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Polysulfone membrane with supporting materials and preparation method thereof

A support material and polysulfone membrane technology, applied in the field of composite materials, can solve the problems of high manufacturing cost, high price, and unfavorable large-scale application of ultrafiltration membranes, and achieve high physical tensile strength and increased service life Effect

Inactive Publication Date: 2012-02-08
ZHEJIANG CREATION ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacturing cost of these ultrafiltration membranes is high and expensive, and the preparation process is complicated, which is not conducive to large-scale application.

Method used

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  • Polysulfone membrane with supporting materials and preparation method thereof
  • Polysulfone membrane with supporting materials and preparation method thereof
  • Polysulfone membrane with supporting materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The steps of the preparation method of the polysulfone membrane with supporting material are as follows:

[0018] 1) Add polyethersulfone with a concentration of 16-18 wt / v%, additives with a concentration of 5-15 wt / v%, and solvents with a concentration of 50-80 wt / v% into the melting pot in sequence, and turn on the The stirring shaft is sealed with the pressure bar, and the casting solution is obtained after fully stirring at 60-100°C for 8-24 hours;

[0019] 2) Squeeze the casting solution into the tubular hollow fiber spinning spinneret. At the spinning speed of 15-40m / min, the casting solution is extruded by air pressure, filtered through the filter and metering pump into the spinneret for casting. The membrane liquid enters the hole, and the monofilament fiber entering the spinneret from the monofilament fiber entrance hole and the deionized water with the core liquid entering the hole enter the coagulation bath after composite molding of the spinneret, and then ...

Embodiment 1

[0022] 1) Add polyethersulfone with a concentration of 16 wt / v %, Tween 20 with a concentration of 5 wt / v %, and N,N-dimethylacetamide with a concentration of 50 wt / v % into the melting pot in turn, and turn on The stirring shaft of the melting pot is sealed and pressed, and the casting solution is obtained after fully stirring for 8 hours at 60°C;

[0023] 2) Squeeze the casting solution into the tubular hollow fiber spinning spinneret. At a spinning speed of 15m / min, the casting solution is extruded by air pressure, filtered through the filter and metering pump into the spinneret casting solution Entering the hole, the monofilament fiber entering the spinneret from the monofilament fiber entering hole and the deionized water entering the hole with the core liquid enter the coagulation bath after composite molding of the spinneret, and phase separation solidifies to form a film, and the coagulation bath The gel medium is water at a constant temperature, and the water temperat...

Embodiment 2

[0026] 1) Add polyethersulfone with a concentration of 18 wt / v %, polyethylene glycol with a concentration of 15 wt / v %, and N-methylpyrrolidone with a concentration of 80 wt / v % into the dissolving kettle in sequence, and turn on the dissolving kettle The agitator shaft is sealed with a pressure column, and the casting solution is obtained after fully stirring for 24 hours at 100°C;

[0027] 2) Squeeze the casting solution into the tubular hollow fiber spinning spinneret. At the spinning speed of 40m / min, the casting solution is extruded by air pressure, filtered through the filter and metering pump into the spinneret casting solution Entering the hole, the monofilament fiber entering the spinneret from the monofilament fiber entering hole and the deionized water entering the hole with the core liquid enter the coagulation bath after composite molding of the spinneret, and phase separation solidifies to form a film, and the coagulation bath The gel medium is water at a consta...

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Abstract

The invention discloses a polysulfone hollow fibrous membrane with supporting materials and a preparation method thereof. The polysulfone hollow fibrous composite membrane with the supporting materials is prepared a method comprising the following steps: preparing the polysulfone hollow fibrous membrane by a dry-wet method by taking Tween 20 or polyethylene glycol as an additive and N,N-dimethylacetamide or N-methylpyrrolidone as a solvent, ensuring monofilaments to enter into a spinneret from other inlets and blending the polysulfone hollow fibrous membrane with the monofilaments, wherein the monofilament fibrous materials are spandex, nylon 6 or polyurethane and have diameter of 0.01-2mm. According to the invention, the defect that the hollow fibrous membranes without supports have insufficient physical tensile strength and are easy to suffer from filament break is overcome; the physical tensile strength of the membrane disclosed by the invention is improved by more than several times compared with that of the hollow fibrous membranes without supports; support and membrane stripping can be avoided; the water flux and manufacturing cost of the membrane disclosed by the invention are equivalent to those of the hollow fibers without supports; and the membrane has technical and economic breakthroughs, can replace the existing hollow fiber products and has great economic and social benefits.

Description

technical field [0001] The invention relates to a composite material, in particular to a polysulfone hollow fiber membrane with a supporting material and a preparation method thereof. Background technique [0002] Ultrafiltration is a screening process in which pressure is used as the driving force, and solvents and small molecular solutes are permeated through the membrane by using the pore size of the membrane and the chemical properties of the material surface, while colloids, proteins, bacteria, viruses and other macromolecular substances are trapped and concentrated. Commonly used ultrafiltration membrane materials include polysulfone, polyethersulfone, polyvinylidene fluoride, polyacrylonitrile, etc. In order to overcome some shortcomings of the membrane material itself, such as: poor hydrophilicity, easy pollution, poor strength, etc., people often use Some physical or chemical methods modify it. In recent years, some scholars have tried to use Al 2 o 3 , SiO 2 、T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D69/08B01D71/68
Inventor 包进峰张星星李芸芳赵辉杨佳
Owner ZHEJIANG CREATION ENVIRONMENT TECH
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