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Polyethersulfone membrane with supporting materials and preparation method thereof

A polyethersulfone membrane and supporting material technology, applied in the field of composite materials, can solve the problems of unfavorable large-scale popularization and application, complicated preparation process and high manufacturing cost, and achieve the reduction of filter equipment volume, cost, and physical tensile strength. high 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

In recent years, some scholars have attempted to modify PES ultrafiltration membrane materials with inorganic nanoparticles and organic substances such as alumina, silica, or titanium dioxide. The composite membrane materials prepared showed excellent performance, but these ultrafiltration The manufacturing cost of the membrane is high and expensive, and the preparation process is complicated, which is not conducive to large-scale application

Method used

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

Examples

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Effect test

preparation example Construction

[0019] The steps of the preparation method of the polyethersulfone membrane with supporting material are as follows:

[0020] 1) Add polyethersulfone with a concentration of 15-20 wt / v %, additives with a concentration of 5-15 wt / v %, and solvent with a concentration of 50-80 wt / v % 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 80-100°C for 8-24 hours;

[0021] 2) Squeeze the casting solution into the tubular hollow fiber spinning spinneret. At the spinning speed of 15-60m / 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 phase separati...

Embodiment 1

[0024] 1) Add polyethersulfone with a concentration of 15 wt / v %, Tween 80 with a concentration of 5 wt / v %, and N-methylpyrrolidone with a concentration of 50 wt / v % 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 80°C for 8 hours;

[0025] 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 temperature is controlled at 18°...

Embodiment 2

[0028] 1) Add polyethersulfone with a concentration of 20 wt / v %, polyethylene glycol (PEG600) with a concentration of 15 wt / v %, and N,N-dimethylformamide with a concentration of 80 wt / v % in sequence In the kettle, open the sealing bar of the stirring shaft of the melting kettle, and fully stir at 100°C for 24 hours to obtain the casting solution;

[0029] 2) Squeeze the casting liquid into the tubular hollow fiber spinning spinneret. At the spinning speed of 60m / min, the casting liquid is squeezed out by air pressure, filtered through the filter and metering pump into the spinneret casting liquid 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 tempera...

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Abstract

The invention discloses a polyethersulfone hollow fibrous membrane with supporting materials and a preparation method thereof. The preparation method of the polytetrafluoroethylene hollow fibrous composite membrane with the supporting materials has the following steps: taking Tween 80 or polyethylene glycol as an additive and N-methylpyrrolidone or N,N-dimethylformamide as a solvent to prepare the polyethersulfone hollow fibrous membrane by a dry-wet method, ensuring monofilaments to enter into a spinneret from other inlets and blending the polyethersulfone hollow fibrous membrane with the monofilaments, wherein the monofilament fibrous materials are polyester, spandex, nylon 6, nylon 66 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 polyethersulfone hollow fiber membrane with a supporting material and a preparation method thereof. Background technique [0002] Ultrafiltration is a liquid phase sieve separation process under the driving force of static pressure difference. Compared with the traditional separation process, ultrafiltration has the following advantages: (1) Separation is carried out at room temperature and low pressure, and the substance does not undergo qualitative changes during the concentration and separation process, which is suitable for the treatment of heat-sensitive substances; (2) It is suitable for precious Recovery of macromolecules and concentration of low-concentration macromolecular substances; (3) Fractional distillation of substances with different molecular weights; (4) No phase change, low energy consumption, about 1 / 2-1 of the energy consumption of evaporation or freezing methods / 5...

Claims

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Application Information

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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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