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Slowly-released silver oxide (AgO) microcapsule antimicrobial and preparation method thereof
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A technology of microcapsules and particle size, applied in botany equipment and methods, fungicides, biocides, etc., can solve the problems of inability to function for a long time and affect the service life of AgO, achieve good thermodynamic stability and maintain antibacterial effect , the effect of simple operation
Inactive Publication Date: 2013-06-12
SICHUAN UNIV
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Abstract
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Problems solved by technology
This seriously affects the service life of AgO, so that it can only play an antibacterial effect in a short period of time, but not for a long time.
Method used
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Embodiment 1
[0027] The preparation method of AgO microcapsules of this embodiment includes the following steps:
[0029] (2) Weigh 0.3 g of AgO nano powder, add it to the polystyrene solution prepared in step (1), add 2% vol of emulsifier Span-80, and ultrasonicate for 30 minutes to form emulsion A;
[0030] (3) Drop the above emulsion A into 500ml of deionized water at a speed of 2ml / min, while stirring with an electric stirrer at a stirring speed of 1000r / min. After the addition is complete, continue to stir and slowly heat to 60°C After 1h, the microcapsules were obtained.
[0031] (4) Filter the above-mentioned microcapsules, then wash them with deionized water, and dry them for later use.
[0032] The AgO microcapsules prepared in this embodiment have a spherical shape, a smooth and uniform surface, a black color, and an average particle size of about 86 μm.
Embodiment 2
[0034] The preparation method of AgO microcapsules of this embodiment includes the following steps:
[0035] (1) Take 6g of polystyrene (wall material) and add 60ml of dichloromethane to dissolve to form a polystyrene solution;
[0036] (2) Weigh 0.6 g of AgO nano powder, add it to the polystyrene solution prepared in step (1), and then add 1% vol of emulsifier Span-80, sonicate it for 30 minutes to form emulsion A;
[0037] (3) Drop the above emulsion A into 500ml of deionized water at a speed of 2ml / min, while stirring with an electric stirrer at a stirring speed of 500r / min. After the addition is complete, continue to stir and slowly heat to 60℃ After 1h, the microcapsules were obtained.
[0038] (4) Filter the above-mentioned microcapsules, then wash them with deionized water, and dry them for later use.
[0039] The AgO microcapsules prepared in this embodiment have a spherical shape, a smooth and uniform surface, a black color, and an average particle size of about 480 μm.
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Abstract
The invention relates to a microcapsule and a preparation method thereof. The invention aims at providing a silver oxide (AgO) microcapsule having a slowly-released effect and a preparation method thereof. The AgO microcapsule comprises core AgO nano particles and a wall material. The preparation method comprises the following steps that: (1) the wall material is added into methylene dichloride to form solution A; (2) AgO nano powder is added into the solution A, and then emulsifier is added into the solution to form emulsified solution B; (3) the emulsified solution B is added into a continuous phase to be blended and heated, and organic solvent is evaporated; and (4) a product in step (3) is filtered, washed and dried to obtain the AgO microcapsule. Due to the adoption of the slowly-released AgO microcapsule antimicrobial, the AgO nano particles can be isolated from the external environment, so the AgO nano particles are free from being influenced by the external environment; and atthe same time AgO is slowly released for a long time, and the slowly-released AgO microcapsule antimicrobial can be used in the broad-spectrum high-efficient lasting antibiotic field.
Description
technical field [0001] The invention relates to a microcapsule and a preparation method thereof, belonging to the field of new materials. Background technique [0002] Antimicrobial agents refer to chemical substances that can keep the growth or reproduction of certain microorganisms (bacteria, fungi, yeast, algae, viruses, etc.) below the necessary level within a certain period of time. Antibacterial agents are a new class of additives with antibacterial and bactericidal properties. Among them, the antibacterial properties of silver ions and their compounds have been widely studied. [0003] The antibacterial mechanism of silver ions and their compounds: the contact reaction of silver ions causes the destruction of common components of microorganisms or produces dysfunction. When a small amount of silver ions reaches the microbial cell membrane, because the latter is negatively charged, the two are firmly adsorbed by Coulomb gravity. The silver ions penetrate the cell wal...
Claims
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Application Information
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