A kind of preparation method of ceramic composite membrane

A ceramic composite membrane and ceramic particle technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of long preparation period, poor membrane adhesion, and high energy consumption, and achieve easy operation and stability. Good performance and low energy consumption

Active Publication Date: 2020-04-03
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of traditional nanofiltration membranes requires repeated preparation of multilayer ceramic membranes with particle sizes from large to small on the surface of the macroporous support, and each layer of ceramic membranes must be sintered, so the preparation cycle is long and energy consumption is high. Higher, the bonding force between the film layers is poor

Method used

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  • A kind of preparation method of ceramic composite membrane
  • A kind of preparation method of ceramic composite membrane

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preparation example Construction

[0011] Such as figure 1 Shown, the present invention is a kind of preparation method of ceramic composite membrane, and its steps are:

[0012] (1) Select ceramic particles with a particle size of 1 / 2-2 / 3 of the average surface pore size of the porous ceramic support, and add 0.05% to 20% by weight to the organic solvent or water based on the quality of the solvent or water used , and then based on the quality of the solvent or water, sequentially add 0.1% to 5% dispersant and 1% to 5% thickener in mass percentage to prepare a uniformly dispersed and stable suspension of ceramic particles;

[0013] (2) Immerse the cleaned porous ceramic support in the slurry prepared in step (1), and absorb the ceramic particles in the slurry in the pores on the surface of the porous ceramic support by using negative pressure; the pumped The negative pressure is 0.01~0.1MPa, and the soaking time is 10~300s. After soaking, wash off the excess ceramic particles attached to the surface;

[0014...

Embodiment 1

[0022] Example 1: Porous α-Al 2 o 3 Sheet-like ceramics are used as supports with a pore size of 3 μm.

[0023] (1) Using water as a solvent, based on water quality, add 1.7μm TiO with mass percentages of 2%, 0.5% and 1% respectively 2 Granules, polyethyleneimine, ethylcellulose and sodium carboxymethylcellulose (1:1wt) mixture, where polyethyleneimine is the dispersant, ethylcellulose and sodium carboxymethylcellulose (1:1wt) The mixture is a thickener;

[0024] (2) Immerse the cleaned porous ceramic support into the slurry prepared in step (1), and use negative pressure to remove the TiO in the slurry 2 Particles are adsorbed in the pores on the surface of the porous ceramic support; the negative pressure is 0.03MPa, the soaking time is 40s, and the excess Ti particles attached to the surface are cleaned after soaking;

[0025] (3) Select TiO with a particle size of 1.1 μm 2 Particles, repeat step (1), put the ceramic support containing Ti particles in step (2) into the...

Embodiment 2

[0028] Example 2: A porous tubular titanium oxide ceramic is used as a support body, and its pore diameter is 8 μm.

[0029] (1) With absolute ethanol as the solvent, based on the mass of absolute ethanol, 10%, 2% and 3% of 7.3μm Al 2 o 3 Particles, a mixture of polyethylene glycol, ethyl cellulose and polyvinyl alcohol (1:1wt), in which polyethyleneimine is a dispersant, and a mixture of ethyl cellulose and sodium carboxymethylcellulose (1:1wt) is an enhancer Thickener;

[0030] (2) Immerse the cleaned porous ceramic support into the slurry prepared in step (1), and use negative pressure to remove the Al in the slurry 2 o 3 Particles are adsorbed in the pores on the surface of the porous ceramic support; the negative pressure is 0.1MPa, and the soaking time is 80s. After soaking, the excess Al attached to the surface is cleaned. 2 o 3 particle;

[0031] (3) Select Al with a particle size of 3.5 μm 2 o 3 Particles, repeat step (1), the step (2) containing Al 2 o 3 Th...

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Abstract

The invention discloses a preparation method of a high-stability ceramic composite film. The preparation method includes steps of firstly, adding ceramic powder in organic solvent or water, wherein the grain diameter is 1 / 2-2 / 3 of average aperture of a surface of a supporting body; preparing stable and evenly dispersed metal particle suspending pulp through adding dispersing agent and thickening agent, placing a porous ceramic supporting body in the ceramic particle suspending pulp to carry out negative pressure pumping, soaking and absorption; making the ceramic particle enter a hole duct at the surface of the ceramic supporting body to fill the hole duct of the surface of the ceramic supporting body; secondly, repeating the cereamic particle suspending pulp preparation process and the negative pressure pumping and absorption process for 1-5 times, wherein the grain diameter of the ceramic particle applied every time is 1 / 2-2 / 3 of the grain diameter of the ceramic applied last time; at last, cleaning the surface of the modified ceramic supporting body, and placing the ceramic supporting body in a muffle furnace to sinter; generating a mixed ceramic film layer containing ceramic oxide.

Description

technical field [0001] The invention relates to the preparation technology of a ceramic composite membrane. Background technique [0002] Due to its small footprint, high separation efficiency, and no pollution to the environment, membranes are widely used in chemical, biological, pharmaceutical, energy, environment, metallurgy and other fields. Ceramic membranes are also widely used because of their uniform pore size distribution, high mechanical strength, good acid and alkali resistance and corrosion resistance. The preparation of traditional nanofiltration membranes requires repeated preparation of multilayer ceramic membranes with particle sizes from large to small on the surface of the macroporous support, and each layer of ceramic membranes must be sintered, so the preparation cycle is long and energy consumption is high. Higher, the bonding force between the film layers is poor. The invention has simple process, low energy consumption, and disperses the nano-membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/12B01D69/10B01D67/00
CPCB01D67/0039B01D69/10B01D69/12B01D71/02
Inventor 张栋强杨平李贵贤
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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