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Preparation method of a poly (furfuryl alcohol) based composite carbon membrane

A polyfurfuryl alcohol and composite carbon technology is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve the problems of complex process, high carbon membrane preparation cost, poor mechanical strength, etc., and achieves simple preparation technology and production. The effect of low cost and high mechanical strength

Inactive Publication Date: 2008-12-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a high-performance composite carbon membrane with low cost, simple production process, and easy industrialization, so as to solve the problems of high carbon membrane preparation cost, poor mechanical strength, and complicated process.

Method used

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  • Preparation method of a poly (furfuryl alcohol) based composite carbon membrane
  • Preparation method of a poly (furfuryl alcohol) based composite carbon membrane
  • Preparation method of a poly (furfuryl alcohol) based composite carbon membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Put 99.5g of furfuryl alcohol and 0.5g of oxalic acid into a three-necked flask equipped with a condenser, and start the stirrer to react in an oil bath at 70°C for 13 hours. After the reaction was complete, the product was cooled to room temperature in a test tube. A coal-based carbon tube with an average pore size of 0.3 μm was selected as the support body, and a uniform polymer film was coated on the surface of the support body by the dip coating method. Put it into a carbonization furnace, raise the temperature to 700°C at a rate of 1°C / min under the protection of argon, keep the temperature at a constant temperature for 2 hours, and naturally cool to room temperature to obtain a polyfurfuryl alcohol-based composite carbon film. The polyfurfuryl alcohol-based composite carbon membrane was used for gas separation, and the measured H 2 , CO 2 , O 2 , N 2 and CH 4 The permeation fluxes were 174.8, 17.50, 5.81, 0.57, and 0.14 Barrer, H 2 / N 2 , CO 2 / N 2 , O 2...

Embodiment 2

[0018] Put 92g of furfuryl alcohol and 8g of iodine into a three-necked flask equipped with a condenser, and start the stirrer to react in an oil bath at 25°C for 2 hours. After the reaction was complete, the product was cooled to room temperature in a test tube. A coal-based carbon tube with an average pore size of 0.3 μm was selected as the support body, and a uniform polymer film was coated on the surface of the support body by the dip coating method. Put it into a carbonization furnace, raise the temperature to 700°C at a rate of 1°C / min under the protection of argon, keep the temperature for 2 hours, and cool naturally to room temperature to obtain a polyfurfuryl alcohol-based composite carbon film. Using polyfurfuryl alcohol-based composite carbon membranes for gas separation, H 2 , CO 2 , O 2 , N 2 and CH 4 The permeation fluxes were 58.6, 7.5, 1.46, 0.13, and 0.06 Barrer, H 2 / N 2 , CO 2 / N 2 , O 2 / N 2 and CO 2 / CH 4 The separation coefficients were 449.1...

Embodiment 3

[0020] Put 96g of furfuryl alcohol and 4g of p-toluenesulfonic acid into a three-necked flask equipped with a condenser, and start the stirrer to react in an oil bath at 40°C for 3 hours. After the reaction was complete, the product was cooled to room temperature in a test tube. A coal-based carbon tube with an average pore size of 0.3 μm was selected as the support body, and a uniform polymer film was coated on the surface of the support body by the dip coating method. Put it into a carbonization furnace, raise the temperature to 700°C at a rate of 1°C / min under the protection of argon, keep the temperature at a constant temperature for 2 hours, and naturally cool to room temperature to obtain a polyfurfuryl alcohol-based composite carbon film. Using polyfurfuryl alcohol-based composite carbon membranes for gas separation, H 2 , CO 2 , O 2 , N 2 and CH 4 The permeation fluxes were 227.8, 22.9, 7.7, 0.89 and 0.25 Barrer, H 2 / N 2 , CO 2 / N 2 , O 2 / N 2 and CO 2 / CH...

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Abstract

The invention relates to a method for preparing compound carbon film, especially providing the method for preparing poly-furfuryl alcohol carbon film. It is characterized in that: it uses furfuryl alcohol as raw material, via catalyst to polymerize the poly-furfuryl alcohol to be plated on porous support to form a coat; than drying can carbonizing to prepare compound carbon film. The invention can solve the problems of high cost, lower mechanical strength and complex process in preparing carbon film. And said invention has lower cost, simple process and the application for industry production.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a preparation method of a composite carbon membrane, in particular to a preparation method of a polyfurfuryl alcohol-based composite carbon membrane. Background technique [0002] As a high-efficiency and energy-saving separation, purification and purification technology, membrane separation has developed rapidly in the past 30 years. Carbon membrane is a new type of membrane separation material. It is a membrane material prepared by high-temperature pyrolysis of carbon-containing substances to meet the purpose of separation. It has the advantages of high separation selectivity, thermal stability, and chemical stability. , has been highly valued by researchers all over the world (J.Membr.Sci.2001, 193:1-18). At present, the carbon membrane precursor materials that show excellent performance in gas separation are mainly polyimide (Ind. Eng. Chem. Res., 1996, 35: 2999-3003), p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/52B01D69/12
Inventor 王同华宋成文邱介山
Owner DALIAN UNIV OF TECH
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