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Preparation method of high-performance mesoporous silica-chitosan composite antibacterial filter

A technology of mesoporous silica and chitosan, which is applied in chemical instruments and methods, filtration and separation, membrane filters, etc., can solve the problems of low ability to prevent solid particles and cumbersome preparation, and achieve good results and simple reaction system , The effect of mild reaction and easy control

Active Publication Date: 2020-12-01
SHANDONG LINK SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of the above-mentioned process is cumbersome, and the ability to prevent solid particles is low

Method used

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  • Preparation method of high-performance mesoporous silica-chitosan composite antibacterial filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 150mg of the template agent cetyltrimethylammonium bromide (abbreviation: CTAB) in 15ml of ultrapure water, stir and mix in the reaction kettle, and at the same time, control the temperature at 40°C to dissolve it, and dissolve 5mL of NaOH Add 4.0mL of the template additive ethyl acetate (abbreviation: EtOAC) dropwise into the CTAB solution, and after stirring at a constant speed for 5min, add 1.0mL of the silicon oxide precursor orthosilicate (abbreviation: TEOS) to the mixed solution. During the stirring process, the mixed solution changed from colorless and transparent to a milky white solution. After continuous stirring for 24 hours, the solution was transferred to a centrifuge for centrifugation at a speed of 6000r / min. After centrifugation for 10 minutes, the supernatant suspension was removed to obtain a solid white precipitate.

[0038] Add 50ml of absolute ethanol to the obtained solid white precipitate and sonicate for 8 minutes, centrifuge at a speed...

Embodiment 2

[0041] Dissolve 100mg of template agent CTAB in 15ml of ultrapure water, stir and mix in the reaction kettle, and at the same time, control the temperature at 45°C to dissolve it, add 2mL of ammonia water and 3.0mL of template aid EtOAC to the CTAB solution dropwise , after stirring at a constant speed for 5 minutes, add 0.5 mL of silicon oxide precursor TEOS to the mixed solution. During the stirring process, the mixed solution turns from colorless and transparent to a milky white solution. After continuous stirring for 24 hours, the solution is transferred to a centrifuge for further Centrifuge at a speed of 6000r / min. After centrifuging for 10 minutes, remove the supernatant suspension to obtain a solid white precipitate.

[0042] Add 50ml of absolute ethanol to the obtained solid white precipitate and sonicate for 5 minutes, centrifuge at a speed of 4000r / min for 3 minutes, dry the white precipitate obtained by centrifugation at 75-85°C to obtain mesoporous silica powder. ...

Embodiment 3

[0045] Firstly, mix 2% glacial acetic acid aqueous solution with chitosan to prepare chitosan-acetic acid solution with 0.5% mass fraction. Get 50ml of chitosan-acetic acid solution and 2ml of 3-glycidyl ether trimethoxysilane and mix, after stirring overnight, get the white powdery mesoporous silica powder prepared in Example 1 and add in the overnight liquid, stir and centrifuge, Then use ultrapure water to wash, and finally obtain the chitosan-mesoporous silica composite material. Wherein, the mass ratio of chitosan to mesoporous silica is 5:0.08.

[0046] Cut the non-woven fabric into a size of 40cm×30cm, prepare the prepared chitosan-mesoporous silica composite solution with a concentration of 100g / L, impregnate the chitosan-mesoporous silica composite solution and the non-woven fabric Composite, pre-bake the composite sample at 50°C for 3 minutes, bake at 120°C for 3 minutes, put the sample under a 3kw ultraviolet high-pressure mercury lamp for 20s, and cure the sample ...

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Abstract

The invention provides a preparation method of a high-performance mesoporous silica-chitosan composite antibacterial filter. The preparation method comprises the following steps: (1) firstly, uniformly mixing a glacial acetic acid aqueous solution with chitosan to prepare a chitosan-acetic acid solution, then mixing and stirring the chitosan-acetic acid solution with 3-glycidyl ether trimethoxysilane overnight, adding mesoporous silica powder into the overnight solution, stirring and centrifuging, and then washing with ultrapure water to obtain a chitosan-mesoporous silica composite material;and (2) adding water into the chitosan-mesoporous silica composite material prepared in the step (1) to prepare a solution with the concentration of 100g / L, compounding the solution with a non-woven fabric, carrying out pre-drying and baking treatment on the composite sample, and carrying out ultraviolet curing to prepare the antibacterial filter. According to the prepared filter, the antibacterial rate reaches 90% or above, meanwhile, ultrafine particles in air can be effectively filtered out, and the effective haze prevention effect is achieved.

Description

technical field [0001] The invention relates to the technical field of antibacterial filtration, in particular to a high-performance mesoporous silica-chitosan composite antibacterial filter and a preparation method thereof. Background technique [0002] In recent years, with the improvement of the level of social industrialization, environmental problems have become increasingly prominent, and the term "smog" that appeared in 2013 has gained popularity. PM2.5, the main pollutant of smog, is a fine particle with a particle size less than or equal to 2.5 μm. PM2.5 can enter the alveoli and deposit through the human respiratory tract, causing damage to the human respiratory system and easily causing bronchitis, myocardial infarction and other diseases . In addition, there are various bacterial viruses in the air, such as Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, influenza virus, etc. These bacterial viruses have strong viability, are very easy to reprod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08B01D46/00B01D46/10D06M11/79D06M15/03
CPCB01D39/08B01D46/0028B01D46/10D06M15/03D06M11/79D06M16/00B01D2239/0442B01D2239/0407B01D2239/10B01D2239/065
Inventor 刘彩艳吴晓林殷鹏刚陈华祥刘红亮
Owner SHANDONG LINK SCI & TECH CO LTD
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