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Hollow fiber ultrafiltration membrane of water purifier and preparation method for hollow fiber ultrafiltration membrane

An ultrafiltration membrane and water purifier technology, applied in the field of water purifier hollow fiber ultrafiltration membrane and its preparation, can solve the problems of low flux, poor hydrophilicity, poor toughness, etc. The effect of good performance and high toughness

Inactive Publication Date: 2015-09-23
WUHU SUNRISE NEW BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the deficiencies in the prior art above, the present invention proposes a hollow fiber ultrafiltration membrane for water purifiers and a preparation method thereof, which solves the problem that the ultrafiltration membrane made of polyvinyl chloride has poor hydrophilicity and low flux. For the problem of poor toughness, the ultrafiltration membrane is made of polyvinyl chloride and polyethersulfone resin in a certain ratio, and the performance of the ultrafiltration membrane is better than that of the two alone.

Method used

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  • Hollow fiber ultrafiltration membrane of water purifier and preparation method for hollow fiber ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A water purifier hollow fiber ultrafiltration membrane is composed of the following components in mass percentage:

[0026] Polyethersulfone resin 20%

[0027] PVC 10%

[0028] Polar solvent 55%

[0029] Polar small molecule porogen 8%

[0030] Hydrophilic agent 7%

[0031] The specific method includes the following steps:

[0032] Step 1: Weigh each component according to the above formula, put each component into the spinning kettle, stir and dissolve at 95°C for 10 hours, and make a spinning casting solution that is evenly mixed, vacuum static defoaming and keep At the required spinning temperature of 95°C;

[0033] Step 2: The casting solution is spun into a vacuum fiber membrane through a spinning machine, and then immersed in a coagulation bath of deionized water at 60°C to obtain a hollow fiber ultrafiltration membrane; the hollow fiber ultrafiltration membrane is spun and stretched; the coagulation bath includes External coagulation liquid and internal coa...

Embodiment 2

[0036] A water purifier hollow fiber ultrafiltration membrane is composed of the following components in mass percentage:

[0037] Polyethersulfone resin 16%

[0038] PVC 8%

[0039] Polar solvents 54%

[0040] Polar small molecule porogen 12%

[0041] Hydrophilic agent 10%

[0042] Concrete preparation method comprises the following steps:

[0043] Step 1: Weigh each component according to the above formula, put each component into the spinning kettle, stir and dissolve at 80°C for 8 hours to make a uniformly mixed spinning casting solution, vacuum static defoaming and keep At the required spinning temperature of 80°C;

[0044] Step 2: The casting solution is spun into a vacuum fiber membrane through a spinning machine, and then immersed in a 50°C deionized water coagulation bath to obtain a hollow fiber ultrafiltration membrane; the hollow fiber ultrafiltration membrane is spun and stretched; the coagulation bath includes External coagulation liquid and internal coagul...

Embodiment 3

[0047] A water purifier hollow fiber ultrafiltration membrane is composed of the following components in mass percentage:

[0048] Polyethersulfone resin 10%

[0049] PVC 10%

[0050] Polar solvents 65%

[0051] Polar small molecule porogen 10%

[0052] Hydrophilic agent 5%

[0053] Concrete preparation method comprises the following steps:

[0054] Step 1: Weigh each component according to the above formula, put each component into the spinning kettle, stir and dissolve at 75°C for 9 hours to make a uniformly mixed spinning casting solution, vacuum static defoaming and keep At the required spinning temperature of 90°C;

[0055] Step 2: The casting solution is spun into a vacuum fiber membrane through a spinning machine, and then immersed in a 50°C deionized water coagulation bath to obtain a hollow fiber ultrafiltration membrane; the hollow fiber ultrafiltration membrane is spun and stretched; the coagulation bath includes An external coagulation liquid and an internal ...

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Abstract

The invention discloses a hollow fiber ultrafiltration membrane of a water purifier. The hollow fiber ultrafiltration membrane consists of the following components in percentage by mass: 10-20% of polyethersulfone resin, 5-10% of polyvinyl chloride, 30-55% of a polar solvent, 8-15% of a polar small-molecule pore-forming agent and 6-10% of a hydrophilc agent. According to the invention, the hollow fiber ultrafiltration membrane, which is prepared by mixing polyvinyl chloride with polyethersulfone resin in certain proportion, is relatively good in hydrophilcity, greatly increased in flux and relatively high in toughness relative to individual use of the polyvinyl chloride and the polyethersulfone resin. The polyvinyl chloride and the polyethersulfone resin have synergistic effect, so that the obtained hollow fiber ultrafiltration membrane has more excellent performance.

Description

technical field [0001] The invention belongs to the technical field of filtering polymer materials in water purifiers, and in particular relates to a hollow fiber ultrafiltration membrane for water purifiers and a preparation method thereof. Background technique [0002] Membrane is a material with selective separation function. The process of using membrane selective separation to realize the separation, purification and concentration of different components of feed liquid is called membrane separation technology. As a new separation technology, membrane separation technology has been widely used in gas separation, material separation and water treatment. Among them, the demand for membrane products in the field of water treatment is the largest. It is different from traditional filtration in that membranes can be separated in the molecular range, and this The process is a physical process without phase changes and additives. Membrane separation technology has developed r...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/30B01D69/08B01D67/00
Inventor 吴昌飞艾蒙雁
Owner WUHU SUNRISE NEW BUILDING MATERIALS TECH
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