A membrane surface composite material

A composite material, membrane surface technology, applied in the field of porous ceramic membranes, can solve the problems of poor filtration accuracy, insufficient separation, uneven pore size distribution, etc., and achieve the effects of small pore size, excellent separation accuracy, and uniform distribution.

Active Publication Date: 2020-12-01
广西碧清源环保投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the current silicon carbide ceramic membranes are formed by the accumulation and sintering of coarse silicon carbide and binders. The separation of colloidal particles and bacteria is very effective, but there are serious deficiencies in the separation of small molecule solutes, viruses, etc. The uneven pore size distribution and excessive pore size lead to poor filtration accuracy, which greatly limits the use of ceramic membranes in applications requiring high separation accuracy. Applications in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A membrane surface composite material, comprising an intermediate transition layer and a ceramic membrane layer successively arranged on the surface of a ceramic membrane support body, the intermediate transition layer is a SiC coarse-porous membrane layer, and the average pore diameter of the intermediate transition layer is 500nm; the ceramic membrane layer is porous pure SiC membrane layer, the average pore diameter of the ceramic membrane layer is 1.2nm.

[0026] The film surface composite material of this embodiment is prepared by the following method:

[0027] (1) Preparation of intermediate transition layer

[0028] (1.1) Mix silicon carbide powder, polycarbosilane, hydroxymethyl cellulose ether and water in a mass ratio of 5:2:0.2:10, the particle size of the silicon carbide powder is 1 μm to 5 μm, and the carbonized Silicon paste;

[0029] (1.2) uniformly spray the silicon carbide-containing slurry obtained in step (1.1) on the surface of the flat ceramic mem...

Embodiment 2

[0035] A membrane surface composite material, comprising an intermediate transition layer and a ceramic membrane layer successively arranged on the surface of a ceramic membrane support body, the intermediate transition layer is a SiC coarse-porous membrane layer, and the average pore diameter of the intermediate transition layer is 250nm; the ceramic membrane layer is porous pure SiC membrane layer, the average pore diameter of the ceramic membrane layer is 1.2nm.

[0036] The film surface composite material of this embodiment is prepared by the following method:

[0037] (1) Preparation of intermediate transition layer

[0038] (1.1) Mix silicon carbide powder, polycarbosilane, hydroxymethyl cellulose ether and water in a mass ratio of 5:1:0.1:10, the particle size of silicon carbide powder is 1 μm to 2 μm, and the carbonized Silicon paste;

[0039] (1.2) uniformly spray the silicon carbide-containing slurry obtained in step (1.1) on the surface of the multi-channel tube c...

Embodiment 3

[0045] A membrane surface composite material, comprising an intermediate transition layer and a ceramic membrane layer successively arranged on the surface of a ceramic membrane support body, the intermediate transition layer is a SiC coarse-porous membrane layer, and the average pore diameter of the intermediate transition layer is 250nm; the ceramic membrane layer is porous pure SiC membrane layer, the average pore diameter of the ceramic membrane layer is 1.5nm.

[0046] The film surface composite material of this embodiment is prepared by the following method:

[0047] (1) Preparation of intermediate transition layer

[0048](1.1) Mix silicon carbide powder, polycarbosilane, hydroxymethyl cellulose ether and water in a mass ratio of 5:1:0.1:10, the particle size of silicon carbide powder is 1 μm to 2 μm, and the carbonized Silicon paste;

[0049] (1.2) uniformly spray the silicon carbide-containing slurry obtained in step (1.1) on the surface of the single-channel tube c...

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Abstract

The invention discloses a membrane surface composite material. The membrane surface composite material comprises an intermediate transition layer and a ceramic membrane layer which are arranged on the surface of a ceramic membrane support body in sequence, wherein the intermediate transition layer is an SiC coarse pore membrane layer, and the average pore diameter of the intermediate transition layer is 100 nm-500 nm; the ceramic membrane layer is a porous pure SiC membrane layer, and the average pore diameter of the ceramic membrane layer is 1 nm-2 nm. The membrane surface composite material is provided with atomic-size pores which are distributed uniformly, so that the separation precision is high, and the membrane surface composite material further has the advantages of resistance to high temperature, resistance to acid and base and the like.

Description

technical field [0001] The invention relates to the technical field of porous ceramic membranes, in particular to a membrane surface composite material. Background technique [0002] The membrane separation process is that the liquid containing dissolved solutes or suspended particles passes through the membrane, in which the solvent and solute small molecules pass through the membrane, and the solute macromolecules and suspended particles are retained by the membrane. Compared with organic membranes, inorganic ceramic membranes are precision ceramic materials with certain selective separation properties, which are made of metal oxide or mixed metal oxide powders sintered at high temperature. They have good chemical stability, high mechanical strength, and antimicrobial properties. Strong capacity, high temperature resistance, narrow pore size distribution, high separation efficiency, etc., can be used in gas separation, liquid separation and purification and membrane reacto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/12B01D67/00
CPCB01D67/0039B01D67/0072B01D69/12B01D71/02B01D2311/2649
Inventor 秦玉兰高明河黄付平代晋国马永秦键滨
Owner 广西碧清源环保投资有限公司
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