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Preparation method of ultrafiltration device

A technology of ultra-fine filtration and devices, applied in membrane filters, chemical instruments and methods, filtration and separation, etc., can solve the problems of poor wear resistance, high cost, poor chemical stability, etc., and achieve simple process, low cost, and easy industrialization effect

Active Publication Date: 2018-06-05
SUZHOU FIRST ELEMENT NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the pure ceramic filter material is a filter material widely used in the market. It has the characteristics of stable chemical properties, good wear resistance, no peculiar smell when used in food industry filtration, and easy cleaning. However, it also has high brittleness and low impact resistance. Disadvantages such as high difficulty and large proportion
Pure metal filter materials mostly use alloy steel, titanium alloy and other high-melting point metals, which generally have the disadvantages of heavy weight, high cost, and poor corrosion resistance.
The polymer filter material has low mechanical strength, poor wear resistance and poor chemical stability

Method used

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  • Preparation method of ultrafiltration device
  • Preparation method of ultrafiltration device
  • Preparation method of ultrafiltration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using LY12 aluminum alloy: powder P1 with an average particle size of 500nm, and powder P2 with an average particle size of 150nm, the above aluminum alloys were mixed with PEG and stearic acid in a mass ratio of 98.4:0.6:1 to obtain P1 composite powder and P2 composite powder.

[0032] The secondary molding is formed to obtain a porous aluminum alloy product with an inner diameter of 100 mm, an inner layer composed of P1 composite powder and a thickness of 5 mm; an outer layer composed of P2 composite powder and a thickness of 20 μm, such as figure 1 shown.

[0033] The above-mentioned porous aluminum alloy filter tube is degreased, and then the boric acid solution of sodium sulfite and potassium hydroxide is used as the electrolyte, and the above-mentioned aluminum alloy filter tube is completely immersed in the electrolyte as the positive electrode, and metal lead is immersed in the electrolyte as the negative electrode. 60A / dm2, energized time 20min, uniformly form...

Embodiment 2

[0036] Weigh the raw materials according to the ratio of alumina powder to ammonium bicarbonate is 80:20, wherein the alumina powder is spherical with an average particle size of 60nm, and the average particle size of ammonium bicarbonate is 15nm. The alumina powder and the ammonium bicarbonate powder are ball-milled in an argon atmosphere to obtain a composite powder in which the alumina powder and the ammonium bicarbonate powder are evenly dispersed. Then, under the protection of argon, adopt the plasma spraying technology, the above-mentioned composite powder is repeatedly sprayed on the surface of the ultrafine filter part obtained in Example 1, then stand in boiling water for 1h, after the ammonium bicarbonate dissolves and detaches, in the implementation Example 1 A uniform and compact aluminum oxide nano-ceramic filter layer (Fig. 3) was obtained on the surface of the workpiece, with a filter hole diameter of about 10 nm and a porosity of about 38%.

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Abstract

The invention relates to the field of metal material formation and surface treatment, in particular to a preparation method of an ultrafiltration device. Low-melting-point light metal powder serves asa raw material, a porous light metal part is prepared by a powder metallurgy technology and then subjected to immersed oxidation, all open hole surfaces (capable of contacting with liquid or gas) ofthe porous pure metal part are uniformly oxidized into corrosion-resistant metal oxide, and metal surfaces are vitrified to form the novel high-strength light corrosion-resistant odorless ultrafiltration device.

Description

technical field [0001] The invention relates to the field of forming and surface treatment of metal materials. Background technique [0002] Common filter materials currently on the market include ceramic materials, metal materials, and polymer materials. Among them, the pure ceramic filter material is a filter material widely used in the market. It has the characteristics of stable chemical properties, good wear resistance, no peculiar smell when used in food industry filtration, and easy cleaning. However, it also has high brittleness and low impact resistance. Difficulty is big, specific gravity etc. shortcoming. Alloy steel, titanium alloy and other high-melting-point metals are mostly used as pure metal filter materials, which generally have the disadvantages of heavy weight, high cost, and poor corrosion resistance. The polymer filter material has low mechanical strength, poor wear resistance and poor chemical stability. The market urgently needs a filter material w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06B22F3/11B22F3/24C23C4/11B01D39/20
CPCB01D39/2051B01D2239/0668B01D2239/10B01D2239/1216B22F3/24B22F7/002B22F2003/242B22F2999/00C23C4/11B22F2207/13
Inventor 肖伟李红董明
Owner SUZHOU FIRST ELEMENT NANO TECH
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