Plasma surface treatment technology refers to bombarding the surface of the material with high-energy particles in the plasma to degrade the surface material and increase the surface roughness. If there are other active particles in the plasma, such as oxygen plasma, they can react with the surface material. A method of surface activation. Plasma treatment technology can be applied to the surface treatment of fibers, plastics, rubber and composite materials.
Low-pressure plasma surface treatment technology provides an environmentally friendly and economical method for surface modification of materials at the microscopic scale, and does not require mechanical processing and chemical reagents in the modification process. Using low-pressure plasma surface treatment technology can not only achieve cleaning, activation, and etching on the surface of the material, but also modify and optimize the surface of plastic, metal or ceramic materials, improve their bonding ability or give new surface properties. Its potential medical value includes improving the hydrophilic or hydrophobic properties of the material surface, reducing the surface friction and improving the barrier properties of the material surface. At present, various surface modification technologies are being actively studied at home and abroad to achieve the purpose of controlling tissue adhesion, reducing tissue resistance, anti-embolism or infection, and as an inhibitor of chemotherapy or removing certain specific protein cells. The focus is on short-term research. Or long-term will affect the surface properties of the tissue reaction.
Plasma surface treatment technology is a technology that can improve the surface adsorption of most medical polymers by only changing a few atomic layers on the surface. For example, modified polyolefin, silica gel and fluoropolymer materials show good adhesion. Based on this similar principle, plasma surface treatment technology is used to realize the material surface required for transplantation and polymerization without losing the physical properties of the material itself. Plasma surface treatment does not affect the physical properties of the material. Compared with the part that has not been treated by plasma technology, the part of the material after plasma treatment is generally indistinguishable visually and physically. At present, plasma surface treatment is usually used to control the wettability of test tubes and laboratory utensils, the treatment of blood vessel formation airbags and catheters before adhesion, the treatment of blood filtration membranes, and the surface properties of biological materials are changed to improve or inhibit cell growth. The growth state of the surface of these materials.
Plasma surface treatment is usually a plasma reaction process that changes the surface molecular structure or performs surface atomic substitution. Even in an inactive atmosphere such as oxygen or nitrogen, plasma treatment can still produce highly reactive groups under low temperature conditions. In this process, the plasma will also generate high-energy ultraviolet rays, which together with the generated fast ions and electrons provide the energy required to break the polymer bond and produce surface chemical reactions. Only a few atomic layers on the surface of the material participate in this chemical process, the bulk properties of the polymer can maintain the possibility of deformation. The selection of appropriate reaction gas and process parameters can promote a unique specific reaction, forming an unusual polymer attachment and structure. Generally, the reactants can be selected to make the plasma react with the substrate material, and the volatile attachments are generated. These attachments on the surface of the processed material can be removed by the vacuum pump due to desorption, and the surface can be etched without further cleaning or neutralization.