Nanometer silver-nanocrystalline cellulose compound, preparation method of nanometer silver-nanocrystalline cellulose compound, and application of nanometer silver-nanocrystalline cellulose compound

A nano-microcrystalline and cellulose technology, applied in the field of nano-materials, can solve the problems of large nano-silver particles, uneven dispersion, long reaction time, etc., and achieve the effect of uniform particle size, simple raw materials, and short reaction time

Inactive Publication Date: 2014-05-14
SOUTH CHINA UNIV OF TECH
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  • Claims
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Problems solved by technology

[0004] The Chinese invention patent "Preparation Method of Bacterial Cellulose-Nano-Silver Composite Material" with the application number of 201010139916.7 discloses a preparation method of bacterial cellulose-nano-silver composite material using a non-toxic reducing agent. Alcohol is used as a stabilizer, which avoids the toxicity problem caused by other reagents, but the method steps are more complicated, more reagents are introduced, and the cost is higher
The Chinese invention patent application with the application number 201310318590.8 "A Green Synthesis Method of Cellulose Nano-Silver Particles" discloses a hydrothermal reaction system that combines the hydrolysis of lignocellulose with the reduction process of nano-silver particles. The technology of preparing nano-silver particles by reducing the hydrolyzed product of glucose to prepare nano-silver particles. This preparation method does not need to introduce other che

Method used

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  • Nanometer silver-nanocrystalline cellulose compound, preparation method of nanometer silver-nanocrystalline cellulose compound, and application of nanometer silver-nanocrystalline cellulose compound
  • Nanometer silver-nanocrystalline cellulose compound, preparation method of nanometer silver-nanocrystalline cellulose compound, and application of nanometer silver-nanocrystalline cellulose compound
  • Nanometer silver-nanocrystalline cellulose compound, preparation method of nanometer silver-nanocrystalline cellulose compound, and application of nanometer silver-nanocrystalline cellulose compound

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of nanometer silver-nanometer microcrystalline cellulose compound, its preparation method comprises the following steps:

[0041] (1) Under the condition of magnetic stirring at 30 rpm, add 10 g of nanocrystalline cellulose aqueous solution with a mass fraction of 6% to 352 ml of AgNO with a concentration of 0.001 mol / L 3 solution, stirred for 0.5 hours;

[0042](2) Stir the mixed solution in step (1) in an ultrasonic container under the reaction conditions of a stirring rate of 50 rpm and a power of 100 watts for 20 minutes, and centrifuge the reaction solution at 10,000 r / min for 15 minutes after the reaction. Take the precipitate, wash it successively with absolute ethanol and distilled water, and obtain the product nano-silver-nano-microcrystalline cellulose composite.

[0043] (3) The obtained product was dried in vacuum at 60° C. for 3 h, and the dried product nanosilver-nanocrystalline cellulose composite was designated as Ag / NCC-1.

[0044] Carry out X-...

Embodiment 2

[0047] A kind of nanometer silver-nanometer microcrystalline cellulose compound, its preparation method comprises the following steps:

[0048] (1) Under the condition of magnetic stirring at 50 rpm, add 15 g of nanocrystalline cellulose aqueous solution with a mass fraction of 10% to 9 ml of Ag (CH 3 COO) 2 solution, stirred for 0.6 hours;

[0049] (2) Stir the mixed solution in step (1) in an ultrasonic container under the reaction conditions of a stirring rate of 70 rpm and a power of 600 watts for 40 minutes, and centrifuge the reaction solution at 10,000 r / min for 15 minutes after the reaction. Take the precipitate, wash it successively with absolute ethanol and distilled water, and obtain the product nano-silver-nano-microcrystalline cellulose composite.

[0050] (3) The obtained product was dried in vacuum at 60° C. for 3 h, and the dried product nanosilver-nanocrystalline cellulose composite was designated as Ag / NCC-2.

[0051] The obtained nano-silver-nano-microcry...

Embodiment 3

[0053] A kind of nanometer silver-nanometer microcrystalline cellulose compound, its preparation method comprises the following steps:

[0054] (1) Under the condition of magnetic stirring at 100 rpm, add 12 g of nanocrystalline cellulose aqueous solution with a mass fraction of 15% to 142 ml of AgF solution with a concentration of 0.01 mol / L, and stir for 0.6 hours;

[0055] (2) Stir the mixed solution in step (1) in an ultrasonic container under the reaction conditions of a stirring rate of 100 rpm and a power of 1000 watts for 60 minutes. After the reaction, centrifuge the reaction solution at 10000 r / min for 15 minutes, and take Precipitation, washing with absolute ethanol and distilled water in sequence to obtain the product nano-silver-nano-microcrystalline cellulose composite.

[0056] (3) The obtained product was dried in vacuum at 60° C. for 3 h, and the dried product nanosilver-nanocrystalline cellulose composite was designated as Ag / NCC-3.

[0057] The obtained nan...

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Abstract

The invention belongs to the technical field of nanometer materials, and discloses a preparation method of the nanometer silver-nanocrystalline cellulose compound. The preparation method includes the following steps of adding a nanometer silver-nanocrystalline cellulose aqueous solution to a silver salt aqueous solution under the stirring condition, conducting stirring to obtain mixed liquor, stirring the mixed liquor in an ultrasonic container, conducting an ultrasonic reaction, conducting centrifugal separation on the reaction liquor after the reaction is completed, and taking and washing sediments to obtain the nanometer silver-nanocrystalline cellulose compound. The nanometer silver-nanocrystalline cellulose compound obtained through the method can serve as an antibacterial material to be applied to the field of articles of daily use, the medical treatment and public health field, the building material coating field and the electronic product field. The sizes of nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound are the same. Dispersity of the nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound is good. Nanometer silver is evenly loaded on the nanometer silver-nanocrystalline cellulose and not prone to agglomeration. The nanometer silver-nanocrystalline cellulose compound has good solubility in water.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a nano silver-nano microcrystalline cellulose composite and a preparation method and application thereof. Background technique [0002] At present, antibacterial materials mainly include natural antibacterial materials and organic synthetic antibacterial materials. Generally speaking, natural antibacterial materials have the advantages of high safety, but their general lifespan is short, heat resistance is poor, and it is not easy to be reprocessed; organic synthetic antibacterial materials have the advantages of wide antibacterial range and fast sterilization speed, but their thermal stability is relatively low. Poor, easy to decompose, poor persistence, usually highly toxic, and harmful to the human body if used for a long time; in order to overcome the shortcomings of natural antibacterial materials and organic synthetic antibacterial materials, people gradua...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00A01N59/16A01N25/10A01P1/00
Inventor 张念椿丁恩勇胡建强
Owner SOUTH CHINA UNIV OF TECH
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