Halloysite Ag-carrying antibacterial agent and preparation method thereof
An antibacterial agent, a technology of stone activity, applied in the field of inorganic silver-carrying antibacterial agent and its preparation, can solve the problems of unfavorable antibacterial agent antibacterial effect, slow release effect, weak antibacterial agent and the like, so that the antibacterial performance is not affected. , good slow release, good antibacterial effect
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[0025] Example 1
[0026] A method for preparing halloysite silver-loaded antibacterial agent, which comprises the following steps:
[0027] (1) Halloysite activation: add halloysite with a purity of about 80wt% into a 5wt% nitric acid solution, stir and activate at room temperature, and the solid-liquid ratio of the reaction system is 10% by mass. Quality / quality of dilute nitric acid solution)×100%=10%};
[0028] (2) Drying: dewatering the activated halloysite by centrifugation and drying to obtain activated and dried halloysite;
[0029] (3) Load: prepare 3wt% silver nitrate solution, adjust the pH of silver nitrate solution to 5 with dilute nitric acid, add activated and dried halloysite, stir at 40℃ for 2h, the solid-liquid ratio of the reaction system is in mass percentage 20%;
[0030] (4) After the reaction is completed, the product is centrifuged and filtered, the filter cake is washed, and then dried to obtain halloysite silver-carrying broad-spectrum antibacterial agent.
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Example Embodiment
[0033] Example 2
[0034] A method for preparing halloysite silver-loaded antibacterial agent, which comprises the following steps:
[0035] (1) Halloysite activation: add halloysite with a purity of about 80 wt% and a particle size of 200 mesh into a 5 wt% nitric acid solution, stir and activate at room temperature for 0.5h, and the solid-liquid ratio of the reaction system is 10% by mass %;
[0036] (2) Drying: dehydrate the activated halloysite by centrifugation, wash to neutrality, and dry at 95°C to obtain activated and dried halloysite;
[0037] (3) Load: Prepare 3wt% silver nitrate solution with deionized water, adjust the pH of the silver nitrate solution to about 6 with 10wt% dilute nitric acid, add activated and dried halloysite, and stir for 2h at 40°C. The solid-liquid ratio of the reaction system is 20% by mass percentage;
[0038] (4) After the reaction is completed, the product is centrifuged and filtered, and the filter cake is washed three times with deionized water, ...
Example Embodiment
[0040] Example 3
[0041] A method for preparing halloysite silver-loaded antibacterial agent, which comprises the following steps:
[0042] (1) Halloysite activation: add halloysite with a purity of about 95wt% and a particle size of 250 mesh into a 1wt% nitric acid solution, stir and activate at room temperature for 1h, and the solid-liquid ratio of the reaction system is 5% by mass;
[0043] (2) Drying: dewatering the activated halloysite by centrifugation, washing to neutrality, and drying at 100°C to obtain activated and dried halloysite;
[0044] (3) Load: Prepare 0.5wt% silver nitrate solution with deionized water, adjust the pH of the silver nitrate solution to about 6 with 10wt% dilute nitric acid, add activated and dried halloysite, and stir at 60℃ for 0.5 h, the solid-liquid ratio of the reaction system is 5% by mass;
[0045] (4) After the reaction is completed, the product is centrifuged and filtered, and the filter cake is washed three times with deionized water, and then...
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