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You are familiar with the use of plasma in these fields and the future of low temperature plasma
You are familiar with the use of plasma in these fields and the future of low temperature plasma: With the development of technology, it is not just something we are usually familiar with. Plasma has a wide range of applications in science, economy, medicine and other fields, and plasma is one of them. Plasma, like cryogenics, is a term for a state of matter. There are three types of substances: solid, liquid, and gas. Except for solid, liquid, and gas, other substances are now called plasma. If the gas is heated to an ultra-high pressure, it produces a mixture of various ions, electrons, and free radicals, known as plasma. Its variety and composition are complex, including various polymer plastics, metals, semiconductors, rubber, silicone, leather, circuit boards, etc. Such materials have poor surface properties and are prone to problems such as coating, bonding, and printing. In order to facilitate painting and printing, manual grinding was generally used in the past, which was not efficient and seriously affected the beauty of the interior. It will also open the glue. The cost of using hot melt glue and other high-grade glues is high, and it will also affect the reputation of the entire car brand. However, the application of plasma has been widely known. The plasma cleaning machine for automobile interiors produced by plasma treatment technology can improve the resistance to printing, abrasion, bonding and other issues. What are the car interiors? , steering wheel, instrument panel, seat system, air bag, seat belt, carpet, GPS, DVD, sensors, antenna, etc. The product has the characteristics of strong adaptability, energy saving, low energy consumption, strong equipment matching ability, safety and reliability. Therefore, it has been widely used in various aspects and is well-known by people from all walks of life. In industrial production, plasmas are used to create new materials with exceptionally superior properties. Materials such as semiconductors can also be used to sharpen knives, molds, etc., and sometimes to refine metals. Indeed, in industry, plasma technology is also used to make various tools. In the field of chemistry, plasmas are used to develop new chemicals and chemical processes. Sometimes, plasma technology is also used to treat hazardous waste. In the medical field, plasma is used for a variety of safe and adaptable procedures. It can not only ensure the effective operation of the operation, but also reduce the worry of the patient and reduce the risk of the scalpel. In addition, plasma equipment can also be used to make low-temperature plasma equipment, such as low-temperature plasma organic waste gas purifiers. Low temperature plasma technology can be used in various fields, not only in chemical and industrial fields, but also in a wide range of fields. The emergence of low-temperature plasma has solved many problems faced by people and made great contributions to people's lives.
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Research on the reduction of bacterial adhesion and modification of aluminum sheets after plasma treatment
Research on the reduction of bacterial adhesion and modification of aluminum sheets after plasma treatment: During the production, packaging and transportation of medicines and food, bacteria in the environment can easily adhere to their surfaces to form a biofilm, causing contamination of medicines and reducing the shelf life of food production, thus affecting people's health. A step in biofilm formation is the adsorption of macromolecules such as bacteria and proteins. If the surface material can prevent bacteria from sticking, it can prevent the formation of biofilms. Polyethylene glycol (PEG) organic compounds are potential preservatives that can effectively prevent bacteria and proteins from adhering. Aluminum is a common packaging material widely used in the food and pharmaceutical industries. If polyethylene glycol is used to deposit a reinforcing film on the surface of the aluminum sheet, it can prevent bacteria from adhering. Surface modification methods include chemical and physical methods. The chemical method is a wet method, and its technological operation is relatively complicated, and chemical reagents that pollute the human body and the environment are required. Low-temperature plasma technology opens up a new avenue for surface modification of metal biomaterials. It is a dry process with the advantages of easy operation and control, no pollution to the environment, and has received more and more attention in the fields of food and biomedicine. The PEG-like structure was grafted on the surface of the aluminum sheet by low-temperature plasma to form a thin film, and a large number of -CH-CH-O bonds were mainly accumulated on the surface; Greatly reduces bacterial adhesion. Plasma-induced reactive species (such as free radicals, etc.) provide a mechanism for the recombination of surface di(ethylene glycol) methyl ether molecular fragments for reaction. The free radicals fall into the newly generated macromolecular network and can initiate a vigorous electronically excited in situ oxidation reaction. The ATR-FTIR analysis of the aluminum sheet macromolecular layer structure after plasma treatment shows that there is a strong absorption peak at 1583.07 cm, which is the characteristic absorption peak of the CO bond in the PEG structure, indicating that the deposited surface layer is PEG-like. structure. The absorption peak at 1780.21cm indicates that there is a C-O bond, which shows that a partial cross-linking reaction occurs while forming a PEG-like structure. Compared with before modification, the bacterial adhesion of aluminum sheet after plasma treatment is greatly reduced after plasma treatment. This is because PEG structure is produced by cross-linking on the surface, and the PEG molecular chain has high flexibility. It can reduce the configurational freedom of macromolecular chains such as bacteria, and thus have the ability to resist bacterial adhesion. The surface morphology of the bacteria biofilm adsorbed on the aluminum sheet before modification and the sample analysis of the surface adsorption on the aluminum sheet after modification can be known that the surface of the modified aluminum sheet can effectively resist bacterial adsorption after plasma modification. The elemental composition and chemical bond state on the surface of the aluminum sheet changed significantly after plasma treatment, and CO, OCO and O-CO-O bonds were formed on the surface layer. This indicates that plasma-induced reactive species (such as free radicals, etc.) provide a mechanism for the recombination of surface bis(ethylene glycol) methyl ether molecular fragments, which is different from non-oxidative reactions in which the formed free radicals fall into newly generated macromolecules. In the network, a vigorous electronically excited in-situ oxidation reaction can be initiated. The PEG-like structure deposited on the surface of the aluminum sheet can greatly reduce bacterial adhesion. Compared with before modification, bacterial adhesion is reduced by more than 80%, which has important application prospects in the food industry and medical transplantation.
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Research status of biomedical metal material modification application by low temperature plasma technology
Research status of biomedical metal material modification application by low temperature plasma technology: Due to the development of basic industries and high-tech products, people's demand for high-quality, high-efficiency surface modification and coating technology is developing in depth. Breakthrough progress has been made in surface modification and coating process simulation and performance prediction. As an important part of the development of new metal biomaterials, low temperature plasma technology surface modification and coating technology has penetrated into traditional industries and high-tech industrial sectors, and further promotes the development of surface functionalized coating technology according to application needs. In the low temperature plasma surface modification technology, it is an important research direction to design the material surface according to the application requirements, tailor the material surface performance parameters to meet the special requirements, and further realize the prediction of the structure and properties of the surface covering layer. Different types of Plasma Chemical Vapor Deposition (PCVD) is a challenging research topic that is being carried out by research institutes and universities. Computer simulation studies on Plasma Chemical Vapor Deposition (PCVD) and other surface modification methods have been carried out abroad. , The PCVD process was simulated, and the macro and micro multi-level models were used to simulate and predict the various properties of the plasma process and coating and the bonding force of the substrate; Simulation allows for better control and optimization of the process. For half a century of the 20th century, the ideas and methods of physics dominated the discovery and preparation of new materials. Since the 1950s, the ideas and methods of molecular biology have been rapidly recognized as the guiding principles for the growth, discovery and crystallization of new materials. & Since most biological reactions occur at the interface and surface of materials, biologists introduce surface science into biology, which plays a decisive role in the development of biomedical materials, biomedical materials and devices have the ability to save human lives, huge The commercial value of it has strongly stimulated a lot of research. Since low-temperature plasma technology has unique advantages and potentials in the growth of biomedical materials and the fabrication of biomedical devices, if the two are organically combined, it is possible to realize the revolutionary development of biomedical technology in the 21st century. In the future, with the development of plasma surface modification technology at home and abroad, combined with the needs and status of biomedical engineering, we will focus on the development of a number of advanced and applicable key technologies for surface functionalization of metal materials, including low-temperature plasma vapor deposition technology and equipment. , Numerical simulation of surface coating process and quality, and research and development of optimal control. What we mean by biomedical materials refers to materials that are compatible with living organisms involved in biomedical research and medical practice, including materials for the manufacture of artificial organs, biosensing materials, external surface materials for in vivo implantation devices, and certain materials. The materials used in some medical devices, the surface reaction of these materials is mainly controlled by the surface chemistry and molecular structure of the materials, which requires biomedical materials not only to have certain physical properties such as strength and elasticity, but also to have a biocompatible surface. nature. It is quite difficult to design a new material with both the required physical properties and the required surface properties. Since the response of organisms to the material surface mainly depends on the chemical properties and molecular structure of the material surface, it is possible to choose existing materials. Surface modification of the material with the required body properties to make it have the required biocompatibility, so as to achieve the above purpose, for example, some macromolecular polymers have similar mechanical properties to human organs, but are not biocompatible Therefore, surface modification is required to fix specific functional groups on the surface to achieve the purpose of being compatible with living organisms. In conclusion, low-temperature plasma technology is being applied by many scientists in the research of surface modification and surface film synthesis of metal biomaterials due to its unique advantages, but most of these studies are still in the development or experimental stage. Low-temperature plasma surface modification technology, with the deepening of plasma theoretical research and the resolution of process problems, will definitely improve the biologi
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Changes of surface activity of nylon dental materials treated with plasma surface processor
Changes of surface activity of nylon dental materials treated with plasma surface processor: With the continuous improvement of nylon processing technology and modification technology, the application scope of plasma surface treatment has expanded rapidly, and the application requirements of nylon surface cleaning, material protection, enhancing adhesion or dyeing are increasing. However, the structure of various nylon materials is different, and the corresponding surface properties are also very different. In order to adapt to various applications, plasma surface treatment technology came into being. Titanium is an inert metal material with low biological activity and is easily wrapped in a fibrous membrane after implantation in the jawbone. The lack of initiative results in long osseointegration times, poor initial stability, and low long-term success rates. However, pure titanium has low hardness, poor fatigue strength and wear resistance. During the use of titanium implants, failures such as loosening of abutment screws, pitting corrosion, wear and corrosion of connecting threads occur, which seriously affect the reliability and service life of the implant system. . Plasma surface treatment provides adhesion to nylon surfaces and improves surface hydrophilicity and wettability by introducing polar organic functional groups to the surface. Clean surface and surface wettability play an important role in the color combination of the two surfaces. Surface wetness depends on the surface condition of the nylon itself and all nylon dyed materials. The surface tension of these dyed materials can be reached to the required value by efficient treatment with low temperature plasma. After the plasma equipment was treated and modified, the water droplets of the contact angle tester slipped down from the top of the implant, and the angle value could not be determined and was close to 0. Existing experiments have proved that under the corresponding process gas and other conditions, the super-hydrophilic change on the surface of dental implant titanium implants by plasma treatment has important medical significance. Before processing: the contact angle of the nylon tube is 78.16°; After the plasma cleaning machine, the contact angle of the nylon tube is close to 0°; Result: Plasma treatment by plasma surface processor can significantly change the surface activity of nylon material, and can significantly improve its surface energy and hydrophilicity, and enhance the dyeing ability. Due to the unique physical and chemical properties of the surface material and its successful application in finishing, lubrication, bonding, foaming, waterproofing and biomedical materials, its wetting performance is one of the important properties of the surface material, which mainly depends on Microgeometry and chemical composition of surface materials. The adsorption and proliferation experiments of osteoblasts were carried out using a plasma surface processor, and the results showed that their surface oxidation activity was better than that of heat treatment. The superhydrophobic surface was prepared by the method of molecular self-assembly, and the contact angle can reach more than 130 degrees. The conversion and control of sample superhydrophilicity and superhydrophobicity can be realized by plasma treatment with a plasma surface processor.
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Comparison of plasma-modified MH-Ni polypropylene battery separator hollow cathode before and after remote treatment:
Comparison of plasma-modified MH-Ni polypropylene battery separator hollow cathode before and after remote treatment: Polypropylene has high chemical stability and good mechanical properties, small specific gravity and specific resistance, excellent air permeability, low price, low energy consumption, no pollution, and is an ideal battery separator substrate. However, because there are no hydrophilic groups in the macromolecular structure of polypropylene, the crystallinity is high, the fiber cross section is round, the structure is dense, and the lack of micropores and gaps, its hydrophilicity is extremely poor. In order to improve the wettability of polypropylene fiber separator to electrolyte, it can be treated by wetting method and surface modification method. In the wetting method, the hydrophilic group cannot be fixed on the surface of the separator material in a chemically bonded state, so the life span is short. Plasma surface modification is mainly to improve its hydrophilicity by introducing functional hydrophilic groups or depositing a hydrophilic polymer film on the surface of the polypropylene battery separator, so as to improve the alkali absorption performance of the separator. At present, most of them are directly processed by low temperature plasma discharge. However, the traditional low-temperature plasma discharge direct treatment method has disadvantages such as low ion concentration, low treatment efficiency, surface contamination and thermal stress, and its application scope is limited. The plasma concentration of radio frequency discharge can be increased by an order of magnitude, resulting in a higher polymerization rate. At the same time, the plasma is to place the experimental sample away from the plasma treatment area. The energy of the active particles in the far area is moderate. The plasma polymerization reaction has mild reaction, few side reactions, strong controllability, and polymerization grafting. The membrane structure is easy to control and so on. Plasma equipment modified the separator for alkaline secondary battery-MH-Ni battery, and the plasma treatment conditions affected the performance of polypropylene separator. The high alkali absorption of the diaphragm can effectively reduce the electrochemical polarization and concentration polarization of the electrode reaction, fully reduce the internal resistance of the battery during the charging and discharging process, make the discharge reaction more sufficient and complete, and improve the utilization rate of active materials. With the increase of air flow, the activated plasma state increases, and more acrylic acid is grafted faster. Therefore, the alkali absorption rate and alkali absorption rate of the polypropylene diaphragm are gradually increased. However, after reaching a certain flow rate, under the condition that the discharge power remains unchanged, the increase of the gas flow rate leads to an excessively high gas density, which makes the energy of a single charged particle smaller, and at the same time causes more energy loss in the collision between particles. , affecting the effect of acrylic polymer deposition. After plasma cleaning, the alkali absorption rate of the diaphragm decreases correspondingly, but the alkali absorption rate does not decrease much. This may be part of the buildup on the treated battery separator, the polyacrylic film is not firmly bonded to the polypropylene. After cleaning, this part of the polyacrylic acid film fell off, resulting in a great reduction in the rate of alkali absorption. The alkali absorption rate experiment was carried out after the treated diaphragm was fully infiltrated. Even if the alkali absorption rate of the diaphragm decreased, the total alkali absorption rate did not change much. The comparison between untreated polypropylene battery separator and plasma treatment shows that hydrophilic carboxyl groups are introduced on the surface of polypropylene fiber after plasma treatment. The untreated battery separator is relatively smooth, while the treated separator fibers are distributed with a sheet-like polyacrylic acid film, and the surface becomes rough. In addition, the characteristic peaks of polypropylene are still well preserved, indicating that although the separator has been treated, its own characteristics have not been affected.
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Plasma etching machine technology PTFE plasma hole film interface adhesion performance Surface treatmen
Plasma etching machine technology PTFE plasma hole film interface adhesion performance Surface treatment:         PTFE microporous membrane has stable chemical properties, high temperature resistance, corrosion resistance, excellent water resistance and oleophobicity, and has good filtration performance for high temperature, high humidity, high corrosion and machine fluids in special gases, and can be widely used. It is used in dust removal and filtration in metallurgy, chemical industry, coal, cement and other industries. It is a film material of high temperature resistant composite filter material. However, its extremely low surface activity and outstanding non-stick properties make it difficult to compound with substrates, thus limiting its application. Plasma etching machine is also known as plasma etching machine, plasma plane etching machine, plasma surface treatment instrument, plasma cleaning system, etc. Plasma etching machine technology is a common form of dry etching. The principle is that the gas exposed to the electron region forms plasma, generates plasma and releases gas composed of high-energy electrons to form plasma or ions. When bulk atoms are accelerated by an electric field, the force released is sufficient to cling to the material or etch the surface, combining it with the surface driving force. To a certain extent, plasma cleaning is actually a minor phenomenon in the plasma etching process. Dry etching processing equipment includes reaction chamber, power supply, vacuum and other parts. The workpiece is sent to the reaction chamber, and the gases are introduced into the plasma and exchanged. The plasma etching process is essentially an active plasma process. Recently, a shelf form has appeared in the reaction chamber, which the user can move flexibly to configure the appropriate plasma etching method: reactive plasma (RIE), downstream plasma (downstream) and direct plasma (directionplasma) . The power of plasma surface treatment of plasma etching machine technology is not as large as possible. At lower power, the shear strength of the treated film increases with the increase of power, and the strength gradually decreases after reaching the peak value. Inductively Coupled Plasma Etching (ICPE) is a combination of chemical and physical processes. Its basic principle is: under low pressure, the ICP radio frequency power supply is output to the annular coupling coil, and through the coupling glow discharge, the mixed etching gas generates high-density plasma through the coupling glow discharge. The surface of the substrate is bombarded, the chemical bonds of the semiconductor material in the pattern area of ​​the substrate are broken, and volatile substances are generated with the etching gas, which separates the gas from the substrate and is evacuated from the vacuum tube. Under the same conditions, oxygen plasma treatment is more effective than nitrogen plasma treatment. If etching is required, as well as removal of dirt, scum, surface treatment, plasma polymerization, plasma ashing or any other etching application after etching, we can produce safe and reliable plasma etcher technology according to customer requirements. Our company has both traditional plasma etching system and reactive ion etching system, can produce series products, and can also customize special systems for customers. We can provide fast/high quality etch that provides the required uniformity. With the prolongation of the treatment time, the contact angle of the film surface decreased, but within a certain period of time, the contact angle hardly changed. Plasma treatment can be used for a variety of substrates, and complex geometries can also be plasma activated, plasma cleaned, plasma coated, etc. Plasma processing has a low thermal and mechanical load, so low-pressure plasma can also process sensitive materials. The above results show that the use of plasma surface treatment of PTFE has better viscosity, and it is necessary to continuously adjust various treatment parameters to obtain a good treatment process. CRF Chengfengzhi plasma cleaning machine is simple to operate, can set multiple experimental parameters, and can also Store a variety of process parameters, which is very helpful for exploring process parameters. Typical applications of plasma etcher technology are: semiconductor/integrated circuits; gallium nitride; aluminum nitride/gallium nitride; gallium arsenide/aluminum gallium arsenide; gallium arsenide; /InAlAs); silicon; silicon germanium; silicon silicide ceramics (Si3N4); silicon hydrogen bromide; zinc selenide (ZnSe); aluminum; chromium; platinum; molybdenum; niobium; indium; tungsten; indium tin oxide; indium titanium lead acid; plastic/polymer material; polytetrafluoroethylene (PTFE); polyoxymethylene (POM); polybenzimidazole (PBI); polyetheretherketone (PEEK); polyamide (PFA); polyamide (PFA) ; Polyamide etc.
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