Unlock instant, AI-driven research and patent intelligence for your innovation.

Once-formed preparation method of ceramic metal double-layer hollow fiber film

A ceramic metal, double-layer hollow technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low efficiency, many factors interfering with repeatability, cumbersome processing procedures, etc., and achieve high mechanical strength , controllable surface morphology, cost-saving effect

Inactive Publication Date: 2015-11-04
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing procedure in this way is cumbersome, the efficiency is low, and there are many factors that interfere with the repeatability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Once-formed preparation method of ceramic metal double-layer hollow fiber film
  • Once-formed preparation method of ceramic metal double-layer hollow fiber film
  • Once-formed preparation method of ceramic metal double-layer hollow fiber film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1α-Al 2 o 3 Preparation of / 316 stainless steel double-layer hollow fiber

[0032] Step 1, dissolve PVP (polyvinylpyrrolidone) and PES (polyethersulfone resin) in NMP (N-methylpyrrolidone), and then mix with α-alumina powder (using α-Al with D50=0.1mm 2 o 3 The particles were ground into) and mixed, put into a sealed jar and ball milled for 48 hours to obtain a ceramic slurry. The mass composition of the ceramic slurry is 67.4NMP:20A1 2 o 3 :1.8PVP:10.8PES.

[0033] Stainless steel powder (ground with 316 stainless steel particles with D50=10 μm) was mixed into PES NMP solution, and ball milled for 48 hours to prepare stainless steel slurry. The mass composition of the stainless steel slurry is 27NMP:65.5SS:7PES:0.5H 2 O.

[0034] Step 2, the obtained ceramic slurry and stainless steel slurry are degassed at room temperature in a vacuum environment for 10 hours, and then the degassed slurry and deionized water as a non-solvent core liquid are respectivel...

Embodiment 2

[0038] The preparation of embodiment 2YSZ / 420 stainless steel double-layer hollow fiber

[0039] Experimental procedure is identical with embodiment 1, and difference is: step 1, stabilizes ZrO with 5% Y of D50=0.06 μ m 2 Particle-ground ZrO 2 The powder replaces the α-alumina powder, and the stainless steel powder is ground into 420 stainless steel particles with D50=10 μm. The mass composition of the ceramic slurry is 38.4NMP:52YSZ:1.8PVP:7.8PES; step 2, the core fluid is squeezed into the speed 8ml / min , the extrusion speed of the outer layer slurry is 0.2ml / min, and the water entry distance is 5cm; step 4, the sintering temperature is 1250oC, the sintering time is 3.5 hours, and the protective atmosphere adopts 5% H 2 and 95%N 2 of mixed gas.

[0040] The cross-sectional morphology of the obtained hollow fiber precursor is as follows: Figure 3-5 shown. image 3 is the cross-sectional appearance of the obtained hollow fiber before firing, the thickness of the stainles...

Embodiment 3

[0041] Example 3CeO 2 Preparation of / 420 stainless steel double-layer hollow fiber

[0042] Experimental procedure is identical with embodiment 1, difference is: step 1, with the CeO of D50=0.05 μm 2 Granular ground CeO 2 The powder replaces the α-alumina powder, the stainless steel powder is ground with D50=10μm 420 stainless steel particles, and the mass composition of the ceramic slurry is 49.4NMP:42CeO 2 : 1.8PVP: 6.8PES; step 2, core liquid extrusion speed 5ml / min, outer layer slurry extrusion speed 0.1ml / min, water entry distance 5cm; step 4, sintering temperature 1150oC, sintering time 4 hours, protective atmosphere 5%H 2 and 95%N 2 of mixed gas.

[0043] Figure 6 It is the scanning electron microscope morphology of the outer surface of the membrane after sintering. It can be seen that the surface is smooth and the pore size is about 200nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a once-formed preparation method of a ceramic metal double-layer hollow fiber film. According to the method, a phase inversion method is firstly adopted for preparing a ceramic metal double-component hollow fiber precursor, and then the precursor is subjected to high-temperature sintering to obtain the ceramic metal double-component hollow fiber film. The preparation of the precursor comprises the following steps: (1) respectively preparing a ceramic slurry and a metal slurry; (2) degassing the slurries; (3) putting the ceramic slurry, the metal slurry and a core liquid into a high-pressure injection container for extrusion forming; (4) soaking by using a nonsolvent phase to obtain a product; and (5) performing linear fixing forming on the product and drying. According to the method disclosed by the invention, the ceramic metal double-component hollow fiber precursor is prepared once by adopting the phase inversion method, and then a high-temperature sintering method is combined, so that ceramic metal double-component hollow fibers are obtained; the operation is simplified; the cost is reduced; the obtained ceramic metal double-component hollow fibers are in an asymmetric structure, and have the high mechanical strength, uniform and adjustable surface pore diameters, hydrophily and hydrophobicity.

Description

technical field [0001] The invention relates to the technical field of chemical separation, in particular to a preparation method of an inorganic hollow fiber membrane. Background technique [0002] The separation of mixed gas or mixed liquid has always occupied a large proportion of investment and energy consumption in the industrial production process. Traditional separation methods include pressure swing adsorption and cryogenic separation for gas separation, as well as distillation and (pressure swing) rectification for liquid phase. Compared with traditional separation technology, membrane separation technology has many significant advantages such as high efficiency, low energy consumption and small investment, and has broad application prospects in the fields of gas separation and liquid separation. A variety of membrane separation processes have been commercialized, such as seawater desalination and wastewater treatment. [0003] The polymer film is widely used at t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/08B01D69/02B01D67/00
Inventor 曾高峰张延风刘家鹏张建明李猛胡登孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI