Preparation method of porous metal film

A porous metal and metal membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of large holes in metal membranes, and achieve low cost, low wastewater production, and high permeability Effect

Inactive Publication Date: 2019-05-14
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a porous metal film to solve the problem that the metal film prepared by the existing wet spraying molding method has many large holes

Method used

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  • Preparation method of porous metal film

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preparation example Construction

[0033] A kind of preparation method of porous metal film of the present invention specifically comprises the following steps:

[0034] Step 1, weigh the following components according to the mass percentage, binder 3-10%, dispersant 0.5-1%, defoamer 0.05-0.3%, the rest is deionized water, the mass percentage of the above components sum to 100%;

[0035] Step 2, mixing and dissolving the weighed binder, dispersant, defoamer and deionized water to obtain a slurry;

[0036] Step 3, pour the metal powder and the slurry prepared in step 2 into the stirring tank according to the mass ratio 1: (0.8-1.5), and mix evenly to obtain a mixed solution; the working pressure of the stirring tank is 0.05MPa-0.3MPa, wherein The metal powder is stainless steel powder, nickel powder, titanium powder, copper powder, iron-aluminum alloy powder, or titanium-aluminum alloy powder, and the average particle size of the metal powder is 200nm-100μm;

[0037] Step 4, using a spray gun to spray the mixe...

Embodiment 1

[0047] A preparation method of a porous stainless steel membrane, specifically comprising the following steps:

[0048] Step 1, take the following components respectively according to mass percentage, 3g polyvinylpyrrolidone, 0.75g sodium hexametaphosphate, 0.25g defoamer and 96g deionized water;

[0049]Step 2, dissolve the polyvinylpyrrolidone, sodium hexametaphosphate and defoamer weighed in step 1 in deionized water, stir at a low speed, and wait until the polyvinylpyrrolidone, sodium hexametaphosphate and defoamer are completely dissolved to obtain a slurry material;

[0050] Step 3: Pour 100g of the slurry prepared in Step 2 into a mixing tank, weigh 100g of 316LSS stainless steel spherical powder with an average particle size of 1.25μm, add it to the mixing tank, stir and disperse at a high speed for 15 minutes, and then prepare the mixed solution, add to the mixing tank Press until the internal pressure of the mixing tank is 0.1MPa;

[0051] Step 4, using an automati...

Embodiment 2

[0055] A preparation method of a porous stainless steel membrane, specifically comprising the following steps:

[0056] Step 1, take the following components respectively according to mass percentage, 5.7g polyvinylpyrrolidone, 1g sodium hexametaphosphate, 0.3g defoamer and 93g deionized water;

[0057] Step 2, dissolve the polyvinylpyrrolidone, sodium hexametaphosphate and defoamer weighed in step 1 in deionized water, stir at a low speed, and wait until the polyvinylpyrrolidone, sodium hexametaphosphate and defoamer are completely dissolved to obtain a slurry material;

[0058] Step 3: Pour 100 g of the slurry prepared in Step 2 into a mixing tank, weigh 120 g of 316LSS stainless steel spherical powder with an average particle size of 2.5 μm, add it to the mixing tank, and stir and disperse at a high speed for 15 minutes to prepare a mixed solution, and add it to the mixing tank Press until the internal pressure of the mixing tank is 0.1MPa;

[0059] Step 4, using an autom...

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Abstract

The invention relates to a preparation method of a porous metal film. The preparation method specifically comprises the following steps: respectively weighing 3-10 percent by weight of bonding agent,0.45-1 percent by weight of dispersing agent, 0.05-0.3 percent of a de-foaming agent and the balance of deionized water, wherein the sum of the mass percents of the components is 100 percent; mixing and dissolving the weighted bonding agent, dispersing agent, de-foaming agent and deionized water to prepare slurry; pouring metal powder and the prepared slurry into a stirring tank according to the mass ratio of 1:(0.8-1.5) and uniformly mixing to prepare mixed liquid; spraying the prepared mixed liquid onto the surface of a rotary tubular porous metal supporting body by adopting a spray gun, disassembling a metal film after the completion of absorption and successively performing drying, degreasing and sintering treatment on the metal film to prepare the porous metal film. The porous metal film prepared by the preparation method provided by the invention is high in permeability, good in film layer uniformity, high in filtering precision and high in finished product rate.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a preparation method of a porous metal membrane. Background technique [0002] Membrane separation is a high-tech separation technology that has been rapidly developed and industrialized in the past 30 years. It has been widely used in food and medicine, energy and chemical industry, nuclear industry, electronics industry and environmental protection industry. For the performance of metal porous materials, requirements such as corrosion resistance, high temperature resistance, high mechanical strength, and high filtration accuracy are put forward, especially for membrane materials with a filtration accuracy of 0.1-2 μm. Traditional symmetric metal porous materials have uniform macropores, and it is difficult to ensure the dual requirements of high precision and high permeability. Therefore, asymmetric porous metal materials have been developed. Compared with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/10
Inventor 王耀辉徐龙朱安张晓晗
Owner WESTERN BAODE TECH CO LTD
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