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Medical low-temperature plasma equipment needs to be wary of the electric field biological effect plasma gas temperature

Medical low-temperature plasma equipment needs to be wary of the electric field biological effect plasma gas temperature

Medical low-temperature plasma equipment needs to be wary of the electric field biological effect plasma gas temperature: Clinical plasma medicine involves a very complex biological and chemical basis. Whether it is for clinical applications or surface applications of non-clinical plasma cleaning equipment, the transmembrane potential of the electric field in the plasma of the low-temperature plasma equipment and the temperature of the plasma gas have a non-negligible effect, so let Cheng Fengzhi and you briefly analyze it. Transmembrane potential of plasma discharge electric field of low-temperature plasma equipment: When the organism is in direct contact with the plasma discharge zone, the biological effect of the electric field needs to be considered. Take the pulseless electric field as an example. Relatively speaking, the average electric field intensity in the plasma is relatively low, especially the voltage applied to the biological material is much smaller than the voltage in the plasma region. Therefore, it is usually not enough to significantly damage the cell structure. . At the same time, the conductivity of the cytoplasm and intercellular substance is one million times higher than that of the cell membrane, so current can only pass through the intercellular substance, and the cell membrane will form a barrier outside the cell to limit the pressure drop in the cytoplasm. But when an electric current passes outside the cell, the voltage flowing along the outer surface of the cell will form a gradient, resulting in a transmembrane potential. When the transmembrane potential is greater than a certain value, the cell structure will be destroyed. Since the amplitude of the transmembrane potential depends on the size, shape and direction of the cell, the destructive ability of different cells is different. Plasma temperature of low-temperature plasma equipment: The plasma used in general medicine generally refers to low-temperature plasma. Its gas temperature generally does not exceed 60°C. The temperature is slightly higher than body temperature. It will not cause burns. It can increase blood circulation, relax pores, and can treat certain diseases. It plays a role in auxiliary treatment. However, if the plasma is not uniform, it is very likely to cause the temperature in the local area to rise, which will cause local burns. The plasma uniformity is a problem that should be paid attention to in clinical medical applications. In addition, when the plasma temperature is 6°C higher than the normal temperature, that is, it exceeds 43°C, the kinetic energy of cell membrane molecules may exceed the hydration energy, leading to supramolecular polymerization and structural degeneration. Therefore, the kinetic energy damage of the cell membrane under high temperature determines the speed of cell necrosis. In short, the biological and chemical basis involved in clinical plasma medicine is very complicated. In addition to the aforementioned factors such as ultraviolet rays, charged particles, transmembrane potential, and temperature, in actual clinical applications, comprehensive consideration and careful use are required. . Chengfeng Zhizhi has focused on the research and development of low-temperature plasma equipment for 20 years. If you need to know the product details or have questions about the use of the equipment, please click on the Chengfeng Zhizhi online customer service, waiting for your call!

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Summary of the discovery and related research results of the bow single phenomenon of the micro plasma flame machine

Summary of the discovery and related research results of the bow single phenomenon of the micro plasma flame machine

Summary of the discovery and related research results of the bow single phenomenon of the micro plasma flame machine: Teschke and Kedzierski et al. published two papers in 2005, showing photos of helium-plasma jets taken with ICCD (such as enhanced charge-coupled sensors), and they discovered the phenomenon of "plasmon bow single". Since then, related research papers on the plasma bow monogram of the micro plasma flame machine have sprung up. The micro plasma flame machine is a technological process equipment that uses low-temperature plasma plasma to plasma the surface of the material. Since the discovery of plasma, there are many types of plasma research, including the plasma bow of the micro plasma flame machine. The discussion of the phenomenon. Lu and Laroussi found that the plasma bowing phenomenon has nothing to do with the specific electrode configuration. At the same time, in order to explain the plasma bowing phenomenon that occurs in the helium gas flow channel, they proposed a new photon preionization mechanism, but there are still many related problems to be solved. . Sands and others in 2008 found that the discharge of the jet area and the DBD area should be independent of each other. Through a series of specially designed experiments, Jiang et al. further confirmed this view and clearly showed that the plasma jet is essentially a corona discharge formed in the helium channel by the uneven electric field at the edge of the high-voltage electrode, although the experiment adopted The DBD structure is changed, but the jet is actually not related to DBD! To confirm this point, they showed devices with single-electrode and bare-electrode structures, which can generate completely similar plasma jets. In addition, their experiments also show that the discharge generated by a plasma jet device with a coaxial DBD structure such as Teschke should have three plasma regions. Chengfeng Zhizao has focused on the research and development of miniature plasma flame machines for 20 years. If you want to know more product details or have questions about the use of the equipment, please click on the Chengfeng Zhizao online customer service, waiting for your call!

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Plasma processing equipment manufacturers introduce the characteristics of key-operated plasma processing equipment

Plasma processing equipment manufacturers introduce the characteristics of key-operated plasma processing equipment

Plasma processing equipment manufacturers introduce the characteristics of key-operated plasma processing equipment: Key-press operation is actually an operation method of plasma processing equipment, which is also called manual operation. What are the characteristics of this operation method and what it generally contains, the plasma processing equipment manufacturer will introduce you to you below. At present, in the operation and control of plasma processing equipment, key operations and touch screen operations are common, and key operations are generally performed on small experimental equipment. Since PLC has never appeared and has never been used, almost all control systems are controlled by relays. This control method includes button and contact control. Push-button control mode means that the circuit of electric equipment is controlled by a manual controller; contact control mode is logically controlled by a relay, and its control object is both electric equipment and the relay's own coil. Relay control refers to the series and parallel connection of mechanical contact parts of electrical components to form a logic control circuit. Small-scale experimental low-pressure plasma processing equipment mostly adopts button control; the main electrical components controlled are: vacuum pump, RF power supply, buzzer with light, vacuum gauge, timer, float flowmeter, power regulator, green power supply indicator Lamp, self-locking vent button, self-locking gas one button, self-locking gas two buttons, self-locking high-frequency power button, self-locking vacuum pump self-locking button and total power knob switch. The disadvantages of this kind of small experimental plasma processing equipment are: because its contacts are connected by wires, it is more prone to failure, low reliability, and difficult to maintain. The relay components are all discrete components, which are large in size and inconvenient. Realize more complex logic control; its advantage is that the price is relatively cheap, the control objects can be one-to-one correspondence, the equipment operation is more intuitive, and the operation is more flexible. The above are the main control appliances and their advantages and disadvantages of the button-type small experimental low-voltage plasma treatment equipment. If you want to know the details of the product or have questions about the use of the equipment, please click on the online customer service of Chengfeng Zhizao, and Chengfeng Zhizao is waiting for you Call!

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The effect of plasma treatment on the softness of silk fibroin film and silk fibroin coated fabric

The effect of plasma treatment on the softness of silk fibroin film and silk fibroin coated fabric

The effect of plasma treatment on the softness of silk fibroin film and silk fibroin coated fabric: Plasma is a non-condensed system produced by ionizing gas under certain conditions. It is composed of neutral atoms or molecules, excited atoms or molecules, free radicals, electrons or negative ions, positive ions, and radiation photons. Low-temperature plasma has the characteristics of improving the surface properties of the polymer without changing the properties of the polymer body, which is very suitable for the modification of textile materials. The plasma etching plasma treatment technology for fiber structure analysis is an early application of plasma treatment in the textile industry and has become a mature technology. Another application is the modification of textile materials. The material undergoes surface modification, graft polymerization and plasma polymerization deposition, etc., to change the surface affinity (phobic) water of textile materials, increase adhesion, and improve printing and dyeing performance. It is even possible to introduce new groups on the surface of polymer materials to change the surface potential, surface energy level component, dispersion component, and surface microstructure, thereby improving the surface properties of polymer materials and making them biocompatible biomedical Material. The regenerated silk fibroin film formed at room temperature has a certain degree of flexibility and water solubility, but after a period of time, the film becomes brittle and affects its use. Low-temperature plasma treatment of recycled silk fibroin film and recycled silk fibroin-coated polyester-cotton fabric: After treatment with low-temperature plasma, the stiffness of the regenerated silk fibroin film is reduced, that is, the flexibility is improved. The higher the vacuum degree during treatment, the better the softening effect. This may be due to the fact that more ions are generated when molecules are ionized, and they recombine with the dehydrogenation free radicals on the surface of the regenerated silk fibroin film, which increases the wettability of the regenerated silk fibroin film, thereby improving the flexibility of the regenerated silk fibroin film. The greater the degree of vacuum, the better the softness of the silk fibroin-coated fabric after low-temperature plasma plasma treatment. This is consistent with the conclusions before and after the regenerated silk fibroin film treatment, but the low-temperature plasma softening effect of the silk fibroin-coated fabric is not as good as the treatment effect. The regenerated silk fibroin film has a good low-temperature plasma softness treatment effect, and the softness effect of the O2 treatment silk fibroin coating fabric is better than the H2O treatment effect. After the recycled silk fibroin coating and polyester-cotton fabric are treated with low-temperature plasma plasma, their chemical cross-linking has a certain change, which can further enhance the comfort of the polyester-cotton fabric silk fibroin coating without adding any crosslinking agent. Practicality of finishing. After low-temperature plasma treatment, the regenerated silk fibroin film has a significantly higher water solubility than that without low-temperature plasma treatment, while the effect of treatment under O2 and H2O conditions is not much different. This may be due to the fact that new hydrophilic functional groups formed on the surface of the regenerated silk fibroin membrane and the chain structure of macromolecules have undergone certain changes after the treatment with low-temperature plasma plasma, which improves the hydrophilicity and water solubility. The vacuum condition has a greater influence on the effect of the regenerated silk fibroin film and the regenerated silk fibroin coating. The softness of the fabric is treated. The greater the vacuum, the better the softening effect. The H2O low-temperature plasma treatment has a better effect on the softness of the regenerated silk fibroin film, while the O2 low-temperature plasma treatment has a better effect on the softness of the regenerated silk fibroin-coated polyester-cotton fabric. After low-temperature plasma treatment, the water solubility of the regenerated silk fibroin film is obviously increased, but it has little effect on the hot water loss rate of the silk fibroin-coated fabric.

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How does the brand quality of Japanese plasma cleaners compare with domestic ones?

How does the brand quality of Japanese plasma cleaners compare with domestic ones?

How does the brand quality of Japanese plasma cleaners compare with domestic ones? There are many brands of plasma cleaners on the market, including imported brands and domestic brands. Japanese plasma cleaner brands are also imported brands. Recently, I have received feedback that the quality of the equipment of the Japanese plasma cleaner brand is good, and there are already domestic production. No need to import. Is that right? Chengfeng Zhizhi plasma technology will explain it for you. In terms of plasma cleaning machine related technology, after the introduction of technology, digestion and experience precipitation, the Japanese plasma cleaning machine brand can indeed be comparable to European and American brands in the basic research of plasma, and some Japanese plasma cleaning machine brands are in process and The detail control is indeed very good, the equipment quality is stable, and the structure and appearance design also reflect the humanized design. Some Japanese plasma cleaner brands have also achieved good results in industrial and market applications in the fields of semiconductors, panels, and new materials with Japanese characteristics. Therefore, it is reasonable to say that the quality of the Japanese plasma cleaner brand equipment is good, but it is also necessary to look for some more reliable representative brands, such as YAMATO, SEKISUI, Panasonic and so on. The high price is a factor that affects the market share of Japanese plasma cleaners in the domestic and Japanese markets. It is not yet clearly known that plasma cleaners of Sino-Japanese joint venture brands have appeared in China, and Japanese plasma cleaners are generally imported with original packaging, so the corresponding delivery time and maintenance cycle are relatively long. Chengfeng Zhizao has focused on plasma equipment for 20 years. If you are interested in plasma cleaning machines or want to know more, please click Chengfeng Zhizao's online customer service consultation. Chengfeng Zhizao is waiting for your call!

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The processing application of high molecular material and metal material of medical plasma surface treatment machine

The processing application of high molecular material and metal material of medical plasma surface treatment machine

The processing application of high molecular material and metal material of medical plasma surface treatment machine: The medical plasma surface treatment machine is a commonly used medical polymer material and metal material surface cleaning and modification treatment equipment, and the special medical plasma surface treatment machine can often achieve better treatment results. The medical plasma surface treatment machine What are the advantages? Let's take a look at them together. In the medical equipment industry, the production and manufacturing process of many products cannot be separated from the plasma surface treatment process. At present, the medical plasma surface treatment machine is mainly used for the treatment of medical polymer materials and metal materials to remove the surface of medical polymer materials and metal materials. In addition, the medical plasma surface treatment machine can also modify the surface of the treated material to change its hydrophilicity or hydrophobicity. At the same time, the surface grafting treatment method of the medical plasma cleaning machine can be used in Groups such as hydroxyl, carboxyl, and amino are formed on the surface of the processed material. At present, there are relatively few special plasma surface treatment machines for medical use in my country, and a large part of them are made from ordinary treatment machines. What is the reason? In fact, there are two factors. One is that the original medical device industry does not have high requirements for plasma surface treatment, and the other is that plasma cleaning machine suppliers do not understand the actual application scenarios and production processes of medical products, and it is difficult to make targeted Stronger dedicated processing equipment. With the improvement of industry standards and requirements, many medical products have higher and higher requirements for plasma surface treatment. Various industries have begun to look for more targeted medical plasma surface treatment machines. If you are also looking for medical-specific plasma surface treatment equipment , Welcome to inquire at any time. Chengfeng Zhizhi has been committed to the development of various plasma surface treatment equipment and the application of plasma surface treatment technology for 20 years. It has accumulated rich experience in surface modification of medical polymer materials and surface film synthesis. The relevant samples of the instrument were processed.

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