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Substrate induction method used for preparing ordered porous carbon film

A porous carbon, induction method, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as raising or paying attention to the influence of film-forming substrates

Inactive Publication Date: 2013-05-01
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the literature reports, the researchers used the smooth and dense glass or silicon wafer surface as the film-forming substrate, and no researcher proposed or noticed the influence of the properties and microstructure of the film-forming substrate on the final carbon film pore structure.

Method used

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  • Substrate induction method used for preparing ordered porous carbon film
  • Substrate induction method used for preparing ordered porous carbon film
  • Substrate induction method used for preparing ordered porous carbon film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0062] The precursor prepolymer is a mixture of phenol or resorcinol and formaldehyde, the molar ratio of formaldehyde to phenol is 0.8:1~2.5:1, and the molar ratio of triethyl orthoacetate to phenol is 0:1~0.8 : 1, the mole fraction ratio of surfactant to phenol is 0.003: 1~0.06: 1, under acidic or basic catalyst conditions, the precursor prepolymer solution is mixed with the surfactant solution, and then heated at 25 to 90 degrees Celsius , by mechanical stirring or magnetic stirring for 0.25 to 80 hours to make a mixed solution.

[0063] The solution is attached to the surface of the substrate by dipping or coating or pouring or dropping. The substrate is one of smooth, dense or porous glass or silicon or solid organic film or carbon or ceramic or stainless steel or alumina or polymer. species, dried at 10-120 degrees Celsius for 0.25-90 hours. A solid organic film was obtained. The organic membrane formed on the substrate can be removed to obtain an unsupported membrane,...

Embodiment approach 2

[0066] The phenolic resin and the organic surface active agent are added into the solvent ethanol and water to form a solution, and the molar fraction ratio of the surface active agent to the phenol is 0.003:1-0.06:1. At 25-90 degrees Celsius, stir mechanically or magnetically for 0.25-80 hours to prepare a mixed solution.

[0067] The solution is attached to the surface of the substrate by dipping or coating or pouring or dropping. The substrate is one of smooth, dense or porous glass or silicon or solid organic film or carbon or ceramic or stainless steel or alumina or polymer. species, dried at 10-100 degrees Celsius for 0.25-90 hours. A solid organic film was obtained. The organic membrane formed on the substrate can be removed to obtain an unsupported membrane, or a substrate-containing supported membrane.

[0068]The solid organic film obtained above is raised from room temperature to 400-1000°C at a rate of 0.2-5°C / min in a vacuum atmosphere or an inert atmosphere, an...

Embodiment 1

[0070] Make a solution with resorcinol, ethanol, catalyst hydrochloric acid (37%), and surfactant F127, prepare a mixed solution of triethyl orthoacetate and formaldehyde (37%) as an auxiliary agent, and add the above-mentioned resorcinol-containing solution dropwise. The phenol mixture was stirred at room temperature for 20 minutes. This solution separates into upper and lower layers, and after separation, the clear upper layer is discarded, leaving a lower brown solution rich in polymer phase.

[0071] The solution was formed into a wet film on the surface of the nylon filter as the substrate, dried at room temperature for 24 hours, and then put into a vacuum drying oven at 105° C. for 6 hours to solidify. A solid organic film is obtained on the substrate.

[0072] Put the solid organic film obtained above in an inert atmosphere with a nitrogen flow rate of 100mL / min, set the temperature rise program: from room temperature to 400°C at a rate of 2°C / min, keep the temperature...

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Abstract

The invention relates to a substrate induction method used for preparing an ordered porous carbon film. The method is characterized in that: a precursor is prepared into a solution, and is stirred and mixed with an organic surfactant solution; under substrate induction, through wet film formation, solvent evaporation, and drying, a solid organic film is obtained; after carbonization, the ordered porous carbon film is obtained. The carbon film has an average pore size of 0.7-100nm. The method comprises the steps that: 1, a film forming solution or sol is prepared; 2, film forming is carried out on a solid substrate; and 3, carbonization is carried out. According to the invention, the organic substance is adopted as the surfactant, and is mixed with the precursor solution; under a certain substrate induction effect, through processes such as solvent evaporation, self-assembling, drying, and carbonization, and through the adjustments on preparation process parameters, the porous carbon film with ordered pore channel structure is prepared, and the control over ordered porous carbon film order degree or regularity is realized.

Description

technical field [0001] The invention relates to a method for preparing ordered porous carbon materials, in particular to a matrix induction method for preparing ordered porous carbon membranes. The matrix-induced method for preparing ordered porous carbon membranes provided by the present invention includes the selection of organic precursors, the configuration of film-forming solutions, self-assembly and matrix-induced film formation, drying and pyrolysis processes to obtain a regular and ordered porous structure The carbon membrane preparation technology belongs to the technical field of porous carbon preparation and application. Background technique [0002] The microstructure of a material determines its macroscopic properties, and the properties determine its application. Therefore, the study of the relationship between the structure and properties of materials is listed as one of the four major chemical science problems in the 21st century [Xu Guangxian. Science Bulle...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00
Inventor 张兵吴永红孟繁妍于智学石毅
Owner SHENYANG POLYTECHNIC UNIV
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