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A kind of preparation method of polysulfone fiber membrane

A technology of fiber membrane and casting solution, which is applied in the fields of fiber treatment, fiber chemical characteristics, chemical instruments and methods, etc.

Active Publication Date: 2019-07-16
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, foreign countries involved in the preparation of polysulfone hollow fiber membranes for aircraft applications, the formulation of the casting solution and the parameters of the membrane-making process are kept secret, and domestic research in this area is still in a state of groping

Method used

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  • A kind of preparation method of polysulfone fiber membrane
  • A kind of preparation method of polysulfone fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: The formulation of the casting liquid and the parameters of the film-making process for the preparation of batch 01 silk.

[0009] The mass percentage of each component of the casting liquid is: polysulfone resin: 38%, propionic acid 12%, the balance: N-methyl pyrrolidone; core liquid: deionized water; spinneret hole 1c away from gel water The distance h=80mm from the liquid level of the bath 3; the ambient air humidity is 5%; the ambient air temperature is 15°C; the traction speed of the traction device 5 is 0.2m / s; the water bath time is 40s; the liquid in the gel water bath 3 is distilled water ; The hollow fiber membrane filaments 8 of the formed nascent ecology are washed in the washing tank 7 for 20 days; the liquid in the washing tank 7 is pure water. After experimental testing; the oxygen / nitrogen separation coefficient α of the prepared membrane silk is 7.2.

Embodiment 2

[0010] Example 2: The formulation of the casting liquid and the parameters of the film-making process for preparing the 02 batches of silk.

[0011] The mass percentage of each component of the casting solution is: polysulfone resin: 39%, propionic acid 13%, the balance: N-methylpyrrolidone; core solution: deionized water; spinneret hole 1c distance from gel water The distance h=90mm from the liquid surface of the bath 3; the ambient air humidity is 7.5%; the ambient air temperature is 18°C; the traction speed of the traction device 5 is 0.22m / s; the water bath time is 35s; ; The hollow fiber membrane filaments 8 of the formed nascent ecology are washed in the washing tank 7 for 22 days; the liquid in the washing tank 7 is pure water. After experimental testing; the oxygen / nitrogen separation coefficient α of the prepared membrane silk is 7.2.

Embodiment 3

[0012] Example 3: The formulation of the casting liquid and the parameters of the film-making process for the preparation of batch 03 silk.

[0013] The mass percentage of each component of the casting liquid is: polysulfone resin: 40%, propionic acid 14%, the balance: N-methyl pyrrolidone; core liquid: deionized water; spinneret hole 1c away from gel water The distance h=100mm from the liquid surface of the bath 3; the ambient air humidity is 10%; the ambient air temperature is 20°C; the traction speed of the traction device 5 is 0.26m / s; the water bath time is 30s; the liquid in the gel water bath 3 is distilled water ; The hollow fiber membrane filaments 8 of the formed nascent ecology are washed in the washing tank 7 for 25 days; the liquid in the washing tank 7 is pure water. After experimental testing; the oxygen / nitrogen separation coefficient α of the prepared membrane silk is 7.2.

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Abstract

The invention belongs to gas membrane separation techniques, and relates to a method for preparing a polysulfone fiber membrane. The method is characterized in that a membrane casting liquid comprises the following components in percentage by mass: 38-40% of polysulfone resin, 12-14% of propionic acid and the balance of N-methyl pyrrolidone; the distance h between a spinneret orifice (1c) and a gel water bath (3) is 80-100mm; the ambient air humidity is 5-10%; the ambient air temperature is 15-20 DEG C; the traction velocity is 0.2-0.26m / s; the water bath time is 30-40 seconds; the water washing time is 20-25 days. The invention discloses the method for preparing the polysulfone fiber membrane, and the requirement that an air separation component in a passenger plane oil tank inerting system is made of the polysulfone fiber membrane through spinning can be met.

Description

technical field [0001] The invention belongs to the gas membrane separation technology, and relates to a preparation method of a polysulfone fiber membrane. Background technique [0002] With the rapid development of gas membrane separation technology, on July 29, 2003, Boeing announced a new device with a simple design to eliminate the risk of explosion of aircraft fuel tanks. Its new device applies gas membrane separation technology and uses a hollow fiber membrane; the air separation component in the air inerting system of the A320 aircraft fuel tank produced by Airbus is a cylinder structure, and the cylinder is composed of thousands of small diameters. The composition of hollow fiber permeable membrane. For this reason, the preparation method of hollow fiber membrane is becoming more and more important. The preparation process of the hollow fiber membrane is basically the same, see figure 1 , it is composed of nitrogen bottle, pressure reducer, control cabinet, casti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/08B01D71/68D01D5/24
CPCB01D67/0002B01D69/08B01D71/68D01D5/24
Inventor 蒋东升卜雪琴林贵平孙兵曾宇赵宏韬申晓斌
Owner BEIHANG UNIV
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