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Inorganic coating anti-bacterial fiber and preparation thereof

An antibacterial fiber and inorganic coating technology, which is applied in the field of inorganic antibacterial agents and their preparation, can solve the problems of low utilization rate of sunlight, affect the appearance of white or light-colored products, and have no antibacterial performance, and achieve high catalytic activity.

Inactive Publication Date: 2008-11-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver ions in silver-based antibacterial materials have strong antibacterial activity, but the chemical properties of silver ions are relatively active, and they are more sensitive to heat and light, especially after being irradiated by ultraviolet rays, they are easily reduced to black elemental silver, which affects white or light-colored products. Appearance, its stability issues have not been effectively and finally resolved
However, photocatalysts have the following disadvantages: ① most photocatalysts have a wide band gap, and the recombination of electron-hole pairs reduces the catalytic efficiency of photocatalysts; ② only show photocatalytic activity in the ultraviolet region, and the ultraviolet light energy in sunlight It only accounts for about 5%, while visible light energy accounts for more than 40%, the utilization rate of sunlight is very low, and the cost is high
And as an environmental purification material, if it needs to be exposed to ultraviolet light, its application in the room will be limited.
③ The recovery of photocatalyst has not been effectively solved
The study found that the ZnO / activated carbon composite system has a strong antibacterial effect, and the antibacterial activity increases significantly with the increase of ZnO content in the system (52%-65%) and the decrease of carbonization temperature, while the activated carbon without ZnO has no antibacterial properties.

Method used

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  • Inorganic coating anti-bacterial fiber and preparation thereof
  • Inorganic coating anti-bacterial fiber and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: AgNO 3 , polyvinylpyrrolidone and ammonia water are all analytical reagents

[0029] Preparation of silver modified T-ZnOw colloidal solution: 80g AgNO 3Dissolve in 1L of deionized water to obtain a silver nitrate solution with a silver concentration of 50g / L, add 10ml of a 0.0025mol / L polyvinylpyrrolidone solution under stirring, and then add ammonia water dropwise until the pH value is 8 to obtain silver-containing ions colloidal solution. Take 1 L of the colloidal solution containing silver ions above, and add 100 g of T-ZnOw to the colloidal solution under ultrasonic conditions, so that T-ZnOw is uniformly dispersed in the sol system.

[0030] Fiber-loaded modified T-ZnOw: Activated carbon fibers were degummed by sintering at 800°C for 10 minutes under the protection of nitrogen, then soaked in an aqueous solution system under ultrasonic conditions, and then dried at 120°C, and the obtained clean activated carbon fibers were placed in an ultrasonic stat...

Embodiment 2

[0031] Embodiment 2: Titanium sulfate, sodium dodecylbenzenesulfonate, sodium carbonate are all analytical reagents

[0032] Preparation of titanium dioxide modified T-ZnOw colloidal solution: Dissolve 200g of titanium sulfate in 1L of deionized water to obtain a titanium sulfate solution with a titanium concentration of 40g / L, add 0.0025mol / L dodecylbenzenesulfonate under stirring Sodium carbonate solution 5ml, then dropwise add 0.1mol / L sodium carbonate solution until the pH value is 2 to obtain a titanium-containing colloidal solution. Take 1L of the above titanium-containing colloidal solution, and add 80 g of T-ZnOw to the colloidal solution under ultrasonic conditions, so that T-ZnOw is uniformly dispersed in the sol system.

[0033] Carbon fiber loaded modified T-ZnOw: The carbon fiber is degummed by sintering at 750°C for 10min under the protection of nitrogen, and then soaked in an aqueous solution system under ultrasonic conditions, and then dried at 120°C. The modi...

Embodiment 3

[0034] Example 3: Fe(NO 3 ) 3 9H 2 O, polyethylene glycol and ammonia water are all analytical reagents

[0035] α-Fe 2 o 3 The preparation of modified T-ZnOw colloidal solution: 150gFe(NO 3 ) 3 9H 2 O is dissolved in 1L deionized water to obtain iron concentration and is the ferric nitrate solution of 60g / L, adds 0.0025mol / L polyethylene glycol solution 8ml under the condition of stirring, then drips ammoniacal liquor to pH value is 7, obtains containing Colloidal solution of iron. Take 1 L of the above iron-containing colloidal solution, and add 120 g of T-ZnOw to the colloidal solution under ultrasonic conditions, so that T-ZnOw is uniformly dispersed in the sol system.

[0036] Aramid fibers loaded with modified T-ZnOw: Aramid fibers are soaked in an aqueous solution system under ultrasonic conditions, and then dried at 120°C, and the resulting clean aramid fibers are put into Soak the silk in the solution for 3 minutes, load the modified T-ZnOw on the aramid fibe...

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PUM

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Abstract

The invention discloses an inorganic antibacterial fiber of a coating layer and a preparation method thereof. The invention leads four-needle zinc oxide whisker that is blended with silver, ferric oxide, titanium dioxide or the mixture of the silver, the ferric oxide and the titanium dioxide to be modified, and expands the responsiveness of the four-needle zinc oxide whisker in the field of visible lights. The four-needle zinc oxide whisker or the modified four-needle zinc oxide whisker are loaded onto the fiber, and due to the special space structure, the four-needle zinc oxide whisker has strong holding power to the fiber and can be well loaded onto the fiber, thus well combining the high catalytic activity of the four-needle zinc oxide whisker and the high specific surface property of the fiber, greatly improving the catalytic efficiency of optical catalysts, and simultaneously solving the recycling problem of the optical catalysts.

Description

technical field [0001] The invention relates to an inorganic antibacterial agent and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] With the extensive use of antibiotics and chemical drugs, microorganisms represented by bacteria and viruses have launched more and more violent attacks on humans, and caused more and more serious consequences. With the rapid development of the national economy and people's living standards It has become an urgent problem to be solved, improving living conditions and building an environmentally friendly and healthy living environment. Inorganic antibacterial materials have become a hot spot in the research of antibacterial agents because of their advantages such as broad-spectrum antibacterial, corrosion resistance, wide application range, and safe use. . [0003] There are two main types of inorganic antibacterial agents currently in use: dissolution-type inorganic antibact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/44B01J23/60D06M11/46B01J23/06D06M11/49B01J31/28B01J31/38B01J35/06A01N59/16A01N59/00D06M101/40D06M101/36D06M101/32
Inventor 黄小忠杜作娟黎炎图张承辉
Owner CENT SOUTH UNIV
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