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Effect of low temperature plasma treatment on bond strength of fiber piles

Effect of low temperature plasma treatment on bond strength of fiber piles

Influence of low temperature plasma treatment on bond strength of fiber piles: With the continuous improvement of people's living standard and the attention to oral health, more and more attention has been paid to the repair of crown and root injuries. As a country with a large population, China has many patients with tooth defects. During repair, repair materials with sufficient deformation resistance and certain binding strength are required. Fiber piles treated by low temperature plasma At present, there are many materials used for dental repair. Dentists can choose the specific repair materials suitable for patients according to the characteristics of patients. Due to the advantages of corrosion resistance, good biocompatibility, good aesthetics and simple clinical operation, the hard resin base pad after restoration has good mechanical distribution, accord with the normal physiological structure, and has a good protective effect on the remaining tooth tissue, thus reducing the possibility of root fracture after restoration to a certain extent. The clinical application and popularization of fiber piles have attracted the attention of many scholars because of their excellent biocompatibility, biomechanical properties and corrosion resistance. The success of fiber post restoration mainly depends on the bond strength of fiber post - cement - dentin composite interlayer. Since the 1990s, fiber piles have become an effective method to repair residual roots and crowns. Due to the smooth surface of fiber pile, it is difficult to combine with resin cement effectively, resulting in insufficient bond strength and often difficult to achieve satisfactory clinical effect. Physical or chemical treatment can increase the bonding strength of the fiber pile surface. Sandblasting and silane coupling agents are commonly used in clinical practice. However, these methods are often accompanied by some adverse reactions, such as the integrity of the fiber column corrosion, performance reduction. The low temperature plasma treatment on the surface of the fiber column can improve the bonding strength without changing the physical and chemical properties of the raw materials. In clinical practice, the use of fiber post prosthesis can achieve good clinical effect. However, reports of failed fiber pile restoration are not uncommon. Due to the insufficient bond strength of the repair material, it brings serious troubles to the patients and even affects their quality of life. Retention effect of fiber post is an important factor affecting the effect of dental restoration. The bond strength of fiber pile is mainly determined by the interface between resin cement and dentin and the interface between fiber pile and resin cement. Inadequate bonding strength is a common cause of repair failure. The fiber on the surface of the fiber pile is smooth and smooth, and it is difficult to produce with resin material. Resin is a polymer crosslinked polymer material, it is difficult to carry out chemical bonding. In order to improve the bond strength of fiber piles, researchers have done a lot of work, among which the effective technology is plasma surface treatment. After plasma treatment, the mechanical activity of epoxy resin on the surface of fiber pile was improved. After plasma treatment at low temperature, the chemical affinity between the surface of polymer material and the adhesive material of acrylic resin can be increased without damaging the fiber integrity of the surface. Compared with other surface treatment methods, low-temperature plasma treatment is relatively mild, does not cause serious damage to the original physical and chemical structure and properties of the surface, and significantly increases the bonding strength. The surface of the fiber pile was bombarded with plasma, and the results showed that the bonding strength was improved obviously. By introducing oxygen-containing groups on the surface of fiber piles, the chemical bonding effect on the surface of fiber piles can be increased, and the chemical reactions on the surface active components such as oxygen free radicals and resin materials can be made, thus the bonding strength of fiber piles can be improved.

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Plasma equipment manufacturer Chengfeng Zhizao professional research and development design of plasma technology

Plasma equipment manufacturer Chengfeng Zhizao professional research and development design of plasma technology

Plasma equipment manufacturer Chengfeng Zhizao professional research and development design of plasma technology The source manufacturer of plasma equipment, Chengfeng Zhizhao, specializes in developing and designing plasma surface treatment technology, which will improve the manufacturing quality of glass and the bonding quality after production in glass manufacturing industry. Adhesion and wetting problems can be solved in many industrial fields by plasma surface treatment technology. Plasma surface treatment and activation technology is a new treatment method which is both economical and environmental protection. It also greatly increases the wetting and adhesion of the glass substrate. Before the actual coating, painting, and bonding process, it was considered to be a highly efficient method of surface activation. Non-viscous polymer surface activation also has an effect. Plasma surface treatment equipment has flexibility, can help enterprises in the production process to improve reliable performance guarantee, to achieve the purpose of hydrophilic activation modification. Second, because the operation cost is low, so it is considered to be environmental protection process. Plasma Equipment Manufacturer Plasma treatment of plasma equipment to improve adhesion and surface cleaning, Chengfeng Intelligent Manufacturing provides automatic plasma equipment cleaning, detection of the overall solution. Components preparation is an important step before bonding, painting, painting and painting. Plasma treatment provides an economical way to clean and activate the surface of the part to be further machined. Plasma equipment surface treatment improves the wettability and adhesion of inks, glues and coatings on different surfaces. If you need to understand the technology behind the surface treatment technology, we recommend you to visit our company, participate in the treatment process, familiar with the working principle of plasma. The company's plasma treatment equipment and products also provide surface treatment and a green solution to clean complex surfaces before the next treatment. This method is especially suitable for the contours of complex surfaces that cannot be treated by conventional processing mechanisms. Plasma surface treatment equipment is used for the long-term bonding of plastic and metal, and has a variety of customized solutions for products. Plasma treatment has been used in all industrial production processes, we have many years of experience in providing customers with suitable surface treatment equipment. Plasma technology equipment is used before the material can be painted, printed or bonded. Plasma treatment can be used for surface treatment of various materials before coating, printing or bonding. So this can also be called surface pretreatment. Plasma treatment technology can remove impurities on the surface of the material and facilitate further processing. If left untreated, materials such as plastics easily lose any kind of print or coating on their surfaces because of their glossy texture. Plastics are made of polypropylene, which has the same polarity and therefore do not stick easily. After activation by plasma surface treatment, the adhesive force of the plastic has changed remarkably.

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Describes the plasma surface treatment process equipment

Describes the plasma surface treatment process equipment

Describes the plasma surface treatment process equipment Plasma, the fourth state of matter, is a unique treatment medium used to treat and roughen surfaces. Plasma surface treatment equipment has unique advantages, the characteristics of its interaction with the surface and the scope of application are as follows. Plasma surface treatment equipment has the advantages of surface treatment, flexibility and consistency of process, low cost, easy to use, user and environment safety. Depending on the type of processing gas and material used, the plasmon surfaces interact differently. A variety of plasma treatment gases can be used for the removal, oxidation, activation, crosslinking and deposition of chemical and mechanical pollutants. Plasma surface treatment equipment technology What plasma is, how it is produced and maintained, and how it interacts with surfaces. A large number of ions, excited molecules, free radicals and other active particles in the plasma act on the surface of the solid sample, which can not only remove the original pollutants and impurities on the surface, but also play a corrosive role, making the sample surface rough, forming many small depressions, and increasing the specific surface area of the sample. Improve the wettability of solid surfaces. Plasma forming uses capacitive plates or magnetic induction to generate an RF oscillating electric field in a gas region. The combination of electric field acceleration of the electron and elastic scattering of neutral atoms or field lines at low enough pressure heats the electron. When electrons in a neutral gas gain kinetic energy beyond the ionization threshold, the neutral collision of electrons leads to further ionization, resulting in the creation of additional free electrons, which are heated in turn. Plasma surface interactions: The energy of the electrons and ions in the plasma surface treatment equipment process is sufficient to ionize neutral atoms, separate the molecules, form reactive free radicals, cause the atoms or molecules to produce excited states, and locally heat the surface. Depending on the process gas and process parameters, the plasma can make free radicals react with the surface through mechanical action, the dynamic migration of electrons and ions and the corrosive effect of the surface, as well as the chemical reaction work. In general, plasmas can act on and clean surfaces through several mechanisms: etching, activation, deposition, crosslinking, and grafting plasma surfaces. Plasma surface treatment equipment advantages: Effect on the surface of the material: plasma treatment only affects the near surface of the material and has no effect on the blocky properties of the material. Unlike many wet cleaning processes, plasma cleaning does not leave organic residues; Under the right conditions, plasma cleaning can completely remove contaminants, resulting in an "atomically clean" surface. Unlike aqueous solutions, plasmas are not limited by surface tension and can clean rough, porous, or uneven surfaces. Plasma treatment at near ambient temperature can reduce the damage to thermosensitive materials. Plasma surface treatment equipment process has a certain flexibility and consistency, depending on the process gas and use, plasma treatment can be used for surface characteristics of cleaning, activation, cleaning and modification changes. Plasmas react with a variety of materials, so they can also handle components made of different materials. 1. Low price/easy to use 2, high processing efficiency, short processing time, no drying stage, low energy consumption. 3. Plasma treatment can help avoid process losses due to heat loss and solvent damage. 4, Plasma processing is easier to use and maintain than chemical or mechanical processing, and does not require complex chemical analysis or maintenance. Plasma treatment usually does not require solvents, nor does it require continuous purchase and processing of solvents. 6. Plasma plasma technology is adopted to improve the safety of users and the environment. 7. Plasma technology can eliminate the safety risk of workers' contact with dangerous chemicals. 8. Plasma plasma treatment is carried out under conditions close to the ambient temperature, which will not cause safety problems. 9, can handle complex geometry of three-dimensional parts.

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Effect of Oxygen Plasma Surface Treatment on ITO Films Improving the Electrical Properties of ITO Films

Effect of Oxygen Plasma Surface Treatment on ITO Films Improving the Electrical Properties of ITO Films

Effect of Oxygen Plasma Surface Treatment on ITO Films Improving the Electrical Properties of ITO Films Effect of Oxygen Plasma Surface Treatment on ITO Thin Films As an important transparent semiconductor material, indium tin oxide (ITO) has not only stable chemical properties, but also excellent light transmittance and electrical conductivity, so it has been widely used in the optoelectronics industry. The conduction band of ITO is mainly composed of In and 5S orbital of Sn, while the valence band is dominated by 2p orbital of oxygen. The oxygen vacancy and Sn-substituted doped atoms constitute the donor level and affect the carrier concentration In the conduction band. The highly degenerate N-type semiconductor of ITO is formed due to the generation of oxygen vacancy and Sn-doped substitution In the film during deposition. Its Fermi level, Er, is above EC at the bottom of the conduction band, thus having a high carrier concentration and a low resistivity. Effect of oxygen plasma surface treatment on ITO films In addition, ITO has a wide optical band gap, so it has a high transmittance to both visible and near-infrared light. Due to the above unique properties, ITO thin films are widely used in photovoltaic batteries, electroluminescence, liquid crystal display, sensors, lasers and other optoelectronic devices. As is known to all, ITO belongs to non-stoichiometry, compounds, deposition conditions, post-treatment technology and cleaning methods and other factors will significantly affect its surface properties, especially the surface morphology and chemical composition of its surface, thus affecting the interface characteristics between ITO film and organic layer, and further affecting the optoelectronic performance of devices. Therefore, before commercial ITO conductive glass is used to fabricate devices, it is usually necessary to adopt appropriate methods to treat the surface of ITO film, and improve the performance of devices by improving its surface electrical properties and surface morphology. Up to now, the methods used for surface modification of ITO can be divided into two types: dry treatment and wet treatment. Among them, the dry treatment of oxygen plasma surface treatment usually uses various ionized gas plasma to clean the surface of ITO to remove its surface pollution and improve its surface morphology. Wet treatment uses different organic solvents to bond new groups on the surface of ITO, so as to achieve the purpose of modifying its surface. The surface of ITO anode was modified by oxygen plasma treatment. The changes of chemical composition, crystal structure, light transmittance and block resistance of ITO film before and after treatment showed that the surface of untreated ITO contained residual pollutants related to carbon element. After plasma treatment, the acromion strength of ITO was significantly reduced. This indicates that oxygen plasma surface treatment can effectively remove organic pollutants on ITO surface. Plasma treatment can not only reduce the carbon concentration on ITO surface, but also increase the oxygen concentration on ITO surface, and improve the chemical composition on ITO surface, which is very important for improving the work function of ITO and the performance of devices. In addition, a four-probe method was used to measure the block resistance of ITO samples before and after treatment. It is found that plasma treatment can reduce the block resistance of ITO electrode, which is beneficial to the improvement of device performance. In conclusion, under the condition that the crystal structure and optical transmittance of ITO films are almost unchanged, oxygen plasma surface treatment not only reduces the block resistance of ITO, but also improves the chemical composition of ITO surface and the work function of ITO, thus optimizing the physical properties of ITO anode. Plasma surface modification is beneficial to improve the energy conversion efficiency of organic solar cells, improve the photovoltaic performance of the devices, and play an important role in improving the short circuit current, filling factor and energy conversion efficiency of organic solar cells.

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Plasma surface modification equipment to treat different materials before pretreatment to improve adhesion

Plasma surface modification equipment to treat different materials before pretreatment to improve adhesion

Plasma surface modification equipment to treat different materials before pretreatment to improve adhesion In different materials before the plasma surface modification equipment processing to improve adhesion, its cleaning principle is through the surface adhesion or adsorption of functional groups, to adapt to the specific application of the surface characteristics of the polymer surface cleaning activation, improve the ability of bonding. Plasma surface modification equipment for plasma activation circuit board, epoxy resin, PTFE printed circuit board etching and decontamination, gold contact deoxidization, O-ring plasma cleaning, PWIS cleaning, etc. There are strict requirements for the use of many O-rings and sealing elements, and the assemblies are free of any paint wetting damaging substances (such as silicone). This method can be used for coating, coating process and coating application, and also for some printed circuit boards which perform important wire welding tasks. Plasma surface modification equipment Elastic materials contain a large number of coating wetting damage substances, the traditional wetting process can not remove these substances. Softeners and release agents can be transferred from the body of the elastomer to the surface, causing quality problems. Plasma surface modification equipment Plasma cleaning processes are used to ensure compliance with standards in these components. Plasma cleaning eliminates the barrier between paint and coating. It can remove silicone contaminants and increase the bonding force of various plastics. Improve the wettability of all polymer materials surface, plasma treatment printing adhesion processing of three-dimensional shape surface activation, for different materials such as metal, ceramic, glass printing textile plasma treatment can improve the performance of many industries, including semiconductors, medical, IC integrated circuits and so on. Plasma surface modification equipment improves ink adhesion on difficult surfaces such as polypropylene (PP), polyethylene (PE), polycarbonate (PC) and polyamide (PA). These surfaces can be wetting in seconds through machining and in-line plasma treatment, giving uniform, solvent-free inks with good printing adhesion. Plasma processing is an inherent cold processing technology, which is also suitable for thermal sensitive materials. Plasma treatment is especially suitable for different materials complex three-dimensional shape of metal, glass, ceramic surface activation, such as ionization treatment can achieve ink adhesion performance is good, improve the surface adhesion. Plasma surface modification equipment principle: 1. The surface is treated by attachment or adsorption of functional groups to suit specific applications. 2, improve the polymer surface microstructure, improve adhesion. 3, plasma polymerization deposition of polymer layer, surface corrosion. 4. Plasma activates the grafted functional polymers or end groups on the surface. 5. Surface prepared for subsequent processing, such as thin film deposition or molecular adsorption. 6, improve the surface cover and spread of the coating, improve the adhesion and wettability between the two surfaces. 7. Wetting makes the surface hydrophilic. 8. Change the surface characteristics without affecting the material.

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Working principle of plasma spray gun plasma spray gun spraying range decryption

Working principle of plasma spray gun plasma spray gun spraying range decryption

Working principle of plasma spray gun plasma spray gun spraying range decryption Working principle of plasma spray gun: plasma spray gun is an important part of atmospheric plasma jet. Jetting range The surface of the material to be treated is generally within a plasma spray range of 5 to 30 mm through the area with the plasma nozzle. Working principle of plasma spray gun Plasma spray gun is an important part of the formation of plasma jet. The plasma spray gun will produce a certain temperature when working. When installing the plasma spray gun, it can be combined with the metal bracket as far as possible to facilitate heat dissipation. The material generally moves in a pipelined fashion through the opening of the plasma gun. Note: during the work, the material to be processed must not be left standing in the plasma spray area for a long time, so as not to be damaged by high temperature or have the risk of burning! In the process of use to prevent hand contact and scald! The voltage of plasma spray gun and its contained cable is too high, pay attention to prevent accidental damage resulting in electric shock danger! Power must be cut off before opening the case for cleaning. When there are ceramic materials in the plasma spray gun, it can be avoided to be damaged by impact when moving, installing and using. After a long time of use, the plasma gun will produce a certain amount of pollution in the body, which requires regular maintenance, cleaning and timely replacement of the wear and tear parts. Plasma cleaning machine equipment installation and maintenance. 1, spray gun installation: Install the plasma spray gun on the appropriate fixing bracket or mechanical hand, and take appropriate fixing measures to prevent the strong pull, friction and piercing of the high voltage cable, ground wire and air pipe on the spray head. Adjust the distance between the nozzle and the workpiece to be processed so that it is between 8 and 12 mm. (The treatment distance should be adjusted according to the material test, the speed and the subsequent process. The closer the relative distance is, the greater the treatment intensity will be, but too close will burn the material.) 2. Host installation: When the equipment is working, the fan and ventilation window of the main engine should not be blocked by objects. The host can not be placed close to the large area of iron surface, the distance between the equipment and such materials should be more than 10cm. In addition, eddy current losses can increase power consumption and increase equipment temperature rise.

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