图片名称

NEWS

Popular Articles

Contact Us

图片名称
图片名称

Service Hotline

13632675935

CRF

TEL：13632675935

E-mail：shaobo@sfi-crf.com

Address: 1303, Building 3, Manjinghua Science and Innovation Workshop, No.6 Songjiang Road, Songgang Street, Bao'an District, Shenzhen, China.

Plasma Surface Modification Graft Polymerization of Metal Polymer Materials

Plasma Surface Modification Graft Polymerization of Metal Polymer Materials

Graft polymerization is one of the commonly used methods in plasma surface modification. The grafting of appropriate monomers or polymers can improve the hydrophilicity, adhesion, corrosion resistance, electrical conductivity and biocompatibility of metal polymer materials. Agnesr, Denes et al. grafted polyethylene glycol (PEG) onto the surface of stainless steel by plasma surface modification. XPS results showed that the introduction of a large number of -CH2-CH2-O groups on the surface of stainless steel could significantly improve the surface hydrophilicity of the material. It can reduce the roughness and greatly reduce the adsorption of bacteria on the surface of the material. In the treatment of coronary vascular disease, the common clinical method is to do coronary angioplasty (PTCA). That is, in the blood vessel with metal dilator will be open, but the polymer metallized Steetan fixed film used in them still has a high coagulation, so the blood vessel will be restenosis. Lahann et al. polymerized p-xylene chloride on the surface of polymer metal by CVD method, and then treated with SO2 microwave plasma. The results show that the contact Angle is reduced to 15 degrees after treated with SO2 plasma, and the hydrophilicity of the material surface is improved. The adhesion between polymer and metal is involved in the grafting of polymeric organic matter on the surface of metal plasma or the metallization of polymer surface. E.C.Zhang et al. studied the adhesion of polytetrafluoroethylene (PTFE) to metal aluminum. They first pretreated PTFE with an argon plasma at a frequency of 40kHz, a power of 35W, and an argon pressure of 80Pa. And its exposure to the atmosphere about 10 min to produce oxide and peroxide, and then conducted on the acrylic ester of glycerol alcohol namely GMA graft copolymerization, and then to thermal evaporation aluminum, make with GMA graft copolymer of PTFE and PTFE is the adhesion force between A and 22 times between Al, that only by Ar plasma pretreatment of 3 times between PTFE and Al. E.D ayss respectively with three methods (mechanical casting rough method, oxygen, nitrogen, argon, low pressure plasma and produce interlayers method) to deal with polypropylene, research metal polymer on the adhesive properties, the results show that mechanical casting rough method in the improvement of adhesion of polypropylene and q of copper is valid, but the plasma treatment can lead to better results, especially the Ar plasma, plasma polymerization of acrylic acid middle tier contains C - 0 keys showed very strong adhesive.

MORE +
Methods of surface modification of biomedical metal materials

Methods of surface modification of biomedical metal materials

Biomedical chemical method for surface modification of metal materials is a new kind of technology developed in recent years. This is based on the idea that bioactive substances are directly attached to the modified metal substrate, and organic macromolecular substances such as proteins or enzymes are introduced into the substrate surface to make it have better biological activity, so it has the characteristics of more direct and more effective. Some researchers have treated metal surfaces with NH3 and N2 plasma to introduce amino groups, which are then quaternized by methane iodide reaction. Heparin, an anticoagulant with a negative charge sulfate, is then used to form a complex with the quaternized amino groups on the surface, thus fixing heparin on the metal surface. The nitrogen group formed on the metal surface can also be used to fix proteins. Most metal materials are coated with a hydrophilic polymer film. Under certain conditions, it will interact with [H] or H- to form hydroxyl groups (-OH) adhering to the surface of the matrix. In this case, the matrix is silylated with APS(An1Inopropyltriethox-YSI-Lane) plasma. Some proteins or enzymes, such as trypsin, are bonded to the surface of the matrix by the action of glutarate aldehyde. This method can fix living biomolecules on the surface of metallic, inorganic, non-porous and non-loose biomaterials, thus greatly improving the surface activity of the materials. Most metal substrates, such as Ti, Ti6Al4V, Co-Cr-Mo and TiTA30, can be modified by plasma grafting of organic matter to adsorb biomolecules directly on the surface. Artificial biomaterials used for transplantation, tissue culture or other purposes must be biocompatible with the biological environment in which they are used. At present, the development needs the biocompatibility of the adherent cell surface, focused on the fixed ECM proteins and metal substrate surface, for those who don't need to attach to cells, such as blood cells used in material surface modification technology is to produce highly inert surface, such as hydrocarbons, fluoride or bioactive molecules to ban cell fixation, or producing highly hydrophilic groups, etc.

MORE +
Biological research plasma surface treatment equipment to improve the corrosion resistance of metal

Biological research plasma surface treatment equipment to improve the corrosion resistance of metal

Once the metal material in the biological body corrodes, the corrosion products generated by the dissolved metal ions will have a bad effect on the human body, so the corrosion must be controlled. Research shows that the metal material itself will not produce allergic reaction to the human body, but because of corrosion and dissolved metal ions or dissolved ions in the form of metal salt and the combination of biological molecules or the form of abrasive powder will cause harm to the human body. In addition, the fracture of metal materials in the human body is usually caused by fatigue and friction fatigue, but these two factors are not simple, in fact, it is caused by corrosion fatigue, and corrosion is closely related. To prevent the toxicity of metal materials in the human body. To improve its safe use and prolong its service life, in the biological environment, biological research plasma surface treatment equipment on the corrosion performance of metal materials is very important. At present, most of the commonly used clinical medical stainless steel contains nickel (such as medical 316I stainless steel containing nickel for 10 ~ 14). Nickel element is a potential sensitization factor. The precipitation and enrichment of nickel ions in human body due to corrosion or wear can induce toxic effects, cell destruction and inflammatory reactions. Similarly, the Co and Ni elements in medical Cobalt-based alloys also have serious sensitization problems. The V and Al in medical titanium alloy are also harmful to organisms. These problems restrict the application of metal biomaterials. Metallic biomaterials direct contact with the body's tissues, in order to make implant materials, give full play to its function in the body by plasma surface modification on it, for example, in the stainless steel surface by a layer of polymer film, low temperature plasma grafting or spraying a layer of diamond thin films, in cobalt base alloy and titanium alloy surface with biological research of plasma surface treatment equipment of the preparation of plasma grafting TiO2 thin film can effectively prevent the precipitation of nickel ions, improve its corrosion resistance, reduce the abrasion of the product ion precipitation around the implants adverse reactions, greatly improve the safety of biological implant materials use for a long time.

MORE +
Research Status of Surface Modification of Metal Biomaterials by Low Temperature Plasma

Research Status of Surface Modification of Metal Biomaterials by Low Temperature Plasma

With the development of basic industries and high-tech products, the demand for high quality and efficient surface modification and coating technology has been extended in depth. Under the mutual promotion of this field and related disciplines, breakthroughs have been made in surface modification of metal biomaterials and coating process simulation and performance prediction. As an important part of the development of new metal biomaterials, surface modification and coating technology have penetrated into the traditional industry and high-tech industry sectors, and in turn promoted the further development of surface functional coating technology according to the application requirements. It has become an important research direction of low-temperature plasma surface modification technology to design the material surface, cut the surface performance parameters to meet the specific requirements, and further realize the prediction of the structure and properties of the surface coating. Various plasma vapor deposition is the world famous research institutes and universities to carry out a challenging research topic, overseas has the plasma chemical vapor deposition (PCVD), and other surface modification method was carried out by computer simulation, in view of the PCVD process was simulated, the macroscopic and microscopic multi-level model, the plasma technology and coating of various properties and simulate and predict the adhesion strength of the matrix; Computer simulation of the performance stress of the permeable layer on the metal surface can better control and optimize the process. In the future according to the development of the plasma surface modification technology at home and abroad, combined with the demand and status quo of biomedical engineering, in a batch of advanced applied during the development of metal material surface function cladding, key technologies, including new type of low temperature plasma vapor deposition technology and equipment, surface coating technology and the quality of the research and development of the numerical simulation and optimization control and so on. To sum up, low-temperature plasma technology is doing a lot of research on surface modification and surface film synthesis of metal biomaterials due to its unique advantages, but most of these studies are still in the development stage or test stage. With the further study of plasma theory and the solution of technological problems, the surface modification technology of low-temperature plasma will certainly improve the biological properties of metal materials, reduce toxic and side effects, and play a positive role in medical application.

MORE +
Applications of low temperature plasma biomedical technology

Applications of low temperature plasma biomedical technology

Physical methods dominated the discovery and preparation of new materials for most of the first half of the 20th century. Since the 1950 s, the idea and way of molecular biology was quickly recognized as new material growth, discovery, and the crystallization of the guiding ideology, because most of the biological reaction occurred in the material interface and on the surface, biologists will introduce a surface science biology, to promote the development of biomedical materials play a decisive role, biomedical materials and devices in the rescue ability of human's life, as well as the huge commercial value strongly stimulate the study of many channels. Low temperature plasma technology on the growth of biomedical materials and the preparation of biomedical device has unique advantages and potential, therefore, if the biomedical and organic integration of low temperature plasma technology is likely to lead to the development of biomedical technology in the 21st century revolutionary, biomedical materials refers to the involved in biomedical research and medical practice and biological compatibility of materials, including materials, biosensor materials to make artificial organs, in vivo transplantation device outside surface materials, as well as some of the medical equipment used by material, , etc., most organisms on the material on the surface of the reaction is controlled by the surface of the material chemistry and molecular structure, which requires the biomedical materials not only need to have a certain strength, elasticity, such as liquid, has the biological compatibility of surface properties and requirements, a new design of the liquid and the surface characteristics of materials at the same time with the required is quite difficult, since the biological response to the material surface mainly depends on the material surface chemical properties and molecular structure, you can choose the existing with the required liquid material surface modification, make its surface has the required biological compatibility, For example, some macromolecular polymers have mechanical properties similar to human organs, but they do not have biological compatibility. Therefore, surface modification is needed to fix specific functional groups on the surface to achieve compatibility with living bodies. In addition, we can have a choice of material surface modification, make it has a specific function, which requires to change and control of surface functional groups, we will be this kind of surface modification of existing materials to the right to obtain corresponding biological compatibility method called interface design, interface design of various materials of biological origin have different challenge, the challenge comes from the surface of the different functions and to identify the organism, according to the demand to choose suitable functional group, and to choose appropriate technology introduces the functional groups on the surface of, for many of the existing materials, plasma polymerization and plasma polymerization combined with grafting technology, It is a very effective and economical surface modification technology, and has been paid more and more attention and interest by the biotechnology and engineering circles. The characteristic of this technology is that the surface properties can be changed by selectively changing the functional groups of the surface, so as to achieve the required surface properties.

MORE +
How to do the right maintenance strategy for plasma surface treatment machine

How to do the right maintenance strategy for plasma surface treatment machine

Plasma surface treatment machine is a multifunctional machine, can increase the surface tension, nanoscale fine cleaning, remove static electricity, activate the surface. Nowadays, more and more attention is paid to saving cost, protecting environment and safety. It has become indispensable and loved by all walks of life, whether for manufacturing or experimental research and development. With the increasing market demand, plasma surface processors are widely used in all walks of life. Because of its relatively cheap price, its maintenance is also valued by everyone. After a period of use, if you do not pay attention to routine maintenance, the function of the plasma surface processor is easy to damage, directly affect the surface treatment effect, processing speed and the life of the plasma equipment. Therefore, it is necessary to maintain regularly, so how to do the maintenance strategy of plasma surface processor correctly? Warm Tips: The maintenance of the plasma surface processor must be performed by a professional. Non-professional personnel are prohibited from disassembly and maintenance to avoid unnecessary loss or personal injury.   Daily maintenance strategy: 1. Check whether the voltage of the display screen is normal, within the voltage range of 220V ±10%; 2. Check whether the plasma pressure is within the normal range. The air pressure of rotary plasma machine is 0.2-0.3 Mpa, and the air pressure of direct injection plasma machine is 0.1-0.2 Mpa (slightly different according to the actual processing situation); 3. Check whether the power plug of the plasma surface processor is effectively grounded; 4. Confirm that the switch is normal and effective, press the switch to check whether it is energized; Whether the plasma flame works normally, turn the plasma machine to observe whether the gun head rotates normally. 5. Check whether the distance between the nozzle of the plasma surface processor and the material is within the normal range (direct injection distance is 10-20 mm, rotation distance is 6-10 mm); 6. Clean up the dust, dirt and foreign matter inside the equipment, and remove the dust, dirt and foreign matter with vacuum cleaner, alcohol and dust-free cloth after power failure;   Weekly maintenance strategy: 1. Keep the machine clean, clean the surface and interior of the machine; 2. Check water pollution and oil pollution in the air filter once a week; 3. Check that the high-voltage cable between the sprinkler head and the main machine should be wired naturally, and large Angle bending is forbidden;   Monthly maintenance strategy: 1. Clean the dust on the surface of the fan and high voltage transformer in the main engine with the brush every month, and clean the dust on the surface once half a month in bad environment; 2. It is recommended to oil bearings once a quarter; 3. Check whether the plasma flame intensity meets the product treatment standards. If the flame is shortened, the distance between the nozzle and the material needs to be shortened; Plasma copper core to be replaced once a year or so.   Notes for use: 1. There is high frequency and high pressure inside the plasma system. It is strictly prohibited to open the back cover of the chassis for debugging and maintenance, and reliable grounding. To avoid electric shock, do not operate with wet hands. 2. The temperature of plasma flame is very high, do not use it in places with inflammable and explosive articles. 3. Please do not touch the plasma flame with your hands to avoid electric shock and scald. 4. When the plasma machine is moving, it is strictly prohibited to put the body and other articles into the protective cover to avoid unnecessary losses; 5. Without the permission of the equipment technician, it is not allowed to change the specific system parameters at will; 6. In case of emergency due to improper operation of the machine, press the button to turn off the power immediately.

MORE +
< 1...545556...132 > proceed page
图片名称

CRF

National Service Hotline

136 3267 5935

Contact Email

shaobo@sfi-crf.com

Address:1303, Building 3, Manjinghua Science and Innovation Workshop, No.6 Songjiang Road, Songgang Street, Bao'an District, Shenzhen, China.

图片名称

Add WeChat
Get related information

Links

Apply to exchange friend links

Copyright © Shenzhen Chengfeng Smart Co.

京ICP备10002622号-38

粤公网安备 44030602005200号

图片名称

Cheng Feng Zhi Zuang a focus on plasma research and development for 20 years

We

The services of

Inquire for free sample testing

1-to-1 program customization

24-hour online after-sales service

Source manufacturer

Get the program
%{tishi_zhanwei}%
图片名称

Scan the code for information

诚峰智造