Preparation method of antibacterial fiber adsorption film

An adsorption film and antibacterial technology, which is applied in the field of preparation of antibacterial fiber adsorption film, can solve the problems of restricting the application of cellulose, harsh dissolution conditions, fiber film limitation, etc., and achieve remarkable antibacterial effect, stable antibacterial property and easy recycling Effect

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

At present, solvents with good solubility for cellulose have problems such as high price, harsh dissolution conditions, easy volatility, difficult recovery, and viscous solution to varying degrees, which greatly limit the application of cellulose.
[0004] During the use of materials, most materials are prone to adsorption with particles, colloidal particles or solute macromolecules in the feed liquid to cause membrane fouling. Membrane material fouling is an unavoidable problem in the process of membrane application. Fiber materials as The carrier of microorganisms, microorganisms can grow on the surface of the cellulose membrane and cause membrane fouling, which limits the application of the fiber membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of antibacterial fiber adsorption film is characterized in that, specifically comprises the following steps:

[0020] (1) Preparation of modified invertase: at 33°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH = 7.0, and after it is completely dissolved, slowly add an equal mass of polyethylene glycol with a molecular weight of 20,000 Diol maleimide, after mixing evenly, react at constant temperature for 3 hours;

[0021] (2) Cellulose pretreatment: Mix 10wt% NaOH with a concentration of 3mol / L and 15wt% urea aqueous solution, add microcrystalline cellulose with a weight ratio of 6% to the mixture, control the temperature of the reaction system at 85°C, and then Quickly add dry LiCl, and stir to dissolve for 2.5h;

[0022] (3) Prepare antibacterial liquid: mix 15wt% AgN0 with a concentration of 0.5mol / L and 12wt% ammonia with a concentration of 0.3mol / L, and react at room temperature for 45mi...

Embodiment 2

[0028] A kind of preparation method of antibacterial fiber adsorption film is characterized in that, specifically comprises the following steps:

[0029] (1) Preparation of modified invertase: at 33°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH = 7.0, and after it is completely dissolved, slowly add an equal mass of polyethylene glycol with a molecular weight of 20,000 Diol maleimide, after mixing evenly, react at constant temperature for 3 hours;

[0030] (2) Cellulose pretreatment: Mix 10wt% NaOH with a concentration of 4mol / L and 15wt% urea aqueous solution, add microcrystalline cellulose with a weight ratio of 7% to the mixture, control the temperature of the reaction system at 88°C, and then Quickly add dry LiCl, and stir to dissolve for 2.3h;

[0031] (3) Prepare antibacterial liquid: mix 15wt% AgN0 with a concentration of 0.5mol / L and 12wt% ammonia with a concentration of 0.3mol / L, and react at room temperature for 48mi...

Embodiment 3

[0037] A kind of preparation method of antibacterial fiber adsorption film is characterized in that, specifically comprises the following steps:

[0038] (1) Preparation of modified invertase: at 33°C, add natural cellulase to the citric acid-disodium hydrogen phosphate buffer solution with pH = 7.0, and after it is completely dissolved, slowly add an equal mass of polyethylene glycol with a molecular weight of 20,000 Diol maleimide, after mixing evenly, react at constant temperature for 3 hours;

[0039] (2) Cellulose pretreatment: Mix 10wt% NaOH with a concentration of 5mol / L and 15wt% urea aqueous solution, add 8% by weight microcrystalline cellulose to the mixture, control the temperature of the reaction system at 90°C, and then Quickly add dry LiCl, and stir to dissolve for 2h;

[0040] (3) Prepare antibacterial liquid: mix 15wt% AgN0 with a concentration of 0.5mol / L and 12wt% ammonia with a concentration of 0.3mol / L, and react at room temperature for 50min to obtain an ...

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Abstract

The invention discloses a preparation method of an antibacterial fiber adsorption film. The method comprises the following steps: 1) preparing modified invertase; 2) pre-treating cellulose; 3) preparing an antibacterial fluid; 4) preparing a cellulose membrane; and 5) preparing an antibacterial film. The modified invertase can promote cellulose degradation and increases the enzyme catalytic activity, a NaOH and urea aqueous solution is taken as a cellulose solvent to rapidly dissolve cellulose to a transparent solution, homogeneity and stability are good, a cellulose solution has good spinnability and film forming ability, dried LiCl is added, oxidizing discoloration is difficulty carried, antibiosis effect is obvious, hygroscopicity is good, the chemical raw materials are easily recovered and recycled, the fiber adsorption film has the advantages of comprehensive properties of excellent aging resistance and high temperature resistance through ultrasonic concussion, aqueous solution processing is processed through silver-ammonia complex ions, and the antibacterial fiber adsorption film has stable antibacterial property, and good antibiosis effect.

Description

technical field [0001] The invention belongs to the technical field of cellulose materials, and in particular relates to a preparation method of an antibacterial fiber adsorption film. Background technique [0002] Harmful bacteria cause great harm to people's health and life. In 1996, pathogenic Escherichia coli 0-157 infection in Japan caused a nationwide food poisoning incident. Therefore, countries all over the world attach great importance to the research of antibacterial materials, which are emerging international ecological environment materials closely related to human health development and environmental protection in recent years. In developed countries and regions in the world, the research and application of antibacterial materials are extremely extensive. The first research is an organic antibacterial material synthesized by organic tin, acid, phenol and other chemical substances, which are mainly used in fiber fabrics. Organic antibacterial materials have sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 李红伟
Owner QINGDAO LANNONGGU AGRI PROD RES & DEV
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