Rare earth-silver nanocluster antibacterial agent and preparation method thereof
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A technology of silver nanocluster and antibacterial agent is applied in the field of rare earth-silver nanocluster antibacterial agent and its preparation, which can solve the problems of poor weather resistance, easy reduction, affecting application, etc. Effect
Pending Publication Date: 2021-04-23
HUAQIAO UNIVERSITY +1
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[0003] At present, silver-based antibacterial agents are widely used, but silver-based antibacterial agents have significant weaknesses, such as high manufacturing co...
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Embodiment 1
[0040] The preparation method of the rare earth-silver nanocluster antibacterial agent of the present embodiment comprises the following steps:
[0041] 1) Add 8.2g of sodium tungstate to a beaker filled with 20mL of water and stir evenly;
[0042] 2) Adjust the pH value of the above solution to 7.4-7.5 with acetic acid to prepare solution A;
[0043] 3) Dissolve 1.14g of terbium nitrate in 2mL of aqueous solution to make solution B;
[0044] 4) slowly drop solution B into solution A, and heat to 85 degrees Celsius for 6 hours, and obtain solid powder C after cooling, which is the core of rare earth polyacid;
[0045] 5) Add the filtered and washed solid powder C to a mixed solution of acetonitrile and methanol with a volume ratio of 1:2 to prepare solution D;
[0046] 6) Add 20 g of silver nitrate and 10 g of tert-butylacetylene to 100 mL of acetonitrile and water in a volume ratio of 1:1 to form a precipitate E, which is a shell of silver tert-butyl acetylene;
[0047]7) ...
Embodiment 2
[0049] The preparation method of the rare earth-silver nanocluster antibacterial agent of the present embodiment comprises the following steps:
[0050] 1) Add 5g of sodium tungstate to a beaker filled with 10mL of water, and stir well;
[0051] 2) Adjust the pH value of the above solution to 7.4-7.5 with formic acid to prepare solution A;
[0052] 3) Dissolve 0.5g of terbium chloride in 2mL of aqueous solution to make solution B;
[0053] 4) slowly drop solution B into solution A, and heat to 90 degrees Celsius for 8 hours to react, and obtain solid powder C after cooling, which is the core of rare earth polyacid;
[0054] 5) Add the filtered and washed solid powder C to 20 mL of acetonitrile and methanol in a volume ratio of 1:2 to prepare solution D;
[0055] 6) Add 10 g of silver nitrate and 5 g of tert-butylacetylene to 50 mL of acetonitrile and water at a volume ratio of 1:1 to form a precipitate E, which is a shell of silver tert-butyl acetylene;
[0056] 7) Add E to...
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Abstract
The invention discloses a novel rare earth-silver nanocluster antibacterial agent and a preparation method thereof. According to the invention, rare earth and silver elements with antibacterial properties are combined together to form the rare earth-containing silver nanocluster. A novel rare earth-silver nanocluster antibacterial agent is developed by utilizing the synergistic effect of the rare earth and silver elements. The antibacterial agent is a microcrystalline product, the microstructure of the antibacterial agent is analyzed by an X single crystal diffractometer, and a certain contribution can be made to the research of the structure-activity relationship of the rare earth element antibacterial mechanism. The inhibition zone method test shows that the antibacterial property of the nanocluster on common bacteria and fungi is equivalent to that of a common antibacterial agent gentamycin/amphotericin. The prepared rare earth-silver nanocluster antibacterial agent can be applied to various fields of antibacterial macromolecules, antibacterial coatings, antibacterial fabrics and the like, and then is used for manufacturing ceramic bathroom accessories, fresh air systems, indoor decoration coatings, clothes and other products.
Description
technical field [0001] This project belongs to the technical field of antibacterial materials, and in particular relates to a rare earth-silver nano-cluster antibacterial agent and its preparation method. Background technique [0002] Many microorganisms are the pathogens of many diseases of humans, animals and plants, and they always threaten the survival and development of human beings themselves. In 2020, a new type of coronavirus caused a large area of pneumonia infection around the world. Epidemics such as influenza, Ebola, SARS coronavirus and Middle East respiratory syndrome once caused panic all over the world. This has left people with a lot of thinking, and public health has attracted great attention from the government and people. For the healthy development of human beings, it has become a consensus to pay attention to improving the public environment and personal hygiene. In 1935, German C. Domark used quaternary ammonium salts to treat military uniforms t...
Claims
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