Nano antimicrobial powder body with shell powder as carrier and method for preparing the same

A technology of nano-antibacterial powder and shell powder, which is applied in the field of nano-materials, can solve the problems of affecting material performance and processing performance, high price of nano-silver antibacterial products, and poor antibacterial durability of materials, so as to achieve good compatibility and great environmental protection significance , High antibacterial efficiency

Inactive Publication Date: 2008-04-02
GUANGDONG OCEAN UNIVERSITY
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  • Abstract
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AI Technical Summary

Problems solved by technology

Tests have shown that since zeolite and montmorillonite are natural minerals, pretreatment is difficult, difficult to disperse, and poor compatibility with materials, which will affect the performance and processing performance of the material itself. The antibacterial durability of the prepared material is poor, and the amount of antibacterial agent is large. Use is also limited
In recent years, the self-assembly and loading synthesis technology of nanoparticles with the help of the inner and outer surfaces of porous materials has become a research hotspot in the field of nanomaterials. Chinese invention patent 01110767 "anti-aggregation broad-spectrum antibacterial nano-silver powder and industrial production process" is published An anti-aggregation broad-spectrum antibacterial nano-silver micropowder and an industrialized production process were developed to firmly attach nano-silver micropowder to some natural porous plant materials, making the price of nano-silver antibacterial products relatively high

Method used

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  • Nano antimicrobial powder body with shell powder as carrier and method for preparing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1), weigh 0.102gAgNO 3 , dissolved in 100ml deionized water to obtain a concentration of 0.006mol L -1 AgNO 3 solution; (2), take by weighing 2.0g dry oyster shell powder, put into AgNO 3 Soak in the solution, stir properly or use ultrasonic treatment with a frequency of 40kHz to soak the oyster shell powder thoroughly; (3), centrifuge to separate AgNO 3 solution and oyster shell powder, decanting the upper AgNO 3 After the solution, immediately add an appropriate amount of deionized water, shake well and then centrifuge immediately. The cleaning process should be fast in this way, so as to avoid the AgNO adsorbed in the oyster shell powder 3 Eluted out; (4), dry the sample obtained from the above separation at about 80-100°C (spray drying can be used in batches); (5), crush the dried sample with an appropriate air flow; (6), dry the sample Place it thinly in the container, irradiate the sample with sunlight for 30-60min, during the illumination process, properly t...

Embodiment 2

[0023] (1) Weigh 0.102g AgNO 3 , dissolved in 100ml deionized water to obtain a concentration of 0.006 mol L -1 AgNO 3 solution; (2), take by weighing 2.0g dry oyster shell powder, put into AgNO 3 Soak in the solution, stir properly or use ultrasonic treatment with a frequency of 40kHz to thoroughly soak the oyster shell powder; (3), separate AgNO 3 solution and oyster shell powder, decanting the upper AgNO 3 After the solution, immediately add an appropriate amount of deionized water, shake well and then centrifuge immediately, and then wash it again with deionized water according to this method. The cleaning process should be fast to avoid the AgNO adsorbed in the oyster shell powder. 3 Wash it out; (4), add appropriate amount of formaldehyde to soak the sample, and the soaking time is about 1 hour, and the formaldehyde makes the AgNO adsorbed in the oyster shell powder 3 Ag in + Reduction to form nano-silver particles; (5), centrifugation is used again, and the sample ...

Embodiment 3

[0025] Mix the oyster shell powder carrier into 1L of 20% suspension, add 1.4mol·L -1 Silver nitrate aqueous solution 80ml, stirred at 60°C or treated with ultrasonic waves with a frequency of 40kHz for 1-3 hours, then added 1mol L -1 The reducing agent oxalic acid solution is 30-100mL, reacted at 60-80°C for 2-3 hours, the product is washed, dried and jet-pulverized to prepare the nano antibacterial powder of the present invention, and then sealed and stored. The experimental results are shown in Table 1.

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Abstract

The invention discloses a nanometer antibacterial powder body which takes shell powder as a carrier and a preparation method of the antibacterial powder body. The antibacterial powder body includes 80-98 percent (weight) of shell powder carrier (optimum selection of 85-97 percent) and 2-20 percent (weight) of nanometer antibacterial active components (optimum selection of 3-15 percent) which firmly absorb inner cavity of the shell powder with grain diameter of 1-100 nanometer. The invention is characterized by small grain diameter, sound compatibility with materials, safety, innocuity, extensive antimicrobial spectrum, high antibacterial efficiency, sound stability and no color fade, which can be used in fields of plastics, rubber, fiber, coating, home appliance, ceramic ware, water treatment and medical products. In the respects of material source and production process, the invention overcomes defections of generally high prices of mass antibacterial products, which not only lowers production costs of antibacterial agents, but also is beneficial for governing increasingly serious environment pollutions and has great significance of the environmental protection.

Description

Technical field: [0001] The invention relates to a nano antibacterial powder and a preparation method thereof, in particular to a nano antibacterial powder with shell powder as a carrier and a preparation method thereof, belonging to the technical field of nano materials. Background technique: [0002] In 1996, the 0-157 infection incident in Japan once caused panic all over the world. In the world, the death of human beings caused by bacterial infection, including cholera, pneumonia, malaria, tuberculosis and hepatitis, has been frequently reported, which is shocking. For this reason, controlling and eliminating the growth and reproduction of harmful microorganisms is one of the most important research topics in today's high-tech. Among them, adding antibacterial agents to materials to prepare antibacterial functional materials is an effective method. [0003] The antibacterial agents used in antibacterial products are divided into three series: natural, organic and inorg...

Claims

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Application Information

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IPC IPC(8): A01N25/08A01N59/00
Inventor 李泳宋文东张兆霞林宏图郭先霞
Owner GUANGDONG OCEAN UNIVERSITY
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