Application of ultrafine powder in different fields
Functional materials are one of the most active fields in the research, development, production and application of polymer materials, and they have a very important position in materials science. Ultrafine powder is not only a kind of functional material, but also plays an extremely important role for the compounding of new functional materials, making it have broad application prospects and has a wide range of applications in various fields.
- The application of ultrafine powder in the plastics field
Ultrafine powders are widely used in the chemical industry. They are widely used in coatings, plastics, rubber, papermaking, catalysis, pyrolysis, organic synthesis, chemical fibers, inks and other fields. In the plastics industry, the compounding of ultrafine powder and plastics can play a role in strengthening and toughening. For example, after surface modification of nano-calcium carbonate, the toughening effect on the notched impact strength and double notched impact strength of the material is very significant. And the processing performance is still good.
In addition, the addition of ultrafine powder can improve the aging resistance of composite materials, prevent plastic light radiation aging, and increase the service life of plastic products. At the same time, the ultrafine powder can also functionalize composite materials, such as antistatic plastics, flame-retardant plastics, and self-cleaning plastics.
- Application in the catalyst industry
Used as a catalyst, the ultrafine powder mainly relies on its large specific surface area and incomplete surface atom coordination to increase the active sites on the surface and more active centers on the surface. The surface effect of ultrafine powder determines its good catalytic activity and selectivity of catalytic reaction. Catalysts are one of the important areas of ultrafine powder applications. The fourth generation of catalysts has been researched and developed internationally. The use of nano-scale catalysts can greatly increase the speed of chemical reactions, greatly shorten the time to complete chemical reactions, and greatly improve production efficiency. , The heat of combustion per gram of fuel can be doubled.
- Application in the field of coatings
The ultrafine powder can be used to prepare nano-modified coatings and nano-structured coatings. Some functions of nanoparticles can be used to modify existing coatings and improve the performance of coatings. Nano-modified coatings are coatings that use a special preparation process and add ultra-fine nano-materials, so that the nano-coatings have optical, mechanical and environmental protection functions, such as: nano-ceramic coatings, nano-non-stick coatings, self-cleaning coatings, and aviation ablative coatings Wait.
- Application of ultra-fine powder in the field of materials
The application of ultrafine powder in the field of materials is mainly reflected in the application of ceramic materials, building materials, and special functional materials. In the field of ceramic applications, the superfine powder has the properties of high surface energy, large number of surface atoms, and strong activity. It can be used as an activator in the sintering process to speed up the sintering process, shorten the sintering time, and lower the sintering temperature. At the same time, the ultrafine powder can significantly improve the microstructure of ceramic materials, optimize their performance, and achieve the purpose of densification by sintering at a lower temperature, so it is particularly suitable for the preparation of electronic ceramics.
In the application field of special functional materials, the surface properties of ultrafine powder determine that it is very sensitive to the external environment, such as temperature, light, moisture, etc. The changes in the external environment will quickly cause the surface or surface ion valence and electron transport. Change, that is, cause a significant change in its resistance. The unique properties of ultrafine powder make it the most promising material for sensors. Sensors with fast response speed, high sensitivity, and good selectivity can be developed for different purposes.
- Application of ultra-fine powder in the field of daily chemical industry
Nanotechnology has broad prospects in antibacterial, deodorization, and air purification. The photocatalytic performance and biodegradable sterilization performance of nano titanium dioxide and nano zinc oxide have been verified in products such as air purifiers, nano washing machines, nano refrigerators, nano toothbrushes, and nano towels. In skin care, cosmetics, clothing, etc., the role of ultra-fine powder is also very important.
For example, the use of nanometer titanium dioxide in sunscreen cream can greatly improve the quality of the cream and the effect of sunscreen and skin care. In toothpaste, shampoo, detergent, and decontamination powder, various powders are also used in large quantities. If these powders are ultra-fine, their use performance will inevitably be greatly improved.
- The application of ultra-fine powder in the fields of medicine and biology
In the fields of medicine and biology, the controlled release drug delivery system in pharmacy uses physical and chemical methods to change the structure of the preparation, so that the drug is automatically released from the dosage form at a constant rate within a predetermined time and acts on Organs or specific target tissues, and maintain the drug concentration within the effective concentration for a long time.
As a drug delivery system, microparticles or nanoparticles are prepared from materials that are basically non-toxic, have good biocompatibility, have a certain degree of mechanical strength and stability, and do not chemically react with drugs. When the microparticles and nanoparticles are administered parenterally, the materials are required to be biodegradable. The microparticles and nanoparticles system is absorbed by the liver, spleen, lung, etc., which are rich in reticulocytes, and are used as foreign matter by macrophages. Some particles can Attacked by the enzyme system in the lytic enzyme body, causing it to crack and release the drug, the particle size directly affects its distribution in the body. The ultra-fine powder also has excellent properties such as targeting, which can protect the coated material from damage. Processing the medicine into superfine powder can increase its residence time in the body and improve its bioavailability. The application of ultrafine powder technology in the fields of medicine and biology is very important.