Preparation method of alveolate multilayer pore structure activated carbon film

A multi-layered, honeycomb-like technology, applied in the field of porous materials, to achieve the effects of strong adsorption, easy recycling and reuse, and high porosity

Active Publication Date: 2012-12-19
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials for preparing activated carbon are generally wood chips, charcoal, coal, pulp waste liquid and many carbon-containing industrial waste products. Activated carbon has rarely been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Under magnetic stirring conditions, dissolve 0.5 g of cellulose acetate in 25 g of dichloromethane solvent to prepare a 2 wt% cellulose acetate casting solution.

[0026] 2. Use a micro-syringe to extract 100 μL of the solution, inject the casting solution onto the glass substrate at an ambient humidity of 56% R.H. and a temperature of 25°C, and vacuum-dry the prepared film at 50°C for 1.5 hours to remove residual solvent to obtain a honeycomb multilayer cellulose acetate membrane with a pore diameter of 1.5 μm.

[0027] 3. Then, the above-mentioned membrane was hydrolyzed with 0.1 mol / L NaOH / ethanol solution for 10 hours, and the cellulose acetate was converted into cellulose to obtain a honeycomb multi-layer porous structure cellulose membrane.

[0028] 4. Soak the cellulose membrane with honeycomb multi-layer porous structure in a zinc chloride solution with a mass concentration of 1%, place it in a water bath shaker at 50°C for 5h, then take it out and dry it in ...

Embodiment 2

[0032] 1. Under the condition of magnetic stirring, dissolve 0.75 g of cellulose acetate in 25 g of dichloroethane solvent to prepare a cellulose acetate solution with a mass fraction of 3 wt%.

[0033] 2. Use a micro-syringe to extract 100 μL of the casting solution, and inject the casting solution onto the glass substrate under the condition of an ambient humidity of 75% R.H. oC Vacuum-dried for 1.5 h to remove the residual solvent to obtain a cellulose acetate membrane with a honeycomb multilayer porous structure with a pore diameter of 2.1 μm.

[0034] 3. Then, the above-mentioned membrane was hydrolyzed by 0.1 mol / L NaOH / ethanol solution for 16 hours, and the cellulose acetate was converted into cellulose to obtain a honeycomb multi-layer porous structure cellulose membrane.

[0035] 4. Soak the cellulose membrane with honeycomb multi-layer porous structure in the aluminum chloride solution with a mass concentration of 2%, place it in a water bath shaker at 60°C for 6 ho...

Embodiment 3

[0039] 1. Under the condition of magnetic stirring, dissolve 1 gram of cellulose acetate in 25 grams of carbon tetrachloride solvent to prepare a cellulose acetate solution with a mass fraction of 4 wt%.

[0040] 2. Use a micro-syringe to extract 100 μL of the casting solution, and inject the solution onto the glass substrate at an ambient humidity of 83% R.H. and a temperature of 30°C, and vacuum-dry the prepared film at 50°C for 1.5 hours to remove residual solvent to obtain a honeycomb multilayer cellulose acetate membrane with a pore diameter of 2.5 μm.

[0041] 3. Then, the above membrane was hydrolyzed with 0.1 mol / L NaOH / ethanol solution for 20 hours to convert cellulose acetate into cellulose to obtain a honeycomb multi-layer porous structure cellulose membrane.

[0042] 4. Soak the cellulose membrane with a honeycomb multi-layer porous structure in a 4% ammonium chloride solution, place it in a water bath shaker at 80°C for 6 hours, then take it out and dry it in vacu...

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Abstract

The invention relates to a preparation method of an alveolate multilayer pore structure activated carbon film. The technical scheme comprises the following steps of: taking cellulose acetate as film material, and taking low-boiling point organic solvent as solvent, so that film casting liquid can be prepared; preparing an alveolate multilayer pore structure cellulose acetate film by a water vapor assisting method, hydrolyzing in 0.1mol/L NaOH/ethanol solution for 10-24 hours, soaking in 1-5% of inorganic salt solution to be activated, stabilizing, carbonizing, washing, and drying, so that the alveolate multilayer pore structure activated carbon film can be prepared. The preparation method combines the water vapor assisting method with the carbonization, and is simple in technology, and suitable for the large-scale industrial preparation. The prepared alveolate multilayer pore structure activated carbon film has the characteristics of being multilayer in alveolate pore structure, large in specific surface area, and high in porosity. The prepared alveolate multilayer pore structure activated carbon film has a very high absorption function to organic dyestuff, and is easy to recycle.

Description

technical field [0001] The invention relates to the field of porous materials, in particular to a preparation method of a honeycomb multi-layer porous structure activated carbon membrane. Background technique [0002] Activated carbon is a kind of porous material with very large specific surface area and pore capacity, and strong surface reactivity. Because the adsorbate is easily diffused into the pores and the active surface, activated carbon has a wide range of adsorption properties and high adsorption capacity. It is widely used in electronics, water treatment, solvent recovery, air purification, deozone, dehumidification and other environmental and resource recovery fields. The commonly used dye wastewater treatment methods in industry include flocculation precipitation method, electrochemical method, adsorption method, electrolysis, chemical oxidation, biological treatment method and combination of various methods, etc. The adsorption method is effective in treating i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20B01J20/28
Inventor 刘海清刘瑞来
Owner FUJIAN NORMAL UNIV
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