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Technology for preparing surface-coated modified Ag/ZnO nano composite antibacterial agent

A nano-composite, surface-coated technology, applied in the field of antibacterial materials, can solve the problems of weak photocatalytic ability, application limitations, and ZnO photocatalytic antibacterial ability cannot be reflected.

Inactive Publication Date: 2014-03-26
NANTONG VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although nano-ZnO has photocatalytic antibacterial properties and has been gradually applied in the antibacterial field, due to its weak photocatalytic ability and the need for ultraviolet radiation to reflect the photocatalytic ability, its antibacterial ability is compared with other antibacterial materials such as Ag / Ag + There is still a large gap, so the application is limited, especially in the application of plastics with strong coating effect. Due to the strong coating effect of plastics, the photocatalytic antibacterial ability of ZnO can hardly be reflected.

Method used

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  • Technology for preparing surface-coated modified Ag/ZnO nano composite antibacterial agent
  • Technology for preparing surface-coated modified Ag/ZnO nano composite antibacterial agent
  • Technology for preparing surface-coated modified Ag/ZnO nano composite antibacterial agent

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A process for preparing a surface-coated and modified Ag / ZnO nano composite antibacterial agent includes the following steps:

[0027] 1) Add dispersant sodium hexametaphosphate to distilled water, the mass ratio of distilled water to dispersant is 500:1, stir until completely dissolved;

[0028] 2). Add nano-ZnO powder to the solution of step 1), the mass ratio of distilled water and nano-ZnO powder is 60:1, then first use ultrasonic dispersion for 30 minutes, then add AgNO 3 , Nano ZnO powder and AgNO 3 The mass ratio of the solution is 20:1, adjust the pH value of the solution to 7, and mechanically stir in a water bath at 25℃ for 1h;

[0029] 3) Wash, filter, and then dry in a constant temperature drying oven at 80°C for 3 hours;

[0030] 4) Put it into a box-type resistance furnace and bake at 600℃ for 2h;

[0031] 5) Take out the original powder of Ag / ZnO nanocomposite antibacterial agent, add the original Ag / ZnO antibacterial agent powder in distilled water, and then add s...

Embodiment 2

[0033] A process for preparing a surface-coated and modified Ag / ZnO nano composite antibacterial agent, comprising the following steps:

[0034] 1) Add dispersant sodium hexametaphosphate to distilled water, the mass ratio of distilled water and dispersant is 500:1, stir until completely dissolved;

[0035] 2). Add nano-ZnO powder to the solution of step 1), the mass ratio of distilled water and nano-ZnO powder is 60:1, then first use ultrasonic dispersion for 30 minutes, then add AgNO 3 , Nano ZnO powder and AgNO 3 The mass ratio of the solution is 20:1, adjust the pH value of the solution to 8, and mechanically stir for 2h in a 40℃ water bath;

[0036] 3) Wash, filter, and then dry in a constant temperature drying oven at 120°C for 4 hours;

[0037] 4) Put it into a box-type resistance furnace and roast at 800℃ for 4h;

[0038] 5) Take out the original powder of Ag / ZnO nanocomposite antibacterial agent, add the original Ag / ZnO antibacterial agent powder in distilled water, and then ad...

Embodiment 3

[0040] A process for preparing a surface-coated and modified Ag / ZnO nano composite antibacterial agent includes the following steps:

[0041] 1) Add dispersant sodium hexametaphosphate to distilled water, the mass ratio of distilled water and dispersant is 500:1, stir until completely dissolved;

[0042] 2). Add nano-ZnO powder to the solution of step 1), the mass ratio of distilled water and nano-ZnO powder is 60:1, then first use ultrasonic dispersion for 30 minutes, then add AgNO 3 , Nano ZnO powder and AgNO 3 The mass ratio is 20:1, adjust the pH value of the solution to 7.5, and mechanically stir for 1.5h in a 35℃ water bath;

[0043] 3) Wash, filter, and then dry in a constant temperature drying oven at 100°C for 3.5h;

[0044] 4) Put it into a box-type resistance furnace and bake it at 700℃ for 3h;

[0045] 5) Take out the original powder of Ag / ZnO nanocomposite antibacterial agent, add the original Ag / ZnO antibacterial agent powder in distilled water, and then add sodium laurate...

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Abstract

The invention provides a technology for preparing a surface-coated modified Ag / ZnO nano composite antibacterial agent. The technology comprises the following steps: (1) adding sodium hexametaphoshpate serving as a dispersing agent into distilled water; (2) adding nano ZnO powder into the solution; (3) performing washing and filtering, and then drying the material in a constant-temperature drying oven at the temperature of 80-120 DEG C for 3-4 hours; (4) putting the material into a box type resistance furnace for roasting at the temperature of 600-800 DEG C for 2-4 hours; (5) taking out the material and grinding the material into raw powder of an Ag / ZnO nano composite antibacterial agent, adding the raw powder of the Ag / ZnO antibacterial agent into the distilled water, then adding a sodium laurate coating agent according to the mass ratio of the raw powder and the sodium laurate of 500 to 1, adjusting the pH value of the solution to 5-6, controlling the temperature of a water bath, and mechanically stirring the materials under the temperature range of 25-40 DEG C for 1-2 hours, filtering and drying the materials to obtain the surface-coated modified Ag / ZnO nano composite antibacterial agent. The surface-coated modified Ag / ZnO nano composite antibacterial agent disclosed by the invention is high in antibacterial performance and has a long-time antibacterial characteristic.

Description

Technical field [0001] The invention relates to the field of antibacterial materials, in particular to a process for preparing a surface-coated modified nano composite antibacterial agent. Background technique [0002] Antibacterial materials are new functional materials with bactericidal and antibacterial properties. The core component of antibacterial materials is antibacterial agents. Antibacterial agents are substances that prevent microorganisms such as bacteria and fungi from developing or inhibit their growth. Nano-ZnO not only has the characteristics of high activity, fast photocatalytic antibacterial speed, good thermal stability, long-term effectiveness and harmlessness to the human body, but also has the functions of purification, self-cleaning, and deodorization, so it has become a kind of photocatalysis that has attracted much attention. Type inorganic antibacterial agent. However, there are some problems with the use of photocatalytic antibacterial agents alone. F...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/26A01P1/00C09C1/62C09C1/04C09C3/08C09C3/06C08K9/10C08K3/08C08K3/22C08L23/06C08L23/12
Inventor 李侠张忠来马群锋薛涛
Owner NANTONG VOCATIONAL COLLEGE
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