The importance of antibacterial additives in waterborne nano antibacterial and anti-mold coatings

It is well-known that in waterborne nano-antibacterial and anti-mildew coatings, the effect achieved by using inorganic oxides to encapsulate silver ion antibacterial agents is relatively good, and the antibacterial efficacy lasts for a long time. With the gradual improvement of people's living standards and the increasing demand for environmental protection, waterborne nano-antibacterial and anti-mildew coatings have appeared in the market to meet people's daily environmental requirements.

Its coating film has certain antibacterial properties and can resist mold adhering to surfaces. People usually use various chemical and physical methods for sterilization, such as classified peroxide preparations, high-pressure steam, ultraviolet light, ozone, and so on. Although these sterilization methods have their respective advantages in their application fields, they also have some unavoidable disadvantages, such as short efficacy, easy volatilization, emission of unpleasant odors, and even skin irritation. The operation process is relatively complex, requires high input costs, and is not suitable for large-scale use. Compared with conventional physical and chemical disinfection methods, waterborne nano-antibacterial and anti-mildew coatings have a longer effective period and are both economical and convenient.

This waterborne nano-antibacterial and anti-mildew coating is comparable to ordinary powder coatings in terms of film physical properties, re-coating physical properties, chemical resistance, and application adaptability and stability. Furthermore, it will not blacken even in high-temperature environments, making it very suitable for white coatings and well-suited to people's demands for building coatings.

The presence of antibacterial additives in waterborne nano-antibacterial and anti-mildew coatings can provide the coating with longer-lasting antibacterial and bacteriostatic capabilities, high effectiveness, broad applicability, and long validity. Antibacterial agents can generally be divided into three major series: organic, inorganic, and natural. Generally, organic antibacterial agents have poor heat resistance, and although they have good discoloration resistance, they are easily hydrolyzed and have a short service life.

There are few varieties of natural antibacterial agents, and they have not achieved market scale. Currently, the development of antibacterial agents at home and abroad mainly focuses on inorganic antibacterial agents such as silver ions, copper ions, and zinc ions.

In waterborne nano-antibacterial and anti-mildew coatings, active oxygen divalent silver ions have inhibitory and killing effects on Gram-positive bacteria, Gram-negative bacteria, molds, and yeasts. Molecular silver oxide, being positively charged, adsorbs negatively charged bacteria. When the adsorbed silver ions reach a certain concentration, they combine with bacterial proteins to form silver proteinate, destroying the bacteria's normal tissues and leading to their death.

Therefore, inorganic antibacterial agents represented by silver are highly safe, have good antibacterial persistence, and are applicable to a wide range of bacterial species. They are widely used by researchers and developers, and their application in waterborne nano-antibacterial and anti-mildew coatings has certain advantages.