Preparation method of cellulose high efficient antibacterial material

An antibacterial material and cellulose technology, applied in the field of preparation of cellulose efficient antibacterial materials, can solve the problems of light sensitivity and fading of silver-containing materials, and achieve the effects of promoting cellulose degradation, good biocompatibility, and efficient recovery

Inactive Publication Date: 2017-01-11
QINGDAO LANNONGGU AGRI PROD RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with silver-containing materials is that they are often light-sensitive, which can lead to uncontrollable fading of silver-containing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of cellulose efficient antibacterial material is characterized in that, specifically comprises the following steps:

[0018] (1) Preparation of modified cellulase: at 30°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH=7.0, after it is completely dissolved, slowly add natural cellulase, etc. Quality polyethylene glycol maleimide, constant temperature mixing reaction for 3 hours;

[0019] (2) Preparation of cellulose powder: mix the mixture obtained by mixing polyacrylate, polyurethane and collagen at a weight ratio of 5:2:2 and rice straw fiber at a weight ratio of 1:20, stir at a speed of 200rpm for 130min, and then Use a vacuum pump to filter, control the vacuum degree to 0.2MPa in a vacuum oven, dry at a temperature of 70°C, and dry for 8 hours;

[0020] (3) Cellulose production: mix 6 wt % NaOH / 10 wt % urea aqueous solution, then add the cellulose powder prepared in step (2) to obtain a h...

Embodiment 2

[0025] A kind of preparation method of cellulose efficient antibacterial material is characterized in that, specifically comprises the following steps:

[0026] (1) Preparation of modified cellulase: at 33°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH=7.0, after it is completely dissolved, slowly add natural cellulase, etc. Quality polyethylene glycol maleimide, constant temperature mixing reaction for 3 hours;

[0027] (2) Preparation of cellulose powder: mix the mixture obtained by mixing polyacrylate, polyurethane and collagen at a weight ratio of 5:2:2 and rice straw fiber at a weight ratio of 1:20, stir at a speed of 200rpm for 130min, and then Use a vacuum pump to filter, control the vacuum degree to 0.2MPa in a vacuum oven, dry at a temperature of 70°C, and dry for 9 hours;

[0028] (3) Cellulose production: mix 6 wt % NaOH / 10 wt % urea aqueous solution, then add the cellulose powder prepared in step (2) to obtain a h...

Embodiment 3

[0033] A kind of preparation method of cellulose efficient antibacterial material is characterized in that, specifically comprises the following steps:

[0034] (1) Preparation of modified cellulase: at 35°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH=7.0, after it is completely dissolved, slowly add natural cellulase, etc. Quality polyethylene glycol maleimide, constant temperature mixing reaction for 3 hours;

[0035] (2) Preparation of cellulose powder: mix the mixture obtained by mixing polyacrylate, polyurethane and collagen at a weight ratio of 5:2:2 and rice straw fiber at a weight ratio of 1:20, stir at a speed of 200rpm for 130min, and then Use a vacuum pump to filter, control the vacuum degree to 0.2MPa in a vacuum oven, dry at a temperature of 70°C, and dry for 10 hours;

[0036] (3) Cellulose production: mix 6 wt % NaOH / 10 wt % urea aqueous solution, then add the cellulose powder prepared in step (2) to obtain a ho...

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PUM

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Abstract

The invention discloses a preparation method of a cellulose high efficient antibacterial material. The preparation method is characterized by comprising the following steps: (1) preparing modified cellulase; (2) preparing cellulose powder; (3) preparing cellulose; and (4) preparing the antibacterial material. The modified cellulase can maintain a high catalytic activity during the reaction process; the used cellulose has the advantages of renewable property and good biocompatibility; the polymer can provide an effective and nontoxic antibacterial activity in a water-expandable material; a silver nitrate water solution and cellulose are mixed, then the mixture is allowed to stand still for a while and processed by microwaves in the absence of light, the obtained material has an antibacterial activity, at the same time, due to the added silver ions, the material cannot be degraded by light easily and becomes non-photosensitive; and a nano silver antibacterial material loaded on the obtained cellulose can be widely in following fields: nano enhanced materials, antibacterial surgical gowns, wound dressing, controlled release of drugs, textile coating, and the like.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, and in particular relates to a preparation method of cellulose high-efficiency antibacterial materials. Background technique [0002] There are many substances in nature that have a good function of sterilizing or inhibiting microorganisms, such as some organic compounds with specific groups, some inorganic metal materials and their compounds, some minerals and natural substances. But at present, more antibacterial materials refer to a new class of functional materials that can inhibit or kill surface bacteria by adding certain antibacterial substances (called antibacterial agents), such as antibacterial plastics, antibacterial fibers and fabrics, antibacterial metal materials etc. Cellulose is the most renewable biomass resource in the world, with an annual biosynthesis capacity of more than 50 billion tons. The key to the high-value utilization of cellulose is how to efficient...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L33/04C08L75/04C08L89/00C08K3/24C12N9/96C12N9/42C12P19/14A01N25/10A01N59/16A01P1/00
Inventor 李红伟
Owner QINGDAO LANNONGGU AGRI PROD RES & DEV
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