In-situ synthesis method for regulating and controlling surface and interface pores and properties of carbon membrane

An in-situ synthesis, surface interface technology, applied in membrane technology, separation methods, semi-permeable membrane separation, etc., can solve the problems of poor pore structure and surface properties of carbon membranes, poor separation performance of carbon membranes for oily wastewater purification and treatment, etc. Achieve the effect of improving surface hydrophilicity, easy to enlarge and popularize application, and concentrated pore size distribution

Pending Publication Date: 2022-08-02
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to provide an in-situ synthesis method for regulating the pores and properties of the surface of the carbon membrane, which can solve the pro

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  • In-situ synthesis method for regulating and controlling surface and interface pores and properties of carbon membrane
  • In-situ synthesis method for regulating and controlling surface and interface pores and properties of carbon membrane
  • In-situ synthesis method for regulating and controlling surface and interface pores and properties of carbon membrane

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Effect test

Embodiment 1

[0038] In the present invention, the carbon membrane with an average pore diameter of 2 μm, a porosity of 70% and a surface water contact angle of 60° is placed in an oven at 100° C. for 10 hours to reach a constant weight; then, degassing is continued in a vacuum oven at 100° C. for 2 hours. . Add hydrochloric acid dropwise to the prepared tromethamine solution with a concentration of 1.2 g / L, and adjust the pH to 8.56. Dopamine is then added to prepare a pre-formulation with a concentration of 3-10 mg / L. Wherein, hydrochloric acid: tromethamine: dopamine=0.217: 1.21: 0.003-0.01 (mass ratio). The carbon film is dipped into the preformulation solution, and the reaction temperature is 25-50° C. for 1-72 hours. After repeating the introduction reaction, the carbon membrane was taken out, washed once with distilled water, and then air-dried at room temperature for 30 minutes in a natural environment. The osmosis method was used to determine the separation effect of the carbon ...

Embodiment 2

[0042] First, the carbon membrane with an average pore size of 0.1 μm, a porosity of 20%, and a surface water contact angle of 150° was dried in an oven at 100°C for 10 hours to reach a constant weight; then, degassed in a vacuum oven at 100°C. 6h. A glutaraldehyde-hydrochloric acid mixed solution is prepared, and then polyvinyl alcohol is added to obtain a preformulation solution. Wherein, glutaraldehyde: hydrochloric acid: polyvinyl alcohol=3-13:2.5-10:5-20 (mass ratio). The carbon film is dipped into the preformulation solution, and the reaction temperature is 40-60° C. for 0.1-4 hours. After repeating the introduction reaction, the carbon membrane was taken out, washed 5 times with low-concentration sodium hydroxide lye with pH 9-12 and distilled water to neutrality, and then dried in argon flow at room temperature under natural environment for 300 minutes. The osmosis method was used to determine the separation effect of carbon membranes on oily wastewater. The specific...

Embodiment 3

[0046] First, the carbon membrane with an average pore size of 0.6 μm, a porosity of 50%, and a surface water contact angle of 110° was dried in an oven at 100°C for 10 hours to reach a constant weight; then, degassed in a vacuum oven at 100°C. 4h. Prepare ferric chloride and sodium hydroxide solution, mix the two solutions evenly to prepare a pre-formulation solution. Wherein, ferric chloride: sodium hydroxide=1:1 (mass ratio). The carbon film is immersed in the preformulation solution, and the reaction temperature is 40-60° C. for 0.1-10 hours. After repeating the introduction reaction, the carbon membrane was taken out, washed 20 times with low-concentration dilute hydrochloric acid and distilled water with a pH value of 1-3 until neutral, and then dried in hot air at 60°C for 180 minutes in a natural environment. The osmosis method was used to determine the separation effect of the carbon membrane on the oily wastewater. The specific data are shown in Table 3.

[0047] ...

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Abstract

The invention provides an in-situ synthesis method for regulating and controlling surface and interface pores and properties of a carbon membrane, which comprises four steps of carbon membrane pretreatment, introduction of a pre-preparation, in-situ synthesis and post-treatment: carbon membrane pretreatment: drying the carbon membrane to constant weight at a constant temperature, and then degassing the carbon membrane to obtain a carbon membrane suspension; preparing a pre-preparation: selecting one or more of dopamine, polyvinyl alcohol, ferric trichloride, tannic acid, hydrochloric acid, water, tromethamine, glutaraldehyde, sodium hydroxide and ferric chloride hexahydrate as the pre-preparation, preparing the pre-preparation into a solution, and performing one of a complete impregnation method, a surface impregnation method and a vacuum-assisted impregnation method to prepare the pre-preparation; the pre-preparation is introduced into the surface or pores of the pre-treated carbon membrane, so that the problems of poor pore structure and surface properties of the carbon membrane and poor separation performance of the carbon membrane on oily wastewater purification treatment when the existing carbon membrane is used for separating an oil-water mixture can be solved.

Description

technical field [0001] The invention belongs to the technical field of reaction and separation in the discipline of chemical engineering and technology, and particularly relates to an in-situ synthesis method for regulating the pores and properties of carbon membrane surfaces and interfaces. Background technique [0002] With the rapid increase of industrial activities, the continuous expansion of the population, and the rapid development of the global economy, human beings are increasingly dependent on and demand for fossil energy and raw materials. What followed was the rapid development and expansion of industries that accelerated fossil energy (such as oil extraction and processing industry, food processing industry, iron and steel production industry, etc.). As a result, the increasingly serious generation and discharge of large amounts of wastewater is inevitably caused (P. Kajitvichyanukul, et al, Handbook of Environmental Engineering, 2011, 13: 639-642). Due to the ...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D65/02B01D65/06C02F1/44C02F1/40
CPCB01D67/0081B01D67/0093B01D65/02B01D65/06B01D67/0095C02F1/44C02F1/40B01D2323/28B01D2325/30B01D2323/46C02F2209/44C02F2209/02Y02W10/37
Inventor 张兵李洪超庄殿铮吴永红赵金玉赵海超关晓彤黎彦泰梁海涛
Owner SHENYANG POLYTECHNIC UNIV
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