At present, nanotechnology is considered to be the most revolutionary technology, which has had a significant impact on social livelihoods through its multidisciplinary applications. Silver nanoparticles (AgNPs) is a metal nanoparticle material that has been widely researched and applied. At present, the global market’s demand and enthusiasm for silver nanoparticles (AgNPs) continues to increase.
Chinese scholars have discovered a new strategy of highly effective antibacterial nano-silver, sterilization does not produce drug resistance.
Professor He from the School of Chemistry and Chemical Engineering of Hefei University of Technology and Professor Cha from the School of Food and Bioengineering have successfully developed a nano-silver aqueous dispersion with weak acid response recombination function, which can be sprayed on the wound to achieve an efficient target for drug-resistant bacterial infections For treatment, it eliminates bacteria while not producing resistant bacteria, and thus proposes a new high-efficiency antibacterial strategy. Relevant results were published online in the “Advanced Functional Materials” magazine a few days ago.
Scientists hope that a material that they claim can kill bacteria and viruses can be used in masks to help deal with the new coronavirus pneumonia epidemic.
The main component of this material is nano-silver with antibacterial properties, which is prepared by using a melt-blown process. Alexander Zanovich Medvedev, who worked on the project, explained that this made polypropylene fibers with a diameter of 1 micron. Medvedev is currently in charge of the work of a laboratory of the Siberian branch of the Russian Academy of Sciences. It is not clear whether this research has been published in a peer-reviewed journal.
Medvedev said in a statement that he and his colleagues put the finished material on the inner layer of a conventional three-layer medical mask. The chief researcher of the Institute of Chemistry and Technology Nikolai Zakharovich Liakhov said that the researchers tested the performance of the mask against influenza A virus, staphylococcus and E. coli.
When the research team compared this new material with the material of ordinary masks, it was found that the number of viruses passing through the latter was 10,000 times higher.
Nano-silver medical masks, using new nano silver antibacterial patented technology, developed and created the first reusable nano-silver non-woven medical masks in Guangdong Province. Based on the calculation of continuous wearing for 8 hours a day, the life cycle of a nano-silver non-woven mask can reach 7 days.
In addition to the conventional single-layer spunbonded non-woven fabric on both sides of the inside and outside, and the middle melt-blown non-woven fabric, the mask also contains a layer of nano-silver non-woven fabric, which has strong water absorption, releases high-activity silver ions, and kills bacteria and viruses. When breathing moist gas, it will release silver ions for a long time to kill bacteria.
The test results of the Hong Kong Polytechnic University wearing experiment show that after 8 hours of wearing, the total number of bacteria on the surface of this type of mask is still far below the range allowed by the national standard, and it can be used repeatedly; the test report of the NELSON laboratory approved by the US FDA shows that the The bacterial filtration rate of the type mask is over 99.7%. After 18-24 hours of continuous use, its bacterial content still does not exceed the range allowed by the national standard, and it can be used repeatedly for a long time.
The research team of Shanghai University has developed 6Cr16MoMA ultra-high hardness stainless steel containing nano-antibacterial silver, which has high strength plastic toughness and sterilization function. The core technology has been authorized by the national invention patent.
In 2017, the Antibacterial Material Testing Center of the Institute of Physics and Chemistry of the Chinese Academy of Sciences tested the antibacterial properties of the material and found that the antibacterial rates for E. coli and Staphylococcus aureus were both ≥99%. In 2019, after further testing by Shanghai Ingeer Testing Technology Service Company, the material has an antibacterial rate of 99.61% against Candida albicans and an antibacterial rate of Pseudomonas aeruginosa ≥99.99%. This stainless steel material not only has a high antibacterial rate, but also has excellent mechanical properties. It is used in the production of household kitchen knives. Its cutting performance is equivalent to that of high-end imported kitchen knives. It is much better than similar domestic products and is at the leading domestic level. Get latest nano silver price from https://www.hwnanomaterial.com.