Do Antimicrobial Coatings Work?
Antibacterial coatings have become a popular choice because of the growing concern about bacteria. These products are commonly used in bathrooms and floors. Some are even used in children’s rooms. The effectiveness of antibacterial coatings remains a mystery. This topic has received more attention due to the Covid 19-pandemic, and the corona epidemic.
Antimicrobial coatings that are continuously active
Continuously active antimicrobial coats (or CAAs) are coatings that prevent bacteria growth on surfaces. Many companies claim that they can create durable coatings that can effectively control and transmit bacteria. But there are some concerns with these claims.
First, these coatings have not yet been FDA-approved. EPA has however approved one CAA through its Emergency Waiver process. The scientific community must also develop standard evaluation protocols for these products. This will allow for a standardized evaluation of their effectiveness. However, it is important to note that there are still many questions about the effectiveness of CAAs in controlling the spread of infectious bacteria.
Continuous active antimicrobial coatings must be evaluated for their effectiveness against live germs. To assess the efficacy of an antimicrobial coating, it is necessary to measure the number of live germs on the surface.
Silver ions
Silver ions are capable of inhibiting microbial DNA replication and inhibiting ATP hydrolysis in various materials. Silver ions can inhibit microbial DNA replication, inhibit the expression of ribosomal protein and ATP hydrolysis in some cases. This property was demonstrated by Liu et al. (research team), who prepared composites from H12MDI, MDI based PU and silver nanoparticles. This material’s antimicrobial activity was adjusted by changing its size and density.
One study found that silver-based antimicrobial paper coatings are effective against the Covid-19 viruses. This test was not conducted in commercial laboratories. The silver-based antimicrobial coatings on paper reduced the number viruses in the air by 95% within two hours. The results of the study suggest that silver is a viable alternative to copper and other antibacterial agents in antibacterial and antifungal coatings.
Zeolite
Zeolite antimicrobial coatings work by containing nanoparticles that inhibit the growth of microorganisms. Humans can be affected by microorganism contamination. Escherichiacoli O157H7, Salmonella and Listeria monocytogenes are the most common food-borne pathogens. These pathogens are prevented from colonizing food and surfaces by Zeolite antimicrobial coateds.
Zeolite antimicrobial coats can be used for a variety of purposes, including sterilization of clothing and equipment. The antimicrobial properties of this material are backed by rigorous testing. These coatings can be used in medical devices, sports gear, and even appliances and water filters.
In addition to its antimicrobial effect, zeolite can also reduce the growth of some bacteria and viruses. Recent research showed that zinc/silver Zeolite antimicrobial coatings inhibited human Coronavirus 229E (important pathogens that cause illness) and feline Calicivirus F-9 (important).
Ion exchange
Ion exchange is a promising method to make antimicrobial coatings. This technology is based upon a polymer that uses the ion exchange method to kill bacteria. This material has already been used in space suits, but can be easily adapted for use on surfaces. Ion exchange resins have excellent chemical stability and are resistant against UV degradation and bleach. They can also be made as thin coatings that can easily be applied to fabrics.
The market for antimicrobial coatings is likely to grow faster than the sanitary facilities, kitchen, and air conditioning and ventilation systems segments combined, due to rising concern over HAIs. To reduce healthcare costs, doctors are increasingly suggesting antimicrobial coatings over disinfectants. These coatings can be used to prevent the spread of harmful bacteria that can lead to compromised immune systems. However, there are health concerns about silver that could limit the demand for these coatings.
Copper
A growing awareness of personal hygiene has led to the use of copper anti microbial coatings, a form of surface coating that inhibits the growth of harmful bacteria. These coatings make use of copper’s antimicrobial capabilities. However, these coatings should be used in conjunction to other methods for hygiene and disinfection. Copper’s antimicrobial properties are permanent and will not wear out.
Antimicrobial touch surfaces made from copper are essential in healthcare facilities as they can prevent the transmission harmful microbes. Some harmful microbes can live for up 30 days on a surface. Copper, however, can quickly inactivate them. In fact, copper is capable of killing 96% of influenza A virus, which can survive for a few days in a non-coated surface.
by Douglas