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Black talc-based antibacterial agent as well as preparation method and application thereof

An antibacterial agent, talc-based technology, applied in the field of black talc-based antibacterial agent and its preparation, can solve the problems of high manufacturing cost, complicated manufacturing process and curing process of antibacterial coating, reduce production cost, realize high-value utilization, Antibacterial effect is remarkable

Active Publication Date: 2022-03-11
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the manufacturing process and curing process of antibacterial coatings are more complicated than ordinary coatings, their manufacturing costs are high

Method used

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  • Black talc-based antibacterial agent as well as preparation method and application thereof
  • Black talc-based antibacterial agent as well as preparation method and application thereof
  • Black talc-based antibacterial agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment prepares activated black talc Talc-7

[0045] Sieve the raw ore of Guangfeng black talc, the fineness is required to be 200 mesh, and the underscreen is temporarily called black talc. Weigh 5g of black talc, calcinate it in a muffle furnace at 700°C for 2h, lower the temperature slowly, and take it out from the muffle furnace after the color changes from black to off-white. Calcined in air atmosphere, the initial temperature is 20°C, the heating time is 68min, the holding time is 2h, and the cooling time is 150min. Labeled Talc-7.

Embodiment 2

[0047] This embodiment prepares activated black talc Talc-9

[0048] Sieve the black talc raw ore, the fineness is required to be 200 mesh, and the underscreen is tentatively called black talc. Weigh 5g of black talc, calcinate it in a muffle furnace at 900°C for 2h, lower the temperature slowly, and take it out from the muffle furnace after the color changes from black to off-white. Calcined in an air atmosphere, the initial temperature is 20°C, the heating time is 88min, the holding time is 2h, and the cooling time is 200min. Labeled Talc-9.

[0049] The calcination temperature in Examples 1 and 2 was changed, and activated black talc was prepared by calcination at different temperatures.

[0050] figure 1 Calcining black talc at different temperatures (100°C-1000°C), it can be seen that the whiteness of black talc is significantly improved, of which black talc appears gray at 500°C-800°C, and white at 900°C-1000°C.

[0051] Such as figure 2 As shown, as the temperatur...

Embodiment 3

[0054] This embodiment prepares black talc antibacterial material 5%ZnO / Talc-7

[0055] Weigh 0.14g Talc-7, 0.1785g Zn(NO 3 ) 2 ·6H 2O, added to 90ml of ethanol, stirred ultrasonically at room temperature for 20 minutes to form a uniform and stable suspension, and heated the suspension to 75°C. Weigh 0.12g of granular NaOH, add it into 45ml of ethanol, and stir ultrasonically for 15min at room temperature to form a clear solution. The NaOH solution was added dropwise to the suspension for 60 min. After the dropwise addition, the solution continued to stir for 60 min, and was centrifugally filtered, and the filter cake was washed three times with water to remove surface residual Zn(NO 3 ) 2 ·6H 2 O and NaOH, placed in an oven at 60°C for 12 hours to obtain Zn(OH) 2 / Talc-7 composite material, further Zn(OH) 2 / Talc-7 composite material was calcined in a muffle furnace at 400°C for 4h, which was recorded as 5%ZnO / Talc-7.

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Abstract

The invention discloses a black talc-based antibacterial agent as well as a preparation method and application thereof. The black talc-based antibacterial agent is activated black talc of which the surface is loaded with nano zinc oxide particles. The invention relates to a preparation method of a black talc-based antibacterial agent. The preparation method comprises the following steps: S1, stirring a certain amount of activated black talc, zinc nitrate hexahydrate and ethanol to obtain turbid liquid; s2, dropwise adding an ethanol solution of sodium hydroxide into the turbid liquid, carrying out stirring reaction, and carrying out solid-liquid separation, washing and drying to obtain zinc hydroxide / black talc; and S3, calcining the zinc hydroxide / black talc at a certain temperature to obtain the zinc oxide / black talc binary composite antibacterial agent. The black talc which is rich in reserves, easy to obtain and low in cost is adopted as the raw material of the antibacterial agent, the production cost of the antibacterial agent is reduced, meanwhile, high-value utilization of the black talc is achieved, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a black talc-based antibacterial agent and its preparation method and application. Background technique [0002] Inorganic antibacterial agents are widely used in construction, medical equipment, coatings, plastic products, textiles and other fields due to their good temperature resistance, broad antibacterial spectrum, long effective antibacterial time, no drug resistance, and high reliability. Nano-zinc oxide, nano-silver and silver ions are common inorganic antibacterial agents, but easy to agglomerate and high price are the biggest problems in the application of such antibacterial agents. [0003] In addition, antibacterial coatings can effectively prevent the spread of harmful microorganisms and inhibit the growth and reproduction of mold bacteria. Under the current background of health care and environmental protection, the development and application of ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N59/00A01P3/00A01P1/00C09D163/00C09D5/14
CPCA01N59/16A01N59/00C09D163/00C09D5/14C08K2003/2296C08K2201/011C08K3/22C08K9/12C08K3/34Y02A50/30
Inventor 杨华明吴海燕孟宇航
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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