China's long-lasting antimicrobial coating was successfully developed

On August 11, the reporter learned from the Material Interface Research Center of Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences that a scientific research team led by the director of the center, Professor Yu Xuefeng, has successfully developed a long-lasting antimicrobial coating based on microencapsulation technology, which has passed Tested by a number of third-party authorities at home and abroad.

According to Yu Xuefeng, the coating has a significant killing effect on viruses and bacteria, with an effective protection time of up to 6 months, and can be used in daily surface disinfection, air filtration, water purification, cold chain transportation and other fields.

During the new crown pneumonia epidemic, the Guangzhou Center for Disease Control and Prevention detected nucleic acid fragments of the new crown virus on the door handles touched by the confirmed patients. This makes people realize that public health safety and personal cleansing protection have become the focus of the whole society. Limiting the production of pathogenic microorganisms, reducing the reproduction of pathogenic microorganisms and blocking the spread of pathogenic microorganisms are the key links in achieving the control of epidemics and infectious diseases. .

"Currently widely used antimicrobial materials usually include alcohol compounds, phenolic compounds, metal salts, peroxides, etc. Usually, spraying disinfectant can achieve the purpose of removing germs, but disinfectant is volatile and difficult to long-term Play a role and cannot prevent germs from staying on the surface of the object. Therefore, the development of a material that has the effects of quickly killing microorganisms and long-term inhibition of microbial growth is currently preventing people from being exposed to the possibility of infection and ensuring people's normal work and life Urgent need." Yu Xuefeng said.

Yu Xuefeng's R&D team succeeded in developing a coating with long-lasting antiviral and antibacterial functions based on the previous accumulation in the fields of microencapsulation technology, metal ion modification technology and coating technology, and after several months of emergency research. The coating adopts a specially designed microcapsule structure, with a compound antimicrobial active reagent as the core material, a special resin as the wall material, and a reasonable microcapsule structure design to achieve a controlled and sustained release of the core material. The modification with metal ions enhances the antimicrobial effect.

When in use, this kind of paint is sprayed on the surface of the object to achieve contact and killing of pathogenic microorganisms. It can also quickly form a film on the surface of the object, and achieve long-term inhibition of microorganisms through the slow release of active agents. At the same time, this kind of coating can also form a super-hydrophobic surface, which makes it difficult for microorganisms to stay on the surface and has an anti-adhesion effect. This multifunctional antimicrobial coating is simple to use, and the effective time of antibacterial on the surface of the object can be as long as 6 months, which greatly inhibits the spread of pathogenic microorganisms and enhances the protective effect of susceptible people. In addition, this microcapsule coating can adjust its particle size according to different needs, and the size can reach nanometer level.

Through further technical research, the team has completed the pilot-scale preparation of this multifunctional long-term antimicrobial coating and successfully achieved a ton-level daily production capacity. Yu Xuefeng said that they are expanding the scope of use of this new type of coating. They plan to apply it to fresh air systems and air purification systems. They can also coat a layer of nano-thick new coatings on the surface of meltblown non-woven fabrics to make killable Virus masks.