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Preparation method of silicate glass hollow fiber membrane

A technology of silicate glass and fiber membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high preparation cost and complicated process, and achieve the effect of simple preparation method and low process cost

Active Publication Date: 2012-09-26
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is to modify the porous glass membrane on the basis of its preparation to improve the separation coefficient of the membrane. The pore size of the glass membrane is concentrated at the nanometer level, and the application is also concentrated in the field of gas separation, and the process is more complicated and the preparation cost is relatively high. high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 90 grams of solid paraffin with a melting point of 40°C, mix it with 10 grams of liquid paraffin with a viscosity of 1 centipoise, and then heat at 40°C, stirring continuously during the heating process until the solid paraffin is completely melted and melted with the liquid paraffin One, the viscosity of the melt at this time is 10 poise.

[0028] SiO 2 The silicate glass capillary with a content of 60wt% was put into the melt, and was taken out from the melt after its surface was completely covered by the wax layer to obtain a glass capillary with a surface wax layer thickness of 1 mm.

[0029] The sodium chloride particles are sieved, and the particle size ranges from 20 to 100 mesh, and the sodium chloride particles are adhered to the wax layer on the surface of the glass capillary.

[0030]The glass capillary with sodium chloride particles stuck on the surface wax layer was immersed in water for 30 minutes, the sodium chloride particles were completely dissol...

Embodiment 2

[0034] Take 20 grams of solid paraffin with a melting point of 70°C, mix it with 80 grams of liquid paraffin with a viscosity of 30 centipoise, and then heat at 70°C, stirring continuously during the heating process until the solid paraffin is completely melted and melted with the liquid paraffin One, the viscosity of the melt at this time is 0.1 poise.

[0035] SiO 2 The quartz glass capillary with a content of 100wt% was put into the melt, and was taken out from the melt after its surface was completely wrapped by the wax layer to obtain a glass capillary with a surface wax layer thickness of 0.1 mm.

[0036] The sodium chloride particles are sieved, and the particle size ranges from 100 to 200 mesh, and the sodium chloride particles are adhered to the wax layer on the surface of the glass capillary.

[0037] The glass capillary with sodium chloride particles stuck on the above surface wax layer was immersed in water for 5 minutes, the sodium chloride particles were complet...

Embodiment 3

[0041] Take 40 grams of solid paraffin with a melting point of 50°C, mix it with 60 grams of liquid paraffin with a viscosity of 15 centipoise, and then heat it at 50°C, stirring continuously during the heating process until the solid paraffin is completely melted and melted with the liquid paraffin One, the viscosity of the melt at this time is 4 poise.

[0042] SiO 2 A quartz glass capillary with a content of 80wt% was put into the melt, and was taken out from the melt after its surface was completely wrapped by the wax layer to obtain a glass capillary with a surface wax layer thickness of 0.4 mm.

[0043] The sodium chloride particles are sieved, and the particle size ranges from 100 to 150 mesh, and the sodium chloride particles are adhered to the wax layer on the surface of the glass capillary.

[0044] The glass capillary with sodium chloride particles stuck on the surface wax layer was immersed in water for 15 minutes, the sodium chloride particles were completely dis...

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Abstract

The invention discloses a preparation method of a silicate glass hollow fiber membrane, which comprises the following steps: mixing and melting liquid paraffin and solid paraffin, and putting a silicate glass capillary into the melt to coat a paraffin layer on the glass capillary surface; attaching sodium chloride particles with a certain particle size range onto the paraffin layer on the glass capillary surface, and immersing the glass capillary into water until the sodium chloride particles are completely dissolved, thereby forming a porous structure on the paraffin layer on the glass capillary surface; immersing the glass capillary with a porous paraffin layer on the surface into a 5-30 wt% HF water solution to perform etching, thereby obtaining pores with pore sizes of 5-100 mu m on the silicate glass capillary surface; and calcining the glass capillary at 300-600 DEG C to lose the paraffin layer on the surface by burning, thereby finally obtaining the silicate glass hollow fiber membrane. The preparation method disclosed by the invention is simple, has the advantage of low technical cost, and can obtain the silicate glass hollow fiber membrane with the surface pore sizes of 5-100 mu m.

Description

technical field [0001] The invention relates to a preparation method of a silicate glass hollow fiber membrane which can be used for water treatment. Background technique [0002] Glass hollow fiber membrane is a kind of inorganic hollow fiber membrane. Compared with polymer hollow fiber membranes, it has the advantages of high temperature resistance, microbial pollution resistance, stable chemical properties, non-toxicity and high mechanical strength. Compared with inorganic membranes such as ceramic membranes and carbon membranes, glass hollow fiber membranes have a large pore specific surface area, narrow pore size distribution, and uniform pore structure, so they are increasingly used in the field of gas separation. [0003] There are generally three preparation methods for glass hollow fiber membranes: 1) preparation of glass hollow fiber membranes by crystallization and acid leaching; 2) surface modification with organic and inorganic substances on the surface of glas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/04B01D69/08B01D67/00
Inventor 张亚彬肖长发高小元徐乃库安树林
Owner TIANJIN POLYTECHNIC UNIV
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