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A kind of preparation method of cellulose-based composite antibacterial material

A composite antibacterial and cellulose-based technology, applied in the fields of botanical equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of low natural antibacterial agents, limited research and application, and difficulty. , to achieve the effect of excellent antibacterial properties

Active Publication Date: 2020-10-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural organic antibacterial agents include chitosan and its derivatives, sorbic acid, hinoki alcohol, peppermint extract, etc. Due to their low toxicity and good biocompatibility, they are widely used in cosmetics, medicine, and food processing industries. The application prospect is broad, but there are few natural antibacterial agents, and the preparation cost is high and difficult, so its research and application are greatly restricted

Method used

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  • A kind of preparation method of cellulose-based composite antibacterial material
  • A kind of preparation method of cellulose-based composite antibacterial material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The fiber in this experiment was softwood wood pulp.

[0028] A preparation method of cellulose-based composite antibacterial material, comprising the following steps:

[0029] Step 1, slurry preparation: first soak the coniferous wood pulp board in water for 24 hours, use a deflagging machine to decompose for 3 minutes, filter and squeeze, and balance the water for later use;

[0030] Step 2, preparation of DAC (dialaldehyde cellulose): then weigh 10g of softwood pulp with well-balanced moisture, add 100ml of 0.2mol / L NaIO 4 React at 50°C for 3 hours to prepare DAC;

[0031] Step 3, Schiff base (Schiff base) reaction: Next, weigh 2 g of DAC, dry it, add 2 ml of ethanolamine, and react at 50 ° C for 3 hours to prepare the cellulose-based Schiff base ligand;

[0032] Step 4, coordination reaction: finally weigh 0.5g of the ligand prepared above, dry it, add 0.01mol / L AgNO 3 2ml, reacted at 90°C for 30min, washed, filtered, and dried to obtain the cellulose-based Schif...

Embodiment 2

[0036] The fiber in this experiment was softwood wood pulp.

[0037] A preparation method of cellulose-based composite antibacterial material, comprising the following steps:

[0038] Step 1, slurry preparation: first soak the coniferous wood pulp board in water for 18 hours, use a decomposer to decompose for 5 minutes, filter and squeeze, and balance the water for later use;

[0039] Step 2, the preparation of DAC: then weigh 10g softwood pulp with balanced moisture, add 100ml 0.2mol / L NaIO 4 React at 60°C for 2 hours to prepare DAC;

[0040] Step 3, Schiff base reaction: Next, weigh 2 g of DAC, dry it, add 3 ml of ethanolamine, and react at 60°C for 2 hours to prepare the cellulose-based Schiff base ligand;

[0041] Step 4, coordination reaction: finally weigh 0.5g of the ligand prepared above, dry it, add 0.01mol / L AgNO 3 3ml, reacted at 70°C for 1h, washed, filtered, and dried to obtain the cellulose-based Schiff base metal complex.

[0042] Finally, the antibacterial ...

Embodiment 3

[0045] The fiber in this experiment was softwood wood pulp.

[0046] A preparation method of cellulose-based composite antibacterial material, comprising the following steps:

[0047] Step 1, slurry preparation: first soak the coniferous wood pulp board in water for 24 hours, use a deflagging machine to decompose for 3 minutes, filter and squeeze, and balance the water for later use;

[0048]Step 2, the preparation of DAC: then weigh 20g softwood pulp with balanced moisture, add 200ml 0.2mol / L NaIO 4 React at 70°C for 1 hour to prepare DAC;

[0049] Step 3, Schiff base reaction: Next, weigh 3 g of DAC, dry it, add 4 ml of ethanolamine, and react at 70°C for 1 hour to prepare the cellulose-based Schiff base ligand;

[0050] Step 4, coordination reaction: finally weigh 1g of the ligand prepared above, dry it, add 0.01mol / L AgNO 3 4ml, reacted at 80°C for 45min, washed, filtered, and dried to obtain the cellulose-based Schiff base metal complex.

[0051] Finally, the antibact...

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Abstract

A preparation method of a cellulose-based composite antibacterial material comprises the following steps: 1) preparing sizing, namely, soaking a softwood pulp board into water for several hours; defibering through a defibering machine; filtering and extruding; balancing water content for later use; 2) preparing DAC, namely, processing the sizing prepared in step 1) with sodium periodate which is used as an oxidizing agent to obtain the DAC; 3) adding cholamine and Schiff base to the DAC prepared in step 2) to obtain a metal ligand which can form a complex with most of metal ions; 4) adding a silver nitrate solution to the ligand prepared in step 3); heating through water bath; washing and filtering and drying after reaction to obtain the cellulose-based Schiff base-Ag complex. The cellulose-based Schiff base-Ag complex is high in antibacterial performance; the staphylococcus aureus and escherichia coli resisting rate is up to 99% or higher. The method is widely applied to the fields ofmedical apparatus, medical dressings, product packing and textile.

Description

technical field [0001] The invention belongs to the technical field of preparation of antibacterial materials, and in particular relates to a preparation method of cellulose-based composite antibacterial materials. Background technique [0002] There are various microorganisms such as bacteria and molds in various forms in nature, and people inevitably come into contact with these microorganisms in life and production, among which harmful microorganisms will cause harm to people's health. According to statistics, about 17 million people die from bacterial infections every year in the world. With the improvement of living standards, people pay more and more attention to their own living environment, so the attention to antibacterial materials is also increasing. [0003] Antibacterial materials can be made by adding a small amount of antibacterial agent to other common materials, or a material that does not have antibacterial properties can be further modified to have antiba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/02C08B15/06A01N55/02A01P1/00
CPCA01N55/02C08B15/02C08B15/06
Inventor 徐永建雷凤蒙景茹李莎莎段叶荣
Owner SHAANXI UNIV OF SCI & TECH