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Method for preparing flat ceramic membranes by means of compression molding and product prepared by aid of method

A press molding and ceramic membrane technology, which is applied in the field of flat ceramic membrane preparation, can solve the problems of complex process and easy deformation of membrane parts, and achieve the effects of easy control of operating conditions, small deformation of membrane parts and low cost

Inactive Publication Date: 2018-11-27
重庆兀盾纳米科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for the preparation of asymmetric flat ceramic membranes by pressing and forming with simple process, low cost, easy control of operating conditions and high production efficiency. The flat ceramic membrane support body, and then the asymmetric flat ceramic membrane is obtained by firing the coating film and combining and assembling, so as to effectively solve the problems of easy deformation and complicated process of the membrane in the prior art

Method used

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  • Method for preparing flat ceramic membranes by means of compression molding and product prepared by aid of method

Examples

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Effect test

Embodiment 1

[0027] A kind of preparation method of flat ceramic film compression molding of present embodiment, such as figure 1 As shown, the steps are as follows:

[0028] (1) Use alumina powder with an average particle size of 50 μm as raw material, add water in an amount of 8wt% of the alumina powder, and 0.5wt% polyvinyl alcohol solution (concentration is 5wt%), after mixing, stale 1. After granulation, under a pressure of 50 MPa, a flat ceramic membrane support body with a size of 300 x 100 x 1 mm in length and an arc-shaped outer edge (arc is π / 3) is pressed out, and the lower surface There are 39 convex strips with a height of 0.5 mm that are consistent with the length direction of the support and arranged side by side at intervals (the cross-section of the convex strips is as follows: figure 2 The one shown in a is an inverted trapezoid with a hypotenuse angle of 30°, a width of the bottom of 0.5mm, and a chamfering radian of the joint between the convex strip and the support b...

Embodiment 2

[0034] A kind of preparation method of flat ceramic film compression molding of present embodiment, such as figure 1 As shown, the steps are as follows:

[0035] (1) With the cordierite powder having an average particle diameter of 5 μm as a raw material, the amount of the cordierite powder added is 6wt% water, 5wt% starch, and 0.5wt% carboxymethyl cellulose solution (concentration is 10wt%) ), after mixing, aging, and granulation, under a pressure of 40MPa, press out a flat ceramic membrane support with a size of 600 x 200 x 1mm and an arc-shaped outer edge (radian 2π / 3) Green body, its lower surface is evenly distributed with 49 convex strips with a height of 1mm that are consistent with the length direction of the support and arranged side by side at intervals (the cross section of the convex strips is as follows: figure 2 The one shown in a is an inverted trapezoid, the trapezoid hypotenuse angle is 60°, the width of the bottom is 1mm, and the chamfering arc of the joint...

Embodiment 3

[0040] A kind of preparation method of flat ceramic film compression molding of present embodiment, such as figure 1 As shown, the steps are as follows:

[0041] (1) Using silicon carbide powder with an average particle size of 5 μm as a raw material, add water in an amount of 3wt% of the silicon carbide powder, 5wt% carbon powder, and 1wt% polyvinyl alcohol solution (concentration is 10wt%), After mixing, aging, and granulation, under a pressure of 20 MPa, a flat ceramic membrane support body with a size of 600 x 100 x 2mm and an arc-shaped outer edge (radian π / 3) was pressed out. There are 24 convex strips with a height of 2mm that are aligned with the length direction of the support body and arranged side by side at intervals evenly distributed on the lower surface (the cross section of the convex strips is as follows: figure 2 The square shown in b, the width of the bottom is 1mm, and the chamfering arc of the joint between the raised strip and the support body is π / 6); ...

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Abstract

The invention discloses a method for preparing flat ceramic membranes by means of compression molding. The method includes preparing flat ceramic membrane supports with a plurality of convex strips bythe aid of dry-press processes; preparing intermediate transition layers and top membranes on the ceramic membrane supports or only preparing a top membrane on each ceramic membrane support; formingpermeation channels between the convex strips in an adhesive packaging manner so as to obtain the asymmetric flat ceramic membranes. The invention further discloses a product prepared by the aid of the method for preparing the flat ceramic membranes by means of compression molding. The method and the product have the advantages that the method includes simple technologies and is low in cost and high in production efficiency, operation conditions are easy to control, and the problems of vulnerability to deformation of membrane components, complicated technologies and the like in the prior art can be effectively solved; the method is beneficial to improving the quality and application of the product, and the large-size flat ceramic membranes can be prepared by the aid of the method; the ceramic membrane product prepared by the aid of the method is high in flexural strength and excellent in separation performance and can be widely applied to the field of solid-liquid separation, liquid-liquid separation and the like; the method and the product are high in universality, favorable for industrial batch production and have broad application market prospects.

Description

technical field [0001] The invention relates to the technical field of ceramic membrane materials, in particular to a method for preparing a flat ceramic membrane and a product thereof. Background technique [0002] Ceramic membrane is an important part of high-performance membrane materials. Because of its high temperature resistance, chemical corrosion resistance, good mechanical strength, strong anti-microbial ability, large permeation flux, strong cleanability, narrow pore size distribution, and long service life, etc., It has been widely used in many industrial fields such as medicine, petroleum and chemical industry, food, environmental protection, metallurgy, etc., and has become one of the fastest-growing and most promising membrane materials in the membrane field. [0003] Classified according to the ceramic membrane structure and production process characteristics, the ceramic membrane can be divided into two types: tubular ceramic membrane and flat ceramic membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10C04B35/195C04B35/565C04B38/06
CPCC04B35/10C04B35/195C04B35/565C04B35/622C04B35/62222C04B38/0645C04B38/068C04B2235/349C04B2235/945C04B2235/96
Inventor 汪永清
Owner 重庆兀盾纳米科技有限公司
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