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Plasma processor plasma surface treatment for automotive interior headlights applications

Plasma processor plasma surface treatment for automotive interior headlights applications

Plasma processor plasma surface treatment for automotive interior headlights applications: The plasma treatment machine has a good cleaning effect on surface cleaning, and can remove the release agent on the surface, and its activation process can ensure the quality of the subsequent bonding process and coating process. For coating treatment , the surface properties of the composites can be further improved. Using this plasma technology, materials can be efficiently surface pretreated according to specific process requirements. Plasma is a collection of positively charged positive particles and negative particles (including positive ions, negative ions, electrons, free radicals and various active groups, etc.) Body is the fourth state-plasma state in which matter exists in addition to solid, liquid and gaseous states. Application of plasma processor in automobile interior manufacturing process: The car interior mainly includes the following subsystems: dashboard system, sub-dashboard system, door trim, roof, seat, pillar protection system, other cab interior systems, cab air circulation system, trunk assembly, engine compartment Control systems, carpets, seat belts, airbags, steering wheels and interior lighting, car interior acoustic systems. Due to the complex composition of automotive interior materials, including various polymers, metals, semiconductors, rubber, leather, circuit boards, etc. This leads to major problems in coating, bonding and printing. To facilitate coating and printing, manual sanding has been widely used in the past. Due to the way, the efficiency is low, which seriously affects the external beauty of the interior. Using hot melt glue and other adhesives to prevent the glue from opening the water will only prevent the glue from being opened to a certain extent. It cost a lot of money, and once it was degummed, it still had complaints or returns. The energy of the particles in the plasma produced by the plasma processor is usually about several to tens of electron volts, which is greater than the bond energy of the polymer material (several to ten electron volts), which can completely break the chemical bonds of organic molecules and form new ones. But it is much lower than high-energy radiation, it only involves the surface of the material, there is no wear, and it does not affect the structure of the material itself.   Plasma processor plasma surface treatment headlights: Almost all headlamps are glued to meet leak-proof requirements between the lens and the housing. If cold glue works properly by virtue of the combination of art and its own price advantage, it can get cheap and high quality glue bond. The pretreatment of the low temperature plasma surface makes this possible, and the atmospheric pressure low temperature plasma processor makes this process possible.

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Under the action of plasma plasma, the supported lanthanide oxide catalyst CO2 oxidizes CH4 to C2

Under the action of plasma plasma, the supported lanthanide oxide catalyst CO2 oxidizes CH4 to C2

Under the action of plasma plasma, the supported lanthanide oxide catalyst CO2 oxidizes CH4 to C2: The supported lanthanide oxide catalysts have good OCM reactivity. In the catalytically activated CO2 oxidation of CH4 to C2 hydrocarbons, La2O3/ZnO gave a C2 hydrocarbon selectivity of up to 97% (the methane conversion rate was 2.1% at 850 °C). The study by Maraffee et al. , the La2O3-based catalyst gave higher CH4 conversion (27.4%) and C2 hydrocarbon yield (10%). Therefore, this study focused on the catalytic effect of five supported lanthanide oxide catalysts, La, Ce, Pr, Sm, and Nd, on the reaction of CO2 oxidation of CH4 to C2 hydrocarbons under the action of plasma. Under a certain plasma effect, the supported lanthanide oxide catalysts all showed a certain ability to activate CH4 and CO2. As a result of the combined action of lanthanide catalyst and plasma, the conversion rate of CH4 is 24%~36%; the conversion rate of carbon dioxide is 18%~22%. The experimental results show that under the action of plasma, different lanthanide catalysts have great differences in the activation ability of CH4, while the ability to activate carbon dioxide is similar (the CO2 conversion rate under the action of pure plasma is similar to 20%). According to the experimental fact that lanthanide catalysts have certain catalytic activity under pure catalytic conditions. It can be speculated that under the action of plasma, the catalyst can participate in the C-H bond cleavage process of methane through surface reaction. For CH4 activation: There are differences in the ability of lanthanide catalysts and plasma to activate CH through the joint action. The order of their joint action ability is as follows: Nd203/Y-Al203 > CeO2/Y-Al203 > Sm203/Y-Al203 > Pr2O11/Y -Al203 > La2O3/Y-Al2O3. According to the C2 hydrocarbon selectivity, the order of catalyst activity is: La2O3/Y-Al2O3>CeO2/Y-Al203≈Pr2O11/Y-Al203>Sm203/Y-Al2O3>Nd203/Y-Al2O3. Comparing the results of C2 hydrocarbon selectivity with the effect of lanthanide catalysts on C2 hydrocarbon yield, the order of the two is basically the same. The performance is higher than 70%, so the C2 hydrocarbon yield is higher than other rare earth catalysts. This is consistent with the high C2 hydrocarbon selectivity of La2O3 catalyst under pure catalytic conditions. However, lanthanide catalysts have little effect on the distribution of C2 hydrocarbon products, and C2H2 is the main C2 hydrocarbon product.

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Plasma plasma and lanthanide catalytic supported transition metal oxide catalyst activity

Plasma plasma and lanthanide catalytic supported transition metal oxide catalyst activity

Plasma plasma and lanthanide catalytic supported transition metal oxide catalyst activity: Under the combined action of plasma plasma and lanthanide catalyst, the yield of C2 hydrocarbon and CO has a certain relationship with the atomic number of lanthanide catalyst, that is, with the increase of element atomic number, the yield of C hydrocarbon gradually decreases, and the yield of CO gradually increases. This shows that under the plasma atmosphere, the lanthanide catalysts have differences in adsorption selectivity and adsorption capacity for various free radicals in the system. The La2O3/Y-Al2O3 catalyst adsorbs methyl radicals and promotes the generation of C2 hydrocarbons; different from the La203/Y-Al2O3 catalyst, the Nd2O3/Y-Al2O3 catalyst tends to adsorb oxygen-containing radicals, and the methyl radicals on the catalyst surface Easily oxidized by oxygen-containing free radicals to form CO. It is worth noting that in the reaction of CO2 oxidation of CH4 to C2 hydrocarbons, CeO2/Y-Al203 combined with plasma showed better catalytic activity, which was similar to CeO2/Y-Al203 in the catalytic methane oxidation coupling reaction. The roles of sm2O2/Y-Al2O3 are obviously different. It is generally believed that CeO2/Y-Al2O3 is an excellent catalyst for the complete oxidation of methane to CO, which is not conducive to the formation of C2 hydrocarbons. Similarly, although Sm2O3/Y-Al2O3 is an excellent catalyst for the oxidative coupling reaction of methane, but in plasma plasma Its catalytic activity is not obvious in bulk atmosphere. This shows that the co-action mechanism of plasma and catalyst is not the same as that of pure catalysis, so it is necessary to further study the co-action mechanism of plasma plasma and catalyst.

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Comparison of catalytic activity activation methods for plasma supported catalysts

Comparison of catalytic activity activation methods for plasma supported catalysts

Comparison of catalytic activity activation methods for plasma supported catalysts: In the reaction of CO2 oxidation of CH4 to C2 hydrocarbons, the currently used methods for activating reactants methane and carbon dioxide include catalytic activation method and plasma plasma activation method, and the plasma catalytic activation method is introduced. For the convenience of comparison, the results of CO2 oxidation of CH4 to C2 hydrocarbons under three activation conditions are listed in Table 4-3. It can be seen from Table 4-3 that in the catalytic activation method, when the reaction temperature is as high as 1100K, methane can Converted to C2 hydrocarbons, although the selectivity of C2 hydrocarbons is high, the conversion rate of methane is very low, so the yield of C2 hydrocarbons is only 2%. Plasma activation can significantly improve the methane conversion rate. When the plasma plasma injection power is 30W, the methane conversion rate reaches 26.5%, due to the lack of choice between the reactions between free radicals in the plasma plasma space and the decomposition effect of the plasma on the products. , resulting in a low C2 hydrocarbon selectivity (47.9%), and with the increase of plasma injection power, the C2 hydrocarbon selectivity decreases rapidly, so it is difficult to improve the C2 hydrocarbon yield under a certain plasma plasma injection power. In the reaction of plasma catalytic activation of CO2 oxidation of CH4 to C2 hydrocarbons, the activation of plasma can fully activate methane and improve the conversion rate of methane. The surface is selectively adsorbed and compounded to generate C2 hydrocarbon products, which improves the C2 hydrocarbon selectivity and C2 hydrocarbon yield. Because it is still difficult to study the mechanism of the plasma-catalytic activation reaction using the existing detection instruments, the research on this reaction is still in the initial stage of speculation and exploration based on the experimental results. Comparing the three activation methods, plasma catalytic activation of CO2 oxidation of CH4 to C2 hydrocarbons should have application potential and is worthy of further study. Table 4-3 Comparison of activation methods (unit: %) Activation method Xcog XcH Sc Yc Yc, H Yco Plasma 20.2 26.5 47.9 12.7 1.6 33.2 Catalysis 3.7 2.1 97.0 2.0 >2.0 Plasma-Catalysis 22.0 24.9 72.7 18.1 13.8 28.6

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Vacuum plasma surface cleaning machine circuit board plasma treatment changes in chemical and physica

Vacuum plasma surface cleaning machine circuit board plasma treatment changes in chemical and physica

Vacuum plasma surface cleaning machine circuit board plasma treatment changes in chemical and physical: The operation process, timeliness and treatment plan of the processing line of the vacuum plasma surface cleaning machine, the high-energy plasma is generated by the radio frequency power supply under a certain pressure, and then the surface of the processed surface object is bombarded by the plasma to produce a microscopic surface peeling effect. In the vacuum chamber, a high-energy plasma is generated by the radio frequency power supply under a certain pressure, and then the surface of the machined object is bombarded by the plasma to produce a microscopic surface peeling effect (the peeling depth can be adjusted by adjusting the plasma bombardment time. , The role of plasma is nano-scale, so it will not damage the processing object) to achieve the purpose of operation. Vacuum plasma surface cleaning machine reactive plasma means that the active particles in the plasma can chemically react with the surface of the refractory material, thereby introducing a large number of polar groups, making the surface of the material change from non-polar to polar, and increasing the surface tension , the bondability is enhanced. Reactive plasma active gases are mainly O2, H2, NH3, CO2, H20, S02, HVH20, air, glycerol vapor and ethanol vapor. Under the action of the plasma, some active atoms, free radicals and unsaturated bonds appear on the surface of the refractory plastic. These active groups will react with the active particles in the plasma to generate new active groups. However, materials with active groups will be affected by the action of oxygen or the movement of molecular segments, causing the surface active groups to disappear. Before the circuit board (FPC/PCB) is shipped, the surface will be cleaned with a vacuum plasma surface cleaning machine plasma. Under normal circumstances, downstream customers of circuit boards will conduct incoming inspections of products, such as Wire Bonding Test, Wire Pull Test, etc. When the surface is not cleaned, there are often some contaminations that lead to testing. Fail. In order to avoid the above problems, surface plasma cleaning before shipment has become a trend in this era of increasing pursuit of quality. Because the plasma treatment of vacuum plasma surface cleaning machine is manifested in chemical changes and physical changes. In the physical change, the surface of the material is modified and roughened, and the number of protrusions on the surface after etching increases, increasing the surface area. If exposed to polluted air, mixed with dust, oil, impurities, the surface energy will gradually decrease. During chemical changes, oxygen-containing polar groups, such as hydroxyl and carboxyl groups, are introduced during plasma treatment. These active molecules are time-sensitive and are prone to chemical changes with other substances. The surface energy retention time after treatment is not easy to determine. Different gases, power, processing time, and placement environment will have an impact on the surface aging of the material. The proven aging of FPC products after cleaning is: 1 week (confirmed with contact angle measurement data, the smaller the contact angle value, the higher the dyne value).

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Preliminary discussion on the co-action mechanism of plasma and catalyst

Preliminary discussion on the co-action mechanism of plasma and catalyst

Preliminary discussion on the co-action mechanism of plasma and catalyst: The research results of the reaction of CO2 oxidation of CH4 to C2 hydrocarbons under the action of plasma plasma and various catalysts show that the co-action mechanism of plasma plasma and catalyst is different from that of pure plasma or ordinary catalytic activation. The oxidation of CO2 under the action of pure plasma plasma The CH4 conversion reaction is a free radical process, and the selectivity of the target product is low; the catalyst does not show catalytic activity below 80 °C. When a catalyst is introduced into the plasma, the catalyst adsorbs reactants through adsorption, and free radicals participate in the surface reaction, which affects the conversion rate of reactants and the yield of products; plasma plasma is introduced into the catalytic process, and the plasma provides the necessary energy for catalyst activation. , and will also have direct and indirect effects on reactant adsorption, surface reactions, and product desorption processes. According to the experimental results, the co-action of the plasma and the catalyst is manifested in the following aspects. (1) The plasma plasma continuously activates the catalyst. There are a large number of high-energy particles in the plasma, and these high-energy particles mainly transfer energy to the catalyst through collision and activate the catalyst. Therefore, even at lower experimental temperatures (below 100 °C), the catalysts studied in the experiments still show high catalytic activity. (2) The catalyst has a certain influence on the plasma discharge state. Different catalyst types have different influences. Marafee et al. studied the effect of metal oxide catalysts with OH groups on the oxidative coupling reaction of methane in corona discharge plasma, and the results showed that the catalysts with OH groups could enhance the gas discharge effect and lead to methane conversion and C2 hydrocarbon yield increased significantly. The research shows that the basicity of the catalyst is beneficial to the formation of C2 hydrocarbons. (3) The catalyst has an activating effect on the reactants. The catalyst activates the reactant by adsorption, and promotes the conversion of the reactant. The study on the activation and conversion mechanism of methane under catalysis shows that the C-H bond of methane adsorbed on the active center of the catalyst is activated due to the filling of electrons by the anti-bond σ* orbital electrons, and the C-H bond energy is reduced. In the joint action of the plasma and the catalyst, the catalyst activated by the plasma may activate the CH bond and CO bond of the reactant in the same way, and the high-energy electrons with lower energy in the plasma interact with the activated reactant to promote the conversion of the reactant. . It is worth pointing out that under the same plasma plasma injection power, the conversion rate of reactants under the joint action of some catalysts and plasma is lower than that of pure plasma experiments under the same conditions, which may be due to the fact that catalyst activation consumes more energy. (4) Another function of the catalyst may be to selectively adsorb the active species, promote the reaction of the active species, remove the excess energy of the new material to prevent its decomposition, improve the product yield, and reduce the formation of carbon deposition. Therefore, the joint action of plasma and catalyst is a potential enhanced reaction process and a brand-new research direction. Once a breakthrough is made, it is bound to promote the development of the emerging interdisciplinary field of plasma. Thank you for your attention and support to Chengfeng Zhizao atmospheric plasma cleaning machine. The company is committed to providing users with comprehensive surface performance treatment and testing solutions, and independently develops, produces and sells plasma surface treatment equipment. Dedicated to the research of surface properties for many years, adhere to the tenet of continuous innovation, and professional quality service, it has won the unanimous recognition of users at home and abroad.

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