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Nano-cellulose/glass fiber/immobilized nano-silver lasting antibacterial filter material, preparation method and application thereof

A technology of nano-cellulose and glass fiber, which is applied in the field of filtration, can solve the problems of weak binding force between nano-silver and the filter material substrate, excessive release, and easy leakage, etc., which is conducive to large-scale industrial production, meets demand, and has low cost Effect

Active Publication Date: 2021-09-10
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the binding force between nano-silver and the filter substrate is weak, and it is easy to leak or release too much when directly added

Method used

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  • Nano-cellulose/glass fiber/immobilized nano-silver lasting antibacterial filter material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation of nano-cellulose glass fiber durable antibacterial filter material, concrete steps are as follows:

[0038] (1) configuration concentration is the hectorite (diameter 25nm) solution of 0.1g / L, under stirring, add the silver ammonia solution that 5mL concentration is 0.001mol / L in 40mL hectorite solution, mix well, obtain hectorite- silver ammonia mixed solution;

[0039](2) in the hectorite-silver ammonia mixed solution that step (1) obtains, add the alkali lignin solution that concentration is 1g / L, obtain reaction solution, the volume of described alkali lignin solution is 10% of reaction solution volume %, carry out reduction reaction, reaction temperature is 50 ℃, reacts for 30 minutes, obtains hectorite immobilized nano-silver composite antibacterial agent, for subsequent use;

[0040] (3) glass fiber (fiber diameter 0.5 μm), nanocellulose (fiber average diameter 0.5 μm) and oxidized nanocellulose (fiber average diameter 100nm, oxidation deg...

Embodiment 2

[0044] A kind of preparation of nano-cellulose glass fiber durable antibacterial filter material, concrete steps are as follows:

[0045] (1) configuration concentration is 1g / L laponite (diameter 25nm) solution, under stirring, add 5mL concentration to be the silver ammonia solution of 0.1mol / L in 40mL laponite solution, mix well, obtain laponite-silver Ammonia mixed solution;

[0046] (2) in the hectorite-silver ammonia mixed solution that step (1) obtains, add the alkali lignin solution that concentration is 2g / L, obtain reaction solution, the volume of described alkali lignin solution is 10% of reaction solution volume %, carry out reduction reaction, reaction temperature is 60 ℃, reacts for 60 minutes, obtains hectorite immobilized nano-silver composite antibacterial agent, for subsequent use;

[0047] (3) glass fibers (fiber diameter 1 μm), nanocellulose (fiber average diameter 0.8 μm) and oxidized nanocellulose (fiber average diameter 500nm, degree of oxidation are 0.8...

Embodiment 3

[0051] A kind of preparation of nano-cellulose glass fiber durable antibacterial filter material, concrete steps are as follows:

[0052] (1) Configure a hectorite (25nm in diameter) solution with a concentration of 6g / L, add 5mL of silver ammonia solution with a concentration of 1mol / L to 40mL of hectorite solution under stirring, and mix well to obtain hectorite-silver ammonia mixture;

[0053] (2) in the hectorite-silver ammonia mixed solution that step (1) obtains, add the alkali lignin solution that concentration is 5g / L, obtain reaction solution, the volume of described alkali lignin solution is 10% of reaction solution volume %, carry out reduction reaction, reaction temperature is 80 ℃, reacts 90 minutes, obtains hectorite immobilized nano-silver composite antibacterial agent, for subsequent use;

[0054] (3) glass fiber (fiber diameter 5 μm), nanocellulose (fiber average diameter 1.5 μm) and oxidized nanocellulose (fiber average diameter 800nm, oxidation degree is 0....

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Abstract

The invention discloses a nano-cellulose / glass fiber / immobilized nano-silver lasting antibacterial filtering material, a preparation method and application thereof. The method comprises the following steps: preparing an immobilized nano-silver composite antibacterial agent by taking lignin as a reducing agent and hectorite as an immobilized template; and by using glass fibers are used as a filter material substrate, nano-crystalline cellulose and oxidized nano-crystalline cellulose as a flexible and aperture regulator and a dispersing agent, ,mixing the glass fibers, the nano-crystalline cellulose, the oxidized nano-crystalline cellulose and the immobilized nano-silver antibacterial agent, and carrying out suction filtration and freeze-dried to obtain the filter material. The method is simple in process and easy to industrialize, and the obtained filtering material has pore channel distribution with hierarchical structure difference, relatively high porosity and relatively compact fiber stacking density. In the filtering material, the 30-day release proportion of the immobilized nano-silver serving as the antibacterial agent is lower than 15 wt%, and the antibacterial agent is slowly released to ensure the antibacterial durability. When the material is applied to a filtering system, the constructed hierarchical pore channel structure has a graded filtering effect, and the filtering efficiency of pollutants can be improved.

Description

technical field [0001] The invention belongs to the field of filtration, and in particular relates to a nano-cellulose / glass fiber / immobilized nano-silver durable antibacterial filter material and a preparation method and application thereof. Background technique [0002] In recent years, a large amount of exhaust gas produced by industrial production, automobile exhaust, and daily combustion has caused serious air pollution problems, especially fine particles (PM2. serious threat to health. Although the traditional glass fiber filter material can effectively filter the polluted particles, the pore structure formed by the filter material is homogeneous, and the pressure resistance is relatively large when finer particles are trapped; and the mechanical properties of the glass fiber itself are poor, brittle, resistant Poor abrasiveness is not conducive to processing (Building and Environment, 2020, 183, 107182-107193). [0003] Nanocellulose is a negatively charged flexible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/02B01D46/30
CPCB01D39/02B01D46/30B01D46/0028B01D2239/0442B01D2239/10Y02A50/2351
Inventor 罗继文吴正国覃筱葴韦岚升周禧刘叶
Owner SOUTH CHINA NORMAL UNIVERSITY
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