Experts interpret that antibacterial coatings are harmful?

The living environment is getting better and better, and people's requirements for the indoor environment are increasing.
For the choice of indoor coatings, more attention is paid to health and functionality.
Anti-formaldehyde, anti-static, anti-mildew, and antibacterial coatings are sought after.

Bacteria are everywhere in life.
Antibacterial coatings can provide additional protection against bacteria, but are antibacterial coatings really safe? How much do you know about antibacterial coatings?Is it possible that antibacterial coatings do more harm than good?In a new study from Northwestern University in the United States, researchers tested common household bacteria on drywall samples coated with antibacterial synthetic latex paint.
Within 24 hours, all bacteria died, except for Bacillus timonensis, a spore-forming bacteria.
Most bacilli usually live in the soil, but many bacilli exist in indoor environments.
"If you attack bacteria with antibacterial chemicals, they will defend themselves," said Erica Hartman of Northwestern University, who led the research.
"Bacillus is usually harmless, but by attacking it, you may prompt it to produce more antibiotic resistance.
"Bacteria thrive in warm and humid environments, so most die on dry and cold indoor surfaces .
This makes Manteha question whether antibacterial coatings are needed, which may only cause bacteria to become stronger.
Spore-forming bacteria, such as Bacillus, protect themselves by dormant for a period of time.
During dormancy, they are highly resistant even under the harshest conditions.
After these conditions improve, they will be reactivated.
Hartman, an assistant professor of civil and environmental engineering at Northwestern University's McCormick School of Engineering, said: "When it is in a spore state, you can fight it with everything you have, and it can still survive.
" "We should be wise.
Use antibacterial products to ensure that we don’t expose more harmless bacteria to substances that might make them harmful.
” The study was published online April 13 in the journal “Indoor Air”.
One problem with antimicrobial products (such as these coatings) is that they are not tested against the more common bacteria.
Manufacturers test how more pathogenic bacteria (such as Escherichia coli or Staphylococcus) can survive, but largely ignore the bacteria that people (and the products they use) are more likely to encounter.
"E.
coli is like the'laboratory mouse' of the microbial world," Hartman said.
"Its environment is less than people think.
We want to see how real indoor bacteria react to antibacterial surfaces because they behave differently from E.
coli.
" From   this point of view, antibacterial coatings may be harmful if used indiscriminately.
More than profitable results.
It is understood that antibacterial coatings can be divided into two levels according to the degree of antibacterial effect: I and II.
Class I is suitable for places with high antibacterial performance requirements, and Class II is suitable for places with antibacterial performance requirements.
The industry standard HG/T3950-2007 antibacterial coatings has clear requirements for various indicators.
The use of antibacterial coatings should choose a suitable place to choose coating products reasonably to prevent more harm than good.
  The development of antibacterial coatings is one of the development directions of the coatings industry.
It is understood that the current antibacterial agents for coatings mainly include natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents.
With the advancement of technology, new types of antibacterial coatings will inevitably appear, which have good antibacterial functions but will not cause harm, eliminating Professor Hartman's concerns.