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Porous titanium/titanium dioxide nano tube composite flat sheet membrane and preparing method thereof

A nanotube composite, titanium dioxide technology, used in metal processing equipment, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve problems such as inability to achieve, achieve high porosity, large specific surface area, and good conductivity.

Inactive Publication Date: 2018-07-06
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are various preparation methods for titanium dioxide nanotubes, but none of them can achieve three-dimensional porous titanium film-based titanium dioxide nanotubes.

Method used

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  • Porous titanium/titanium dioxide nano tube composite flat sheet membrane and preparing method thereof
  • Porous titanium/titanium dioxide nano tube composite flat sheet membrane and preparing method thereof
  • Porous titanium/titanium dioxide nano tube composite flat sheet membrane and preparing method thereof

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preparation example Construction

[0027] A method for preparing a porous titanium / titanium dioxide nanotube composite flat film, comprising the following steps:

[0028] (1) Prepare casting solution, which is composed of the following components by weight percentage: 50-65% of titanium powder, 4-7% of binder, 0-1% of thickener, and the balance is solvent ;

[0029] (2) scraping the film, using the film-scraping method obtained in step (1) to obtain a wet film, and soaking the formed wet film in water until the solvent is fully separated out, then drying to obtain a film to be sintered;

[0030] (3) Sintering, sintering the film to be sintered obtained in step (2) under the protection of an argon atmosphere, the heating rate during sintering is 1-10°C / min, and the highest sintering temperature is 1000-1200°C, reaching the highest sintering temperature Finally, keep warm for 120-180min and cool naturally to obtain the film to be cleaned;

[0031] (4) cleaning, cleaning the film to be cleaned obtained in step (...

Embodiment 1～5

[0040] The formulations of Examples 1-5 and the pore size range of the porous titanium flat membrane are shown in Table 1 below.

[0041] The concrete sintering process parameter in the step (3) of embodiment 1~5 sees the following table 2, wherein T maxis the maximum sintering temperature, V is the heating rate, and t is the holding time.

[0042] The anodic oxidation process parameters and the diameter range of titanium dioxide nanotubes in the step (5) of Examples 1-5 are shown in Table 3 below, wherein U is the voltage, and t is the oxidation time.

[0043] Table 1 The formulations of Examples 1 to 5 and the pore diameter range of the porous titanium flat membrane

[0044]

[0045] Table 2 Concrete sintering process parameters in steps (3) of Examples 1 to 5

[0046]

[0047]

Embodiment 1

[0050] The surface scanning electron microscope picture of the porous titanium flat film that embodiment 1 obtains is as figure 1 As shown in the figure, it can be seen from the figure that the porous titanium flat membrane prepared by the preparation method provided by the present invention has a complete membrane structure and uniform pores after the raw titanium powder is sintered to form a membrane.

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Abstract

The invention provides a porous titanium / titanium dioxide nano tube composite flat sheet membrane and a preparing method thereof. The preparing method comprises the following steps that firstly, membrane casting liquid is prepared and comprises following components including, by weight percent, 50%-65% of titanium powder, 4%-7% of a binding agent, 0%-1% of a thickening agent and the balance solvents; secondly, membrane scraping is conducted; thirdly, sintering is conducted; fourthly, cleaning is conducted; fifthly, anodic oxidation is conducted, and a porous titanium flat sheet membrane obtained in the fourth step is subjected to anodic oxidation in a fluorine ion containing organic solution system; and sixthly, heat treatment is conducted, a sample obtained after anodic oxidation in the fifth step is subjected to heat treatment at the temperature ranging from 400 DEG C to 600 DEG C, and the porous titanium / titanium dioxide nano tube composite flat sheet membrane is obtained. The composite flat sheet membrane obtained through the porous titanium / titanium dioxide nano tube composite flat sheet membrane and the preparing method of the porous titanium / titanium dioxide nano tube composite flat sheet membrane can be applied to a filter system and can also be used in the catalysis aspect, operation is simple, cost is low, and industry production can be achieved.

Description

technical field [0001] The invention belongs to the field of porous metal materials, in particular to a porous titanium / titanium dioxide nanotube composite flat film and a preparation method thereof. Background technique [0002] Porous metal membranes are materials that rely on the gaps between powder particles to separate substances. Porous metal membranes originated in the 1940s, and stainless steel membranes developed rapidly in the 1990s. Later, they were used as separation membranes due to their superior performance. [0003] The porous metal membrane integrates the large porosity and specific surface area of ​​the porous metal. The characteristics of the metal make it have the advantages of high strength and easy cleaning of the ceramic membrane, so it can be used in membrane separation. It has functional characteristics that ordinary metal materials or other separation membranes do not have in terms of chemistry and thermodynamics, and has broad application prospects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B22F3/11B22F3/22B22F1/00
CPCC25D11/26B22F3/114B22F3/22B22F1/107
Inventor 康建立赵骏乔志军张志佳
Owner TIANJIN POLYTECHNIC UNIV
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