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Low-temperature plasma surface treatment technology improves crop seeds and increases insect resistance and germination rate

Low-temperature plasma surface treatment technology improves crop seeds and increases insect resistance and germination rate

Low-temperature plasma surface treatment technology improves crop seeds and increases insect resistance and germination rate: In recent years, with the increasing maturity of low-temperature plasma surface treatment technology, plasma seed technology has begun to be applied to agricultural breeding, which is still a new research field at home and abroad. The low-temperature plasma surface treatment technology uses plasma to clean the surface of the seeds to improve the vigor of the seeds, so that the treated crops have a strong growth advantage throughout the growth period from germination to maturity, and achieve the purpose of increasing yield and resistance. This shows that plasma surface treatment has the following main functions in breeding: 1. Significantly improve germination potential and germination rate: Plasma surface treatment can promote seed germination and make seeds germinate 1 to 2 days ago. Germination vigor and germination rate have also been significantly improved, and the germination rate of stale seeds and varieties with low germination rate can be increased by 10%~15%; 2. Prevention and control of diseases and insect pests: The surface treatment of seed plasma can effectively kill the germs on the surface of the seeds, thereby improving the disease resistance of the seeds during germination and significantly reducing the occurrence of diseases at the seedling stage; 3. Improve stress resistance: Plasma surface treatment can activate the activities of various enzymes in seeds, thereby improving the tolerance of crops to drought, salinity and low temperature. 4. Obvious advantages in growth: After seed plasma surface treatment, seed vigor and various enzyme activities are significantly improved, which significantly promotes the growth of plant roots, and the root coefficient and dry matter weight are significantly increased. Mainly manifested as thick and knotty rhizomes, rapid growth and development, vigorous crop growth, and generally strong plants; 5. Promote early maturity to increase yield: low-temperature plasma surface treatment technology is used to improve the processed crop seeds to make their fruits mature early and increase grain yield by 8% to 12% on average.

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Low-temperature plasma surface treatment technology causes changes in the molecular structure of the material surface

Low-temperature plasma surface treatment technology causes changes in the molecular structure of the material surface

Low-temperature plasma surface treatment technology causes changes in the molecular structure of the material surface: Low-temperature plasma surface treatment technology refers to the use of high-energy particles in the plasma to bombard the surface of the material to degrade the surface material and increase the surface roughness. Add other active particles, such as oxygen plasma, to the plasma. A method of surface activation by reaction of surface substances. Plasma treatment technology can be used for the surface treatment of fibers, plastics, rubber and composite materials. Low-temperature plasma surface treatment technology provides a method for micro-modification of environmentally friendly and low-cost materials, and the modification process does not require mechanical processing and chemical reagents. Through the low-voltage plasma surface treatment technology, the surface of the material can be cleaned, activated, and etched, and the surface of plastic, metal or ceramic materials can be modified to improve its bonding ability or give new surface properties. Its potential medical value includes improving the hydrophilicity or hydrophobicity of the material surface, reducing surface friction, and improving the barrier properties of the material surface. Low-temperature plasma surface treatment technology is a technology that only changes a few atomic layers on the surface of a polymer to improve its surface adsorption capacity. The modified polyolefin, silica gel and fluoropolymer materials have good bonding properties. According to this similar principle, using plasma surface treatment technology, while obtaining the surface of the material that needs to be transplanted and polymerized, the physical properties of the material itself will not be lost. Plasma surface treatment has no effect on the physical properties of the material, and the position of the material after plasma treatment is generally indistinguishable visually and physically compared with the position not treated by plasma technology. Low-temperature plasma surface treatment is usually a plasma reaction that causes changes in the molecular structure of the surface or the arrangement of atoms on the surface. Plasma treatment can generate highly reactive groups in a low temperature environment, even in an inactive environment such as oxygen or nitrogen. In this process, the plasma also generates high-energy ultraviolet light, which together with rapidly generated ions and electrons provide the energy required to interrupt polymer bonding and produce surface chemical reactions. In this kind of chemical process, only a few atomic layers on the surface of the material participate, and the bulk properties of the polymer are likely to remain deformed. Choosing appropriate reaction gases and process parameters can promote certain specific reactions, thereby forming special polymer attachments and structures. Reactants are often used to make the plasma react with the substrate to generate volatile attachments. The appendages on the surface of the processed material are removed by the vacuum pump due to desorption, and the surface can be etched without further cleaning or neutralization.

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What substances are difficult to remove during the cleaning process of the vacuum plasma surface treatment machine

What substances are difficult to remove during the cleaning process of the vacuum plasma surface treatment machine

What substances are difficult to remove during the cleaning process of the vacuum plasma surface treatment machine: The vacuum plasma surface treatment machine, also known as the plasma surface treatment instrument, is a brand-new high-tech, which uses plasma to achieve effects that cannot be achieved by conventional cleaners. 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. In daily life, we must not only recognize the advantages of vacuum plasma cleaning technology, but also recognize its shortcomings and problems in use. Plasma cleaning also has some limitations in its application, which are mainly manifested in the following aspects: 1. In actual use, it was also found that plasma cannot well remove fingerprints attached to the surface, which is a common contaminant on glass optical components. Plasma cleaning cannot be used to completely remove fingerprints, but it needs to extend the processing time. At this time, it must be considered that this is the adverse effect it will bring to the substrate. Therefore, other cleaning measures must be taken to cooperate with the pretreatment, which makes the cleaning process more complicated. 2. Practice has proved that it cannot be used to remove grease stains. Although a small amount of grease stains on the surface of an object can be cleaned with a plasma method, the effect of removing grease stains is often not good. 3. This method cannot be used to remove the cutting powder on the surface of the object, which is particularly obvious when cleaning the grease on the metal surface. 4. Because the vacuum plasma surface treatment machine cleaning process requires vacuum processing, and is generally online or mass production, when the plasma cleaning device is introduced into the production line, the storage and handover of the workpiece must be considered, especially when the volume of the workpiece is large and This issue should be considered even more when the processing volume is large. In the cleaning process of the vacuum plasma surface treatment machine, the main issues that need to be paid attention to are the above points. If you want to know more, please pay attention to the WeChat official account made by Chengfengzhi, I will always update for you.

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Today, let’s talk about the plasma technology of different plasma processors

Today, let’s talk about the plasma technology of different plasma processors

Today, let’s talk about the plasma technology of different plasma processors: 1. Vacuum plasma processor technology: This type of plasma is generated in a closed vacuum (10-3 to 10-9 bar). Compared with normal pressure, there are fewer particles per unit volume, which increases the free path length of particles and relatively reduces the collision process. As a result, the tendency of plasma energy to decay is weakened, and it can spread more widely in space. In order to manufacture the vacuum chamber, a powerful air pump is required. Vacuum plasma technology has no linkage connection function. 2. High-voltage plasma processor technology: The high-voltage plasma is generated by a dedicated gas discharge tube. This type of plasma is not important in surface treatment. 3. Corona treatment technology: The corona treatment technology is a physical method that uses high pressure, and is mainly used for thin film processing. The disadvantage of corona pretreatment is that its surface activation ability is low, and the surface effect after treatment is sometimes not uniform. The reverse side of the film can also be treated, which can sometimes be avoided according to process requirements. In addition, the surface tension obtained after corona treatment cannot be kept stable for a long time, and the processed product can only be stored for a limited time. 4. Atmospheric plasma treatment technology: The atmospheric pressure plasma processor technology is a plasma generated under atmospheric pressure conditions. The atmospheric pressure plasma processing technology has low cost and excellent performance. It can be used as a process substitute and process improvement for vacuum plasma and corona plasma, and is widely used. One of the major advantages of atmospheric plasma technology is its online comprehensive performance. This technology can be smoothly integrated into the existing production system as a process criterion.

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The surface of the glass plasma cleaner is cleaned and coated to improve the bonding strength

The surface of the glass plasma cleaner is cleaned and coated to improve the bonding strength

The surface of the glass plasma cleaner is cleaned and coated to improve the bonding strength: The mobile phone screen will be coated on the surface everywhere, and its effects are different, some are to improve the light transmittance; some are to improve the hydrophobicity and oleophobicity by brushing the AF film (anti-fingerprint film, in fact, its The actual effect is mostly anti-fingerprint). The surface of some raw materials is very smooth, and some have air pollutants, which can make the surface difficult to be plated, or the surface is easy to fall after plating, just like it is easy to fall when paint is painted with rusty iron. At this time, it is necessary to improve the roughness of the product surface and remove the impurities on the surface to carry out high-quality coating treatment, just like we need to use abrasive paper to remove rust and then paint. Now the problem is coming, we are unlikely to wipe the phone screen clean with sandpaper, so the phone screen will be scratched. So, is there a way to remove impurities on the surface of the mobile phone screen and increase the roughness of the screen surface without affecting the normal use of the screen surface? At this time, the glass plasma cleaning machine was developed. In 1879, Crokes made it clear that there is a fourth state in matter, which is what we call plasma. The plasma generated by the glass plasma cleaning machine through the reaction contains electrons, ions and highly active free radicals. These particles are very simple. The pollutants on the surface of the product will also react to form carbon dioxide and steam, so as to increase the surface roughness and surface cleaning. Effect. Plasma can form free radicals through reaction to remove organic pollutants on the surface of the product, thereby activating the surface of the product. The purpose is to improve the surface adhesion and the reliability and durability of surface adhesion. It can also clean the surface of the product, improve the surface affinity (reduce the water drop angle), and increase the adhesion of the coating in the body. On the other hand, if compressed air is used as the gas source of the glass plasma cleaning machine, the ejected plasma has a large amount of oxygen ions and free radicals, which can be deposited on the surface of the product. If the product after plasma treatment is quickly coated or sprayed After processing, the oxygen ions will chemically bond with the product and the spraying material. This bonding reflection can further improve the bonding strength between the molecular structures, making the film difficult to detach and fall. In addition, the glass plasma cleaning machine processing process is also a micro-processing method. Generally, the processing depth can reach nanometer to micron level. It is difficult to see the changes before and after the product is processed. Therefore, the plasma cleaning machine is widely used in mobile phone electroplating and new materials, etc. Manufacturing Industry.

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The plasma generator power supply chooses different process gas classification and action mechanism

The plasma generator power supply chooses different process gas classification and action mechanism

The plasma generator power supply chooses different process gas classification and action mechanism: The process gas used by the plasma generator power supply, such as hydrogen, argon, helium and other right and wrong reflective gases. This gas atom cannot directly enter the macromolecular chain on the surface of the macromolecule, but due to the bombardment of the surface by the high-energy particles in the non-reactive gas plasma, energy transfer is performed, and a large number of free radicals are generated. These free radicals pass on the surface. A large number of free radicals are formed on the surface due to the formation of double bonds and cross-linked structures. Therefore, the non-reactive gas plasma forms a thin and thin cross-linked layer through the surface, which not only changes the free energy of the material surface, but also reduces polymerization. Exudation of low-molecular-weight substances (plasticizers, antioxidants, etc.) inside the substance. When the plasma discharge of hydrogen ion plasma generator power supply selects lazy gas for plasma surface treatment, if the processed polymer material itself contains oxygen, the macromolecules will split to produce macromolecular fragments, which enter the plasma and provide oxygen for the plasma system , Will also produce oxygen plasma effect. If the material itself does not contain oxygen, after lazy plasma treatment, new free radicals (with a half-life of up to 2 to 3 days) and the oxygen effect in the air can also cause the combination of oxygen and macromolecular chains. Therefore, inert gas plasma treatment contains In the case of oxygen polymers, cross-linking and etching will occur, and polar groups will be introduced into a tripartite competitive reaction. For oxygen-free polymer materials, oxygen-containing groups will be introduced only after the treatment and the effect of oxygen in the air. Plasma generator power plasma surface treatment refers to the physical and chemical process of non-polymeric gas on the surface of polymer materials during plasma surface treatment. Non-polymerized gases include reactive gas and non-reactive gas. The mechanism of action of different gas classification methods selected by the plasma generator power supply on the surface effect of macromolecules is also different. Plasma generator power supply plasma-induced polymerization refers to polymerization induced by activated particles (molecules) under glow discharge conditions. Free radicals are apparently generated and then combined with monomers. For example, molecular chains are cross-linked or side-linked. Chain grafting, functional group replacement and block polymerization, etc. To use plasma-induced polymerization to form a polymer, the monomer must contain a structure with polymerization energy, such as a double bond, a triple bond, or a ring bond. Plasma state polymerization (PSP) is a process of re-polymerization of particles activated by plasma and deposited on the surface. This polymerization is the process of atoms that occur in the plasma.

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