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Hollow fiber gas separation membrane of poly4-methyl-1-pentene and preparation method thereof

A gas separation membrane, hollow technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology and other directions, to achieve the effects of simple preparation process, low manufacturing cost, and environmental protection in the production process

Inactive Publication Date: 2010-01-13
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no patent report on the film-making process of poly-4-methyl-1 pentene prepared by melt-spinning and stretching process

Method used

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  • Hollow fiber gas separation membrane of poly4-methyl-1-pentene and preparation method thereof
  • Hollow fiber gas separation membrane of poly4-methyl-1-pentene and preparation method thereof
  • Hollow fiber gas separation membrane of poly4-methyl-1-pentene and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) raw material melting: poly-4-methyl-1-pentene pellets are melted at 250°C;

[0035] 2) Fiber forming: The melted poly-4-methyl-1-pentene pellets are extruded in a tubular shape through the spinneret of the extruder, and after stretching, thinning, elongation, and solidification, they are made into fiber filaments and extruded The embryo shape size is: outer diameter 20mm, inner diameter 12mm, extrusion speed 7 g / min, winding under the spinneret, winding speed 240 m / min;

[0036] 3) Fiber annealing: place the fiber filaments obtained in step 2) in an oven for annealing, the annealing temperature is 150°C, and the annealing time is 1 hour;

[0037] 4) Stretching to form a film: Stretch the annealed fiber filaments obtained in step 3) to form a hollow fiber membrane with microporous characteristics, first stretch and elongate by 15% at room temperature, and then Tensile elongation is 30%, the total elongation ratio is 50%, and the stretching speed is 4cm / min;

[0038]...

Embodiment 2

[0040] 1) raw material melting: poly-4-methyl-1-pentene pellets are melted at 280°C;

[0041] 2) Fiber forming: The melted poly-4-methyl-1-pentene pellets are extruded in a tubular shape through the spinneret of the extruder, and after stretching, thinning, elongation, and solidification, they are made into fiber filaments and extruded The size of the blank is: outer diameter 30mm, inner diameter 20mm, extrusion speed 20 g / min, winding under the spinneret, winding speed 400 m / min;

[0042] 3) Fiber annealing: place the fiber filaments obtained in step 2) in an oven for annealing, the annealing temperature is 180°C, and the annealing time is 6 hours;

[0043] 4) Stretching to form a film: Stretch the annealed fiber filaments obtained in step 3) to form a hollow fiber membrane with microporous characteristics, first stretch and elongate by 40% at room temperature, and then pull down at a temperature of 120°C The elongation is 80%, the total elongation ratio is 120%, and the str...

Embodiment 3

[0046] 1) raw material melting: poly-4-methyl-1-pentene pellets are melted at 260°C;

[0047]2) Fiber forming: The melted poly-4-methyl-1-pentene pellets are extruded in a tubular shape through the spinneret of the extruder, and after stretching, thinning, elongation, and solidification, they are made into fiber filaments and extruded The embryo size is: outer diameter 30mm, inner diameter 20mm, extrusion speed 13 g / min, winding under the spinneret, winding speed 320 m / min;

[0048] 3) Fiber annealing: the fiber filaments obtained in step 2) are annealed in an oven, the annealing temperature is 150° C., and the annealing time is 2.0 hours;

[0049] 4) Stretching to form a film: Stretching the annealed fiber filaments obtained in step 3) to form a hollow fiber membrane with microporous characteristics, first stretching at room temperature to elongate by 30%, and then pulling it down at 100°C The elongation is 50%, the total elongation ratio is 80%, and the stretching speed is ...

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Abstract

The invention discloses a hollow fiber gas separation membrane of poly4-methyl-1-pentene and a preparation method thereof. The method comprises the following steps: (1) adding poly4-methyl-1-pentene granules to a screw extruder to heat, melt and extrude; (2) forming extruded stock by a spinning jet and stretching the extruded stock at a certain temperature field to obtain nascent fiber yarn; (3) annealing and stretching the nascent fiber yarn on a stretcher so that millipores are formed on an inner layer of the nascent fiber yarn, and the superficial layer of the nascent fiber yarn keeps a compact structure; and (4) forming the nascent fiber yarn at a certain temperature to obtain a finished product of a hollow fiber membrane. Compared with a traditional preparation method, the preparation process of the invention does not use a second phase substance, does not generate pollutants and has simple and convenient manufacture method and high production efficiency. In an aspect of the performance of the gas separation membrane, the membrane has favorable temperature toleration, favorable mechanical strength, good gas permeation selection and great permeation amount and is suitable for separating gases, such as O2, N2, CO2, and the like.

Description

technical field [0001] The invention relates to polymer separation membrane technology, in particular to a poly-4-methyl-1-pentene hollow fiber gas separation membrane and a preparation method thereof. Background technique [0002] Poly-4-methyl-1-pentene is a gas separation membrane material with excellent performance. It has the advantages of good heat resistance, high gas passage selectivity, large permeation volume, and good mechanical strength. It is widely used in chemical industry, environmental protection, and medical treatment. Good application prospects. [0003] The existing preparation method of poly-4-methyl-1-pentene gas separation membrane material is a phase inversion method. Specifically, a non-solvent-induced phase inversion method. In US Patent No. 5,628,942, the method for preparing PMP gas separation membranes by wet and dry / wet phase inversion methods is described in detail. The solvents selected in this patent include cyclohexane, cyclohexene, chlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D71/26
Inventor 胡菊祥陈红征施敏敏倪阳
Owner ZHEJIANG UNIV