The Importance of Antibacterial Additives in Waterborne Nano Antibacterial and Antifungal Coatings

As we all know, in the water-based nano antibacterial and antifungal coatings, the effect of using inorganic oxides to coat the silver ion antibacterial agent is relatively good, and the antibacterial effect is relatively long. With the gradual improvement of people's living standards and the growing voice for environmental protection, in order to meet the environmental requirements of people's daily life, water-based nano-antibacterial and anti-mildew coatings appear in the market.

Its coating film has certain antibacterial properties and can resist the mold adhering to the mucous membrane. People usually use various chemical and physical means for sterilization work, such as the use of classified preparations, peroxygen preparations, high pressure steam, ultraviolet rays, ozone, etc. etc. Although these sterilization methods have their own advantages in the application field, there are also some disadvantages that cannot be ignored. It is irritating, the operation process is complicated, the cost of investment is relatively high, and it is not suitable for large-scale use. Compared with the conventional physical and chemical disinfection methods, the use of water-based nano-antibacterial and mildew-proof coatings has a long time period, and it is not only economical and convenient.

This water-based nano-antibacterial and anti-mildew coating is comparable to ordinary powder coatings in terms of film properties, secondary coating properties, chemical resistance, and coating adaptability. There will be blackening, which is very suitable for white paints, and it is very suitable for people's needs for building paints.

The existence of antibacterial additives in the water-based nano antibacterial moldy paint can endow the paint with longer antibacterial and bacteriostatic ability, high action force, wide application and long validity period. Antibacterial agents can be roughly divided into three series: organic, inorganic and natural. Generally, organic antibacterial agents have poor heat resistance and good discoloration resistance, but are easy to be hydrolyzed and have a short service life.

There are not many varieties of natural antibacterial agents, and they have not yet reached a large-scale market. At present, the research and development of antibacterial agents at home and abroad mainly focuses on inorganic antibacterial agents such as silver ions, copper ions, and lead ions.

In the water-based nanometer antibacterial and antifungal coating, active oxygen divalent silver ions have inhibitory and killing effects on Gram-positive bacteria, Gram-negative bacteria, molds and yeasts. Molecular silver oxide is positively charged and adsorbs negatively charged bacteria. When the adsorbed silver ions reach a certain concentration, they combine with bacterial proteins to form protein silver, and the normal tissues of bacteria are destroyed and die.

Therefore, the inorganic antibacterial agent represented by silver has high safety, good antibacterial durability, and is suitable for a wide range of strains. .