Bacterial cellulose membrane/porous carbon adsorbent and preparation thereof

A technology of bacterial cellulose membrane and adsorbent is applied in the field of bacterial cellulose membrane/porous carbon adsorbent and its preparation, which can solve the problems such as the inability to strictly control air PM2.5, and achieve the effect of cheap raw materials

Inactive Publication Date: 2015-06-24
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the above method still cannot strictly control the amount of PM2.5 in the air

Method used

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  • Bacterial cellulose membrane/porous carbon adsorbent and preparation thereof
  • Bacterial cellulose membrane/porous carbon adsorbent and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Step 1: Acetobacter xylinum was used for seed amplification, cultured on a shaking table, the culture temperature was 30°C, the speed of the shaker was 160 rpm, and the culture time was 36 h;

[0036] Step 2: Add 10 g / L sodium carboxymethyl cellulose when preparing the fermentation broth; after the sodium carboxymethyl cellulose is completely dissolved, add 1 g / L calcium carbonate, sonicate for 60 minutes, and sterilize at 121°C for 20 minutes , cooled to room temperature;

[0037] Step 3: Acetobacter xylinum is inoculated with an inoculum of 8%, cultured after inoculation, and cultivated for 5 days;

[0038] Step 4: After the fermentation is over, use NaOH with a mass fraction of 3 g / L and H at 3 g / L 2 o 2 Water bath at 80°C for 3.0 hours to remove residual cells and fermentation broth;

[0039] Step 5: Soak the BC membrane with 20 g / L acetic acid for 24 h to remove the calcium carbonate embedded in the cellulose network;

[0040] Step 6: Rinse the BC membrane with...

Embodiment 2

[0042] The first step: Acetobacter xylinum was used for seed amplification, cultured on a shaking table, the culture temperature was 29°C, the speed of the shaker was 160 rpm, and the culture time was 36 h;

[0043] Step 2: Add 10 g / L sodium carboxymethyl cellulose when preparing the fermentation broth; after the sodium carboxymethyl cellulose is completely dissolved, add 3 g / L calcium carbonate, sonicate for 20 minutes, and sterilize at 115°C for 25 minutes , cooled to room temperature;

[0044] Step 3: Acetobacter xylinum is inoculated with an inoculum of 8%, cultured after inoculation, and cultivated for 5 days;

[0045] Step 4: After the fermentation is over, use 4 g / L of NaOH and 4 g / L of H 2 o 2 Water bath at 85°C for 2.0 hours to remove residual cells and fermentation broth;

[0046] Step 5: Soak the BC membrane with 30 g / L acetic acid for 24 h to remove the calcium carbonate embedded in the cellulose network;

[0047] Step 6: Rinse the BC membrane with deionized wa...

Embodiment 3

[0049] The first step: Acetobacter xylinum was used for seed amplification, and the culture was shaken on a shaking table, the culture temperature was 31°C, the speed of the shaker was 160 rpm, and the culture time was 42 h;

[0050] Step 2: Add 15 g / L sodium carboxymethyl cellulose when preparing the fermentation broth; after the sodium carboxymethyl cellulose is completely dissolved, add 4 g / L calcium carbonate, sterilize at 121°C for 15 minutes, and cool to room temperature;

[0051] The third step: Acetobacter xylinum is inoculated with 10% inoculation amount, and after inoculation, it is cultured statically and cultivated for 7 days;

[0052] Step 4: After the fermentation is over, use a NaOH solution with a mass fraction of 5 g / L and 5 g / L of H 2 o 2 Water bath at 75°C for 3.0 hours to remove residual cells and fermentation broth;

[0053] Step 5: Soak the BC membrane with 40 g / L acetic acid for 36 h to remove the calcium carbonate embedded in the cellulose network; ...

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Abstract

The invention discloses a bacterial cellulose membrane/porous carbon adsorbent and preparation thereof. The bacterial cellulose membrane/porous carbon adsorbent is prepared by taking a bacterial cellulose membrane as a matrix, taking different saccharides as carbon sources and using a hydrothermal carbonization method; due to the anchoring function of a large number of hydroxyls on the surface of the bacterial cellulose, the porous carbon can be preferably dispersed in the bacterial cellulose membrane and different nano pore diameters can be obtained by adjusting the growth process of the bacterial cellulose membrane. The adsorbent combines the filtration of the nano pore diameters of the membrane and the adsorption of the porous carbon, is used for adsorbing and dispelling PM2.5 smoke and poisonous gas and has the advantages f being environmentally friendly and high in efficiency.

Description

technical field [0001] The invention relates to an adsorbent for removing PM2.5 smoke dust and toxic gas, in particular to a bacterial cellulose membrane / porous carbon adsorbent and a preparation method thereof. Background technique [0002] In recent years, my country's air pollution has become more and more serious, especially the smog phenomenon has become a major killer that threatens people's normal life. Studies have found that the main cause of the smog phenomenon is the existence of a large number of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, also known as particulate matter that can enter the lungs. It mainly comes from the residues discharged from combustion in the process of daily power generation, industrial production, and automobile exhaust emissions. Due to the small particle size, large specific surface area and strong activity, the particles are easy to be accompanied by toxic and harmful ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24B01D53/02B01D46/00
Inventor 杨加志李兵兵魏静蒋国民鲁啸宇代北北夏庆成毛霏韩静
Owner NANJING UNIV OF SCI & TECH
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