Interphase carbon microball base tube type charcoal film and its preparation method

Abstract

The present invention belongs to the field of preparation technology of separation material, and relates to an intermediate phase carbon microsphere basal tube type carbon membrane and its preparation method. Said method includes the following steps: (1), firstly, adopting copolycondensation method, catalytic condensation method or emulsion method to prepare intermediate phase carbon micropheres whose grain size is 5-40 micrometer, then screening according to requirement of subsequent procedure so as to obtain intermediate phase carbon microspheres with different grain size distribution; (2), under the condition of normal temperature placing the intermediate phase carbon microspheres with a certain grain size distribution and binding agent into a mixing device together, and uniformly mixing them, then placing the mixed material into a continuous extrusion forming machine, regulating pressure to obtain tubular raw membrane; and (3), naturally drying said raw membrane by airing, under the condition of inert gas protection or air isolation carbonizing said raw membrane in carbonizing oven so as to obtain the invented product whose average pore size is 0.1-0.3 micrometer.

Description

Technical field [0001] The invention relates to a mesophase carbon microsphere-based tubular carbon membrane and a preparation method thereof, and belongs to the technical field of preparation of separation materials. Background technique [0002] Carbon membrane is a porous inorganic separation membrane, which is made by high-temperature pyrolysis of carbon-containing materials. Compared with traditional organic film, carbon film has light specific gravity, acid and alkali resistance, organic solvent resistance, good heat transfer and electrical conductivity, heat shock resistance, wear resistance, self-lubricity, mechanical processing and biocompatibility. , Large anisotropy, high separation ability and good cleaning state. It has broad application prospects in gas separation and recovery, corrosive solution separation and sewage treatment. [0003] Carbon membranes are classified into three types: flat type, fiber type and tube type according to their shape. Due to the inevita...

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Problems solved by technology

[0004] However, the carbon content in the above-mentioned various raw materials is not very high, and the carbon residue rate of the raw materials after carbonization is directly related to the mechanical strength of the carbon membrane. At the same time, the irregular shape of the above-mentioned various raw materials will directly affect the pore size distribution and pore structure. , especially when the patent CA1490076A uses coal as a raw material, in order to obtain a suitable particle size, it is necessary to mix coal powder with water and quartz sand into a sand mill for fine processing, which makes the preparation process complicated and the cost of hole adjustment is high