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用抗菌涂层保持无细菌

包括埃及在内的古代文明, China and India have utilized metals or metal compounds utilizing 铜, 银 and 锌 to combat illnesses caused by microbes, while the ancient Greeks and Egyptians used specific molds and plant extracts to treat infections. 自从SARS的到来, 以及最近的COVID - 19, there is an increasing awareness and use of antimicrobial materials including 抗菌涂料 防止致病微生物的传播. The estimated market value of 抗菌涂料 was over $3.2 Billion USD in 2019 with an estimated adjusted annual growth rate of 10.4%到2026.

抗菌 (AM) agents in the form of 油漆 additives act to either kill microorganisms or to stop their growth. 抗菌 additives in 油漆s can serve as a 油漆 preservative or as an antimicrobial agent in the cured film. Depending on the choice of antimicrobial additives these materials can function to kill or combat the growth of 细菌, 病毒, 涂层表面有真菌、藻类. Control of microbes can be achieved through the use of antimicrobial technologies that keep microorganisms from multiplying or growing, providing hygienic surfaces in hospitals and the food industry and to preserve the integrity of 油漆 films.

This article will focus on antimicrobial additives and approaches to provide antimicrobial functionality in cured films. Applications where AM agents are used in 涂料 to kill or prevent the growth of the following microbes including:

  • 真菌
  • 细菌
  • 藻类
  • 病毒

Most biocides used in 油漆s are migratory as they function by releasing the active ingredient to the surface of the 涂层 when exposed to moisture. Longevity of the AM modified 油漆 film depends on the rate of release of the biocide as the concentration of the active ingredient decreases with time.

Depiction of the release of AM agent in 油漆 with time - Learn how to 用抗菌涂层保持无细菌

The effectiveness of an AM additive in a cured 油漆 is not only dependent upon concentration, 树脂系统, 光泽, 聚氯乙烯, 涂层 surface structure and the environment to which it is exposed.

金属的使用如  (和许多 铜合金 ), 锌 in various forms in 油漆s can be an effective antimicrobial additive. There are several mechanisms by which 银 acts as an antimicrobial. One such example is that 银 ions react with the thiol group in enzymes leading to cell death. The mechanisms through which 铜 acts to destroys cells includes the generation of hydrogen peroxide in the cells, excess 铜 can also bind with proteins resulting in the breakdown of the protein into nonfunctional sections. Zinc pyrithione/2-propynyl butylcarbamate acts both a preservative and as a 真菌cide. The EPA oversees the regulation of antimicrobial agents and materials and determined that 铜合金 kill more than 99.9% of disease-causing 细菌 within just two hours when cleaned regularly. Copper and 铜合金 are unique classes of solid materials as no other solid touch surfaces have permission in the U.S. 来证明人类的健康. 相应的, the EPA has granted antimicrobial registration status to 355 different 铜 alloy compositions.

金属纳米粒子 including PVP and polysaccharide coated 银 nanoparticles, MES-coated 银 and gold have also demonstrated promise as antiviral agents. 铜纳米粒子have demonstrated antimicrobiological activity with Ecoli, fungus and 细菌.

使用certain 季铵硅烷 compounds also provide antimicrobial properties when bonded to a solid surface. Some examples include dimethyloctadecyl (3-trimethoxysilyl propyl) ammonium chloride, alkyldimethylbenzylammonium chloride and didecyldimethylammonium chloride.

More recent literature reveals the impact that surface structure has on antimicrobial properties as a 针像表面 structure formed by the bonding of 3-(trihydroxysilyl) propyldimethyloctadecyl ammonium chloride to the surface to destroy microbes by rupturing their outer membrane as they come in contact with surface spikes.

化学蒸汽沉积 二氧化钛 has photocatalytic activity when exposed to UV light. Its self-cleaning properties are due to its strong oxidizing power that results in anti-细菌l, 抗病毒和抗真菌活性.

超疏水表面 are those with a contact angle normally in the range of 150 degrees or greater. The surface structure is characterized by a needlelike micro-structure coupled with components that provide low surface tension. Such surface structures also have efficacy in reducing the ability of microbes to adhere to the surface thus imparting antimicrobial activity.

For additional information concerning the selection of materials to enhance 疏水ity, 请导航到 www.ulprospector.com (EU).

资源:

  • Organic Coatings, Science and Technology, Frank N. 琼斯等人.al.,威利 & 儿子,2017
  • 探勘者
  • PCI杂志
  • C & 在新闻
  • 新材料科学与技术“,
  • 维基百科
  • 全球市场的见解
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