Application and development of antibacterial agents for non-woven filter materials
As an important filter material, non-woven fabrics play a key role in the fields of air purification, medical protection, health products and so on. However, with the increasing attention to health and environmental hygiene, higher requirements have been put forward for the antibacterial properties of non-woven filter materials. Therefore, the application of antibacterial agents in non-woven filter materials has become a hot spot of current research.
Overview of non-woven filter materials
Non-woven fabric, also known as nonwoven fabric, is a kind of fabric that does not need to be spun and woven, mainly composed of fibers directly bonded by physical, chemical or mechanical methods. Non-woven fabrics have the advantages of high filtration efficiency, low resistance, large dust capacity, long service life, etc., and are widely used in air filtration, liquid filtration, medical protection, sanitary products and other fields.
In the field of air filtration, non-woven filter materials can effectively remove dust, bacteria, viruses and other harmful substances in the air and improve air quality. However, the traditional non-woven filter materials have shortcomings in antimicrobial performance, which is easy to breed bacteria and other microorganisms, affecting the filtration effect and service life.
Second, the application of antibacterial agents in non-woven filter materials
In order to improve the antibacterial properties of non-woven filter materials, researchers have developed a variety of antibacterial agents and applied them to non-woven filter materials. The main function of antibacterial agents is to kill or inhibit the growth of microorganisms by destroying the cell wall and membrane of microorganisms such as bacteria or inhibiting their metabolic activities.
Inorganic antibacterial agent
Inorganic antibacterial agents mainly include silver ion, zinc oxide, titanium dioxide and so on. Among them, silver ion antibacterial agents have attracted much attention because of their broad-spectrum antibacterial properties, high efficiency and safety. Silver ions can penetrate the bacterial cell wall, bind to the protein in the bacteria, make it inactive, so as to achieve bactericidal effect. In addition, silver ions are persistent and stable, are not easily oxidized or reduced, and can maintain antibacterial properties for a long time.
Organic antibacterial agents
Organic antimicrobials mainly include quaternary ammonium salts, halogenated phenols, quaternary ammonium salts of organosilicon, etc. These antibacterial agents have the characteristics of quick effect and strong bactericidal ability, but there may be some problems such as irritation to human skin, easy decomposition and failure. Therefore, when selecting organic antimicrobials, it is necessary to consider their antibacterial properties, safety and stability.
Natural antibacterial agent
Natural antimicrobials are mainly derived from organisms, such as chitosan and plant extracts. These antimicrobials have the advantages of good biocompatibility and non-toxic side effects, but the antibacterial effect may be relatively weak. Therefore, in practical applications, natural antimicrobials usually need to be combined with other antimicrobials to improve their antibacterial properties.
Third, the application effect of antibacterial agents in non-woven filter materials
The antibacterial properties of non-woven filter materials can be significantly improved by using antibacterial agents. The experiment shows that the non-woven filter material with antibacterial agent can effectively inhibit the growth and reproduction of bacteria and other microorganisms, and reduce the risk of secondary pollution in the filtration process. At the same time, antibacterial agents can also extend the service life of non-woven filter materials and reduce the frequency and cost of replacement.
In summary, the application of antibacterial agents in non-woven filter materials is of great significance. By selecting the right antibacterial agent and optimizing its application process, the antibacterial performance and service life of non-woven filter materials can be significantly improved, and a safer and more reliable solution can be provided for air purification, medical protection and other fields.
