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Five major differences between commercial and industrial use of vacuum plasma cleaners

Five major differences between commercial and industrial use of vacuum plasma cleaners

Five major differences between commercial and industrial use of vacuum plasma cleaners: Commercial vacuum plasma cleaners are very different from industrial plasma cleaners. So, where are these differences reflected? This article introduces the difference between vacuum plasma cleaners in commercial and industrial applications. 1. Under the same pressure and flow rate, the continuous effective working time of commercial equipment is much shorter than that of industrial equipment. 2. Commercial vacuum pump heads are generally made of copper or aluminum. However, the industrial pump head material must be made of alloy steel to meet the requirements. 3. The high rated working pressure for commercial use is far less than the high rated working pressure for industrial use. 4. Under the same pressure and flow rate, the pump head and the overall volume of a commercial vacuum plasma cleaner are much smaller than those of the industry. 5. Under the same pressure and flow conditions, the life span of commercial plasma cleaning equipment is much shorter than that of industrial plasma cleaning equipment.        The above is a summary of the information about the difference between commercial and industrial use of vacuum plasma cleaners compiled by the editor using time. I hope it can be helpful to friends in need. Thank you for your support and take time out of your busy schedule to read this article. Please pay attention to the official WeChat account of Chengfeng Zhizhi, and I will continue to update it for you in the future.

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Study on the modification of wood by plasma treatment of plasma plasma cleaner

Study on the modification of wood by plasma treatment of plasma plasma cleaner

Study on the modification of wood by plasma treatment of plasma plasma cleaner: As a material that has been used by humans for a long time, wood materials have many advantages such as easy to obtain materials, recyclable and environmentally friendly, high strength-to-weight ratio, convenient processing, and wide application. So far, they still play a great role. However, with the improvement of people's living standards and years of logging and utilization, logs with excellent wood properties are becoming scarce. In addition, the material properties of wood have given way to ecological properties. Traditional wood must be functional, intelligent, and fusion modified to meet the requirements of the new era. The use of artificial fast-growing forests to finely process wood has become a trend in the wood industry. In this context, research on wood modification has become an inevitable hot spot. However, chemical modification methods such as wood acetylation and wood-plastic composite materials have complex processes and a single applicable material category, and chemicals will generate environmental pressure, which limits the use of chemical modification methods. Physical modification methods such as mechanical sanding and thermal modification have a weaker degree of wood modification, and there is no qualitative change in wood properties. Therefore, plasma technology has entered people's field of vision. Plasma is generally a gas mixture composed of ground state and excited state electrons, ions and neutral particles. Wood is mainly modified by cold plasma. The modification of wood by plasma treatment is only limited to the surface of the material, without changing the nature of the wood itself, and to a large extent retains the advantages of the wood itself. This method has the advantages of short processing time, simple process, high efficiency, non-polluting, dry method, and wide application range. It is a research field that integrates physics, chemistry, materials science and many other disciplines with development potential. The effect of plasma modified wood is mainly reflected in three aspects: wetting characteristics, liquid transport characteristics and adhesion characteristics. The wettability of wood is directly related to its glue and characteristics, as well as its ability to prevent moisture and mildew. It is an intuitive feature of wood surface modification. Plasma treatment of wood can not only improve wettability, but also reduce wettability. The hydrophobic and hydrophilic surface produced depends on the gas used in the plasma treatment process. The use of methane, tetrafluoroethylene, etc. as the treatment gas increases the contact angle of the wood surface and forms a hydrophobic surface; while using oxygen and acrylic acid as the treatment gas, the wood is changed from a hydrophobic surface to a hydrophilic surface, but the nature of the wood itself is not Variety. After the plasma treatment, the depth of the wood adhesive to reach the surface of the wood body after penetration by transportation is increased. Plasma plasma cleaning machine plasma treatment of wood has other modification effects. Plasma is used to eliminate the weak boundary layer, homogenize the wood surface and increase wettability. Compared with laser ablation, the effect of plasma modification is better. Plasma polymerization coating technology plasmaizes polymerized organic gases through electrical effects, and these active particles undergo an addition reaction to form a polymerized film on the surface of the wood, thereby achieving functional characteristics such as moisture resistance, fire resistance, and mildew resistance. Plasma bombards the wood surface, causing etching, forming microscopic "gullies", increasing the roughness of the wood surface, creating a liquid transport channel, improving the wettability and permeability of the liquid, and forming a glue nail effect during gluing. Improve gluing performance. Plasma plasma cleaning machine plasma can promote graft copolymerization on the surface of wood, improve surface activity, and create conditions for subsequent chemical reactions. The performance is that ionic treatment can affect the acidity and alkalinity of the surface of the carrier, so that the surface layer can form a new metastable phase. .

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Plasma cleaning machine cleans polymer plays a role in surface reorganization, cleaning, modification, etc.

Plasma cleaning machine cleans polymer plays a role in surface reorganization, cleaning, modification, etc.

Plasma cleaning machine cleans polymer plays a role in surface reorganization, cleaning, modification, etc.: Plasma cleaning machine is a brand-new high-tech. Using plasma cleaning machine can achieve effects that cannot be achieved by conventional cleaning methods. Plasma is a state of matter, also called the fourth state. Add enough energy to the gas to make it ionize and become a plasma state. The active components of plasma include: ions, electrons, active radicals, excited states (metastable states) of nuclides, photons, and so on. Plasma cleaners play an extremely important role in cleaning polymers: 1. Reorganization of the polymer surface: The inert gas used in the cleaning process of the plasma cleaner will destroy the chemical bonds on the polymer surface, thereby generating free functional groups on the polymer surface. The free functional groups on the surface of the polymer recombine to form the original polymer structure, and can also be combined with the free functional groups of the adjacent same polymer chain, or with the free functional groups of adjacent different polymer chains. Polymer surface reorganization can increase surface hardness and improve surface resistance. 2. Cleaning the surface of polymer materials: The plasma action bombards the surface of the material with high-energy electrons and ions to mechanically remove the dirt layer. Plasma cleaner cleaning can remove the dirt layer, unwanted polymer surface coating and weak boundary layer that may exist in some processed polymers. 3. Surface modification of polymer: The plasma destroys the chemical bonds on the polymer surface, resulting in the formation of free functional groups on the polymer surface. According to the chemical properties of the plasma process gas, these surface free functional groups combine with atoms or chemical groups in the plasma to form a new polymer functional group, replacing the original surface polymer. Polymer surface modification can change the chemical properties of the material surface without changing the overall properties of the material; 4. Polymer surface coating: Plasma coating is to form a thin plasma film on the surface of the material substrate through the polymerization of the process gas. If the synthesis gas used is composed of composite molecules such as methane, tetrafluoride, carbon, etc., they will break in the plasma state to form free functional monomers, which are connected on the polymer surface and reconstituted into functional monomers, thereby Polymer surface coating. The polymer surface coating can significantly change the permeability and friction properties of the polymer surface.

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The bonding and other processes can only be implemented after the metal plastic activation treatment of the oxygen plasma cleaner

The bonding and other processes can only be implemented after the metal plastic activation treatment of the oxygen plasma cleaner

The bonding and other processes can only be implemented after the metal plastic activation treatment of the oxygen plasma cleaner: The application of oxygen plasma cleaner technology in organic matter processing has great advantages, and its advantages are as follows. (1) Dry process, energy saving, no pollution, meeting energy saving and environmental protection requirements; (2) Short time and high efficiency; (3) There are no strict requirements on the shape to be processed, and it is universal; (4) It can handle grooves of various shapes, and the product appearance has good uniformity; (5) The reaction environment temperature is low; (6) The effect of improving the appearance is only a few hundred nanometers, and the functions of all materials are not affected. 1. Metal activation treatment of oxygen plasma cleaner: It may be that the metal has been activated, but the activation of the metal is very unstable, so the effective time is short. If the metal is activated, the next processing (gluing, painting...) process must be completed within a few minutes, if it is a low-temperature plasma surface treatment, because the surface will quickly bond with the dirt in the surrounding air. After the metal is activated, processes such as soldering or bonding can be implemented. 2. Plastic activation treatment of oxygen plasma cleaner: Plastics such as polyethylene or polyethylene are all non-polar structures. This means that these plastics must be pre-treated before they can be painted and bonded. Generally used as process gas, dry, oil-free compressed air. Immerse the processed and unprocessed workpieces in water (polar solution), the temperature and activation effect of the oxygen plasma cleaner is better. For untreated parts, droplets of normal shape are formed. The processed parts of the processed parts are completely wetted by water. 3 Oxygen plasma cleaner activates glass and ceramics: The performance of glass bottles and ceramic bottles is similar to that of metal bottles. Plasma and active treatment have a short validity period. Generally, compressed air is used as the process gas. The skills of processing the surface of low-temperature plasma select low-temperature plasma for data surface modification. 1. Enhance the adhesion of the metal surface: After the metal special oxygen plasma cleaning machine is processed, the surface morphology changes microscopically. After the oxygen plasma cleaning machine treats the metal surface, the surface bonding force can reach 62 dynes or more, which can meet various bonding and spraying , Printing and other processes, and at the same time achieve the effect of eliminating static electricity. 2. Improve the corrosion resistance of the metal surface: The existing iron and steel alloys undergo plasma treatment to improve impact resistance and corrosion resistance. Since ions in the four directions are injected into the sample at the same time, there is no visual field limitation, so it can handle samples with more complicated shapes. Using an oxygen plasma cleaner to coat polyparaxylylene on the metal surface, and the aluminum surface to coat aluminum alloy, these technologies are often used to protect the metal surface of spacecraft. 3. Improve the hardness and wear resistance of metals: The early application research of plasma immersion technology mainly used nitrogen plasma to process the surface morphology of metal materials. Through the formation of TiN and CrN super hardened layers, the wear resistance of the sample surface has been significantly improved.

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The low-temperature plasma has enough energy to break the chemical bonds in the biomass feedstock

The low-temperature plasma has enough energy to break the chemical bonds in the biomass feedstock

The low-temperature plasma has enough energy to break the chemical bonds in the biomass feedstock: With the in-depth research on biomass refining all over the world, new bio-refining technologies continue to emerge. Low-temperature plasma technology has become one of the promising biomass refining technologies with its unique chemical activity and high energy. Plasma is usually juxtaposed with solid, liquid, and gaseous states, and is called the fourth state of matter. According to the energy, temperature and ion density of its system, plasma is usually divided into high-temperature plasma and low-temperature plasma. High-temperature plasma is mainly used in controllable nuclear fusion in the energy field, while low-temperature plasma is more closely related to modern industry. Low-temperature plasma refers to a plasma with high electron temperature but low system temperature. The temperature of electrons can reach more than 10,000K, while the temperature of heavy particles such as ions and atoms can be as low as 300-500K. The huge temperature difference between electrons and heavy particles has two effects. On the one hand, the electrons have enough energy to excite, ionize and dissociate the reactant molecules. On the other hand, the system can be kept at a low temperature or even close to room temperature. Under the action of the high-voltage electric field between the electrodes, a large number of high-energy particles such as electrons, ions, molecules, neutral atoms, excited atoms, photons and free radicals are produced, and the total positive and negative charges of the particles are equal, and they are macroscopically charged. sex. The highly active particles enriched in the low-temperature plasma space have the following characteristics: an active atmosphere, the highly active particles have high kinetic energy and internal energy under the action of an electric field, which provide activation energy for chemical reactions, and have the possibility of chemical reactions sex. The production process of bio-based products is the process of breaking and depolymerizing the chemical bonds in the biomass matrix and the formation-polymerization process of new chemical bonds under the action of physics and chemistry. Since the energy of most active particles in low-temperature plasma is higher than the bond energy of common chemical bonds in biomass raw materials, low-temperature plasma has enough energy to break the chemical bonds in biomass raw materials, and has the ability to polymerize with the biomass matrix. The possibility of depolymerization reaction has broad application prospects in the field of biomass refining. The low-temperature plasma biomass refining mechanism provides a new way for efficient and clean biomass refining. Biomass resources are rich in components and complex in structure. During the evolution process, a series of natural barriers against degradation have been formed. The use of biological, physical and chemical methods to change or remove the barriers of its structure and composition is the focus of research on efficient refining of biomass resources. High-energy particles generated by oxygen or air low-temperature plasma are used to impact textile cotton fibers, replacing conventional chemical wet processing procedures. Through the introduction of the waxy and unique groups on the surface of textile fibers or fabrics, the molecules attached to the fiber surface are oxidized and decomposed, and the molecular chains are cut to generate carbon dioxide and water to be removed, and some low molecules are oxidized. , It forms substances containing -OH, -COOH and other easily soluble groups in water to be removed, and relieves the natural barrier formed by the stratum corneum of textile fibers and pectin. Similarly, low-temperature plasma can be used to remove the keratin and pectin and other natural anti-degradation barriers on the surface of the straw to increase its permeability by 10-100 times, which will help the enzymatic conversion of biomass resources such as straw. In addition, the low-temperature plasma has a low temperature, will not cause thermal damage to the bacterial species, and the concentration of new particles is high, which can produce obvious mutagenic effects. Therefore, low-temperature plasma is also used in biomass pretreatment/refining process microorganisms Breeding and transformation. The low-temperature plasma technology does not use strong corrosive chemicals such as acids and alkalis. The reaction process is pollution-free, harmless to humans, and corrosive to equipment. The entire process and its products are environmentally friendly. The low-temperature plasma modification technology of biomass has many advantages such as less pollution, no damage to the performance of the matrix, high efficiency, and far lower energy requirements than thermochemical reactions. It is widely used in the field of biomass modification, such as wood modification and texti

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Study on the experimental nucleation of plasma chemical vapor deposition diamond film

Study on the experimental nucleation of plasma chemical vapor deposition diamond film

Study on the experimental nucleation of plasma chemical vapor deposition diamond film: The diamond film prepared by this technology is a technology with the ability of plasma chemical vapor accumulation. Because thin-film diamond is of great significance in super-hard maintenance coatings, light windows, heat sink data, microelectronics, etc., when mankind has mastered the preparation technology of diamond thin films, especially the preparation technology of single crystal diamond thin films, they rely on The history of data will quickly move from the age of silicon materials to the age of diamonds. However, the mechanism of plasma chemical vapor deposition of diamond films is still unclear, especially for heteroepitaxial single crystal diamond films. The difficulty lies in the fact that the low-temperature plasma is in a thermally unbalanced state, and the reaction gas used is also polyatomic molecules. , The reaction system is complex and lacks basic data support. However, after more than 20 years of theoretical and experimental research, people have not only developed many plasma chemical vapor deposition techniques for preparing diamond films, but also have a certain understanding of the factors affecting the growth of diamond films through the analysis and summary of experimental data. For the growth of polycrystalline diamond film, nucleation is the key, and there are many factors that affect nucleation, including plasma conditions, matrix data, and temperature. Using plasma chemical vapor deposition of diamond film, we must first understand the nucleation process of diamond, which is generally divided into two stages: carbon-containing groups reach the surface of the substrate, and then dispersed into the interior of the substrate; the second stage is the carbon reaching the surface of the substrate The nucleation and growth of atoms on the surface of the matrix centered on defects, diamond crystals, etc.; therefore, the factors that determine the diamond nucleation include: 1. Matrix data: because the nucleation depends on the saturation of the surface of the matrix and the amount of carbon reaching the core The critical concentration, therefore, the carbon dispersion coefficient of the matrix data has an important influence on nucleation. The larger the dispersion coefficient, the less likely it is to reach the critical concentration required for nucleation. It is very difficult for metal substrates such as iron, nickel, titanium to directly nucleate on this type of data; and for data with a lower carbon dispersion coefficient , Such as tungsten, silicon, etc., diamonds can quickly nucleate. 2. Surface grinding: Generally, the nucleation of diamond can be advanced by grinding the surface with diamond powder. Grinding using SiC, c-BN, Al2O3 and other data can also promote the formation of nucleation. There are two main mechanisms for grinding to promote nucleation formation: one is that after grinding, the diamond particles remain on the surface of the substrate and act as a seed; the other is that grinding can produce many tiny defects on the surface of the substrate. These defects are favorable directions for spontaneous nucleation. The closer the lattice point constant of the grinding data is to diamond, the better the effect of enhancing nucleation. Therefore, the general grinding data are diamond powder prepared by the high temperature and high pressure method. 3. Plasma parameters: In the early stage of diamond nucleation, due to the dispersion of carbon to the substrate, an interface layer was formed on the surface of the substrate. Therefore, the study pointed out that plasma parameters also have an important effect on the interface layer. For example, when a diamond film is deposited on the surface of a silicon substrate At this time, the methane concentration has a direct effect on the formation of the SiC interface layer. 4. Bias enhanced nucleation: In microwave plasma chemical vapor deposition, the substrate is generally negatively biased, that is to say, the potential of the substrate is related to the low potential of the plasma. The effect of the negative bias is to increase the ion concentration on the substrate surface. When the bias voltage is too high, because too many ions sputter the outer layer of the substrate and the precursor nuclei, a nucleation is formed. Therefore, when the bias voltage is enhanced, the size of the bias voltage is more appropriate.

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