency electromagnetic field to form low-temperature plasma and complete sterilization. The product is a small amount of water vapor and oxygen, with no toxic residue and discharge, no damage to medical personnel and no pollution to the environment. Security: Automatic control contact plate, easy to operate, no need of high temperature and high pressure, and simple installation and debugging, safe to use. Room temperature: Sterilization temperature is 35℃ ~ 45℃, dry sterilization, no damage to instruments and articles, can prolong the service life of precious instruments. To save time: Sterilization cycle is short, it can be finished in 30 ~ 50 minutes time simple instrument sterilization, 50 ~ 70 minutes in complex sterilization equipment, after the completion of the operation can be used directly, without like to natural cooling placed after high temperature sterilization, also don't like epoxy ethane need 6 ~ 48 hours after low temperature sterilization ventilation diffusion, in order to reduce the residual ethylene oxide concentration. Wide scope of application: Low temperature sterilization is suitable for a variety of materials and instruments, especially for non-heat-resistant electronic instruments such as endoscope, electronic instrument, battery, wire, photographic camera and other articles sterilization treatment, has unique advantages.

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Plasma treatment of cellulose fibers

Plasma treatment of cellulose fibers

Plasma-treated cotton fiber is usually modified by plasma-treated surface treatment (PST), which can improve the adhesion and wettability of the fiber, improve the dyeing performance and increase the dyeing rate. Continuous low temperature plasma treatment device can desizing and refining cellulose fibers such as cotton. Plasma has been successfully used in the desizing process of open-width fabrics. The plasma can cut off the molecular bond of the fabric, increase the desizing rate, improve the dyeing performance, and shorten the pre-treatment washing process greatly, saving water, solar terms, economy and environmental protection. Hemp fiber has good mechanical and physical properties and health care properties. But because its orientation is high, the dyeing is poor, not easy to dye into dark, and the brightness is also poor. It was found that plasma treatment of ramie fiber, surface etching and introduction of hydrophilic groups could significantly increase the capillary effect, greatly improve the wettability of the fiber surface, improve the diffusion efficiency of dyes in the fiber and increase the adsorption capacity of the fiber to dyes. At the same time, the surface roughness is also increased, the surface area is increased, the weight loss rate is increased, and the grafting effect is improved after being treated by air plasma. It was found that the fabric's dry and wet rubbing fastness and washing fastness were improved when the flax was dyed with reactive dyes after grafting. The dyeing rate, color fastness and color depth of dyes have also been improved to a certain extent. In order to improve the printing effect of flax, semi-bleached and bleached linen fabrics were treated by plasma treatment, and the capillary effect of the fabrics was increased by 1 and 1.5 times respectively, and the whiteness of the raw and bleached fabrics samples was almost unchanged. Then the flax fabric is printed with reactive dye screen. The results show that the dyeing fastness of linen fabrics treated by plasma is high, and the fixing rate of reactive dyes on the fibers is greatly improved.

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The action mechanism of atmospheric pressure plasma cleaning machine on rubber and plastic products

The action mechanism of atmospheric pressure plasma cleaning machine on rubber and plastic products

In industrial applications, we found that some rubber and plastic parts will have difficulty in adhesion when surface connection is made. This is because polypropylene, PTFE and other rubber and plastic materials are non-polar, and the printing, adhesion and coating effects of these materials without surface treatment are not ideal. In some processes, some chemical agents are used to treat the surface of these rubber and plastic materials, which can change the bonding effect of materials. However, this method is not easy to grasp. Chemical agents themselves are toxic, very troublesome to operate, and the cost is high, and chemical agents also have an impact on the original excellent performance of rubber and plastic materials. Plasmas are used to treat the surface of these materials. Under the bombardment of high speed and high energy plasma, the structural surface of these materials is optimized, and an active layer is formed on the surface of these materials, so that rubber and plastic can be printed, bonded, coated and other operations. Plasmas technology is applied to the surface treatment of rubber and plastics, which is simple to operate, no harmful substances are produced before and after treatment, good treatment effect, high efficiency and low operating cost.

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The main function of low temperature plasma treatment

The main function of low temperature plasma treatment

Low temperature plasma treatment can effectively purify, activate, coarsene, etch and deposit the surface of the material.   1. Surface cleaning effect of PLASMA treatment: It can effectively remove organic pollutants and oxides from the surface of objects. Main features: wet cleaning method of cleaning, the surface would include residues, and the low temperature plasma surface treatment can achieve high cleanliness of surface, and the low temperature plasma on the surface of nanoscale materials only, will not change the original characteristics of the material, on the surface cleanliness requirements of high technology, is widely used instead of wet process. Treatment mechanism: it mainly relies on the "activation" of the active particles in the plasma to remove the surface stains. The gas is excited into a plasma state. Heavy particles collide with solid surfaces; Electrons react with active groups on the solid surface and break away from the surface as new gaseous substances. Plasma cleaning technology is characterized by both process base material type of object, can be processing, metal, semiconductor, oxides and most of the polymer materials, such as polypropylene, polyester, polyimide, poly (ethyl chloride, epoxy, and even can well with teflon etc, and can realize the overall and partial cleaning and complex structure.   2. Activation effect of PLASMA processing: Three groups -- C=O Carbonyl, -COOH Carboxyl, and −OH Hydroxyl -- are formed on the surface of an object by low temperature plasma treatment. These groups have stable hydrophilic function and have positive effects on bonding and coating. Main features: part can make the polymer surface active atoms, free radicals and unsaturated bond, the reactive group react with active particles in plasma generated new reactive group, thus increasing the surface energy, change the surface chemical properties, enhance the surface adhesion force and cohesive force, tension, including rubber, composite materials, glass, cloth, metal processing, such as involved in all walks of life.   3. Surface roughening and etching effects of PLASMA treatment: Corresponding different materials use the corresponding gas combination to form the gas equivalent ionization body with strong etching property to have chemical reaction and physical impact with the body on the material surface, so that the solid material on the body surface of the material is gasified to form gases such as CO, CO2, H2O, etc., so as to achieve the purpose of micro-etching. Main features: uniform etching, not changing the characteristics of the material matrix; It can effectively roughen the surface of the material and accurately control the amount of micro-corrosion.   4. PLASMA treatment of coating (deposition and grafting) : The plasma treatment process can also be used for micro-coating of materials. Equipped with two corresponding to different gas into plasma reaction chamber at the same time, two kinds of gas in the plasma environment stimulated and aggregation, produces new compounds deposited on the surface of material to form a new coating, using this kind of special effects of plasma treatment, can put the original is not easy to coating materials coated to the surface of the object, such as heart stents, artificial blood vessels to prevent blood clots, coating materials and scratch-resistant surface hydrophobic coating, etc. Main features: It can break the molecular chain on the surface of the material to generate new active groups such as free radicals and double bonds, followed by cross-linking and grafting reactions. The active gas will polymerize on the surface of the material to produce a layer of sediments, so as to achieve the purpose of surface modification. In fact, in the process of low temperature plasma to deal with things, all kinds of positive and negative ions in plasma, high-energy and high speed motion of the electron, the heavy particles can be processed material surface physical and chemical reaction, so the above mentioned four of low temperature plasma surface treatment (or five) are usually produced at the same time.

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