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Preparation method of porous nickel hollow fiber membrane and porous nickel hollow fiber membrane prepared by same

A technology of fiber membrane and porous nickel, which is applied in the field of hollow fiber membrane and its preparation process, can solve problems such as differences in process parameters and sintering process parameters, and achieve the effects of high product quality, light weight and simple method

Inactive Publication Date: 2015-12-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for metal porous membranes, due to the different properties of different metals, the process parameters, especially the sintering process parameters, are also very different.

Method used

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  • Preparation method of porous nickel hollow fiber membrane and porous nickel hollow fiber membrane prepared by same
  • Preparation method of porous nickel hollow fiber membrane and porous nickel hollow fiber membrane prepared by same
  • Preparation method of porous nickel hollow fiber membrane and porous nickel hollow fiber membrane prepared by same

Examples

Experimental program
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Effect test

specific Embodiment approach

[0028] A kind of preparation method of porous nickel hollow fiber membrane is characterized in that described method comprises the following steps:

[0029] 1) Configure casting solution

[0030] After mixing all the components in the formulation of the casting solution, heat it in a water bath to 70° C. and stir until they are evenly mixed to obtain the casting solution.

[0031] 2) Preparation of porous nickel hollow fiber membrane precursor

[0032] The casting solution obtained in the above step 1) is spun by a dry-wet method (NIPS) to obtain a porous nickel hollow fiber membrane precursor; Soak in pure water until the solvent is fully separated out, the soaking time is 24 hours, and dry the soaked primary fiber at room temperature to obtain a porous nickel hollow fiber membrane precursor.

[0033] 3) Sintering

[0034] The porous nickel hollow fiber membrane precursor obtained in step 2) is sintered, and the heating rate during sintering is V°C / min;

[0035] When the ...

Embodiment 1～6

[0045] The formula of embodiment 1~6 sees the following table (all solvents all adopt NMP, thickener all adopts PVP, and binding agent all adopts PAN)

[0046]

[0047] Step 3) of all embodiments 1 to 6) Concrete sintering process is as follows

[0048]

[0049]

[0050] Note: during the sintering process of Examples 1 and 6, the sintering temperature reaches T 1 The same sintering atmosphere is used before and after, and when T 1The heating rate before was 3°C / min, and then the heating rate was 5°C / min. Aperture refers to 95% aperture distribution range in this table, and aperture distribution detection shows that the average maximum aperture of the porous nickel fiber membrane obtained in embodiment 1-6 does not exceed the upper limit of the aperture range listed in the table (i.e. no large hole)

[0051] When DMF, EC, and DMAc are used to replace NMP in the examples, porous nickel hollow fiber membranes can also be obtained.

[0052] The porous nickel hollow fi...

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Abstract

The invention discloses a preparation method of porous nickel hollow fiber membrane and a porous nickel hollow fiber membrane prepared by the same. The preparation method comprises the following steps: (1) preparing a membrane casting liquid by evenly mixing the following components together: 35 to 55% of nickel powder with a diameter of 0.5-50 [mu]m, 5 to 10% of binder, 0 to 1% of thickening agent, and the balance being a solvent; (2) preparing a porous nickel hollow fiber membrane precursor by spinning the membrane casting liquid obtained in the step (1) through a dry-wet spinning (NIPS) process; (3) sintering the porous nickel hollow fiber membrane precursor obtained in the step (2), wherein the temperature rising speed is controlled at 1 to 8 DEG C / min in the initial stage of sintering, and the highest temperature of sintering is in a range of 900 to 1100, maintaining the temperature for 0 to 150 minutes after the highest temperature of sintering is reached, and naturally cooling to obtain the porous nickel hollow fiber membrane.

Description

technical field [0001] The invention relates to a hollow fiber membrane and a preparation process thereof, in particular to a hollow fiber membrane made of porous metal and a preparation process thereof. technical background [0002] Porous metal membranes first appeared in the 1940s, and then stopped because of the preparation process. Porous metal membranes are materials that rely on the gaps between powder particles to separate substances, and the common pore size ranges from 0.1 μm to 10 μm. There are two types of porous metal membranes: flat membrane and tubular membrane. Compared with flat membrane, tubular membrane has incomparable advantages in industrial applications such as water treatment. In addition, the tubular porous metal membrane also has metal characteristics such as high strength, good toughness, high temperature resistance, and strong electrical conductivity. However, there is no mature theory for preparing tubular membranes from inorganic membranes. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/08B01D67/00
Inventor 康建立任增英李建新
Owner TIANJIN POLYTECHNIC UNIV
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