A high-strength separation membrane with reinforcing material and its preparation method

A technology for reinforcing materials and separation membranes, which is used in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., and can solve the problem of weak bonding between separation membranes and support tubes, separation of separation membranes and support tubes, and restriction of the service life of separation membranes, etc. problems, to achieve the effect of convenient industrial amplification, wide adjustment range and convenient operation

Active Publication Date: 2018-05-08
广西自贸区桂港信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this method, the longitudinal tensile strength of the microporous membrane can be greatly improved. However, due to the weak connection between the separation membrane and the support tube, peeling between the separation membrane and the support tube will occur during backwashing or aeration. On the other hand, it seriously restricts the service life of the separation membrane

Method used

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  • A high-strength separation membrane with reinforcing material and its preparation method
  • A high-strength separation membrane with reinforcing material and its preparation method
  • A high-strength separation membrane with reinforcing material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A preparation method of a high-strength separation membrane with a reinforcing material, the preparation method comprising the steps of:

[0043] ① Add 20g of polyvinylidene fluoride and 8g of PEG-600 to 72g of DMAc, mechanically stir at 80°C for 12h, filter, stand still for 6h, and defoam to obtain the film-making solution;

[0044] ② Blend 15g of toluene diisocyanate with 1g of calcium oxide, stir at room temperature for 12 hours, filter and stand for 6 hours, and defoam to obtain a reinforcing material;

[0045] ③ will be as figure 2 The three-channel nozzle shown is heated to 80°C, and the deionized water flows out from the deionized water outlet of the three-channel nozzle through independent channels. The film-making solution is extruded at the same time, falls vertically into the gel in deionized water, is drawn after being wound by a winding wheel, and soaked in deionized water to obtain a high-strength separation membrane with reinforcing materials.

Embodiment 2

[0047] A preparation method of a high-strength separation membrane with a reinforcing material, the preparation method comprising the steps of:

[0048] ① Add 18g of polyethersulfone and 8g of PEG-200 to 74g of DMAc, mechanically stir at 80°C for 12h, filter, stand still for 6h, and defoam to obtain a membrane-forming solution;

[0049] ② Blend 19g of toluene diisocyanate with 1g of calcium oxide, stir at room temperature for 12h, filter, stand for 6h, and defoam to obtain a reinforcing material solution;

[0050] ③ will be as figure 2 The three-channel nozzle shown is heated to 80°C, and the deionized water flows out from the deionized water outlet of the three-channel nozzle through independent channels. The film-making solution is extruded at the same time, falls vertically into the gel in deionized water, is drawn after being wound by a winding wheel, and soaked in deionized water to obtain a high-strength separation membrane with reinforcing materials.

Embodiment 3

[0052] A preparation method of a high-strength separation membrane with a reinforcing material, the preparation method comprising the steps of:

[0053]①Add 20g of polysulfone and 8g of PEG-200 into 72g of DMF, mechanically stir at 80°C for 12h, filter, stand still for 6h, and defoam to obtain the membrane-making solution;

[0054] ② Blend 19g of toluene diisocyanate with 1g of calcium oxide, stir at room temperature for 12h, filter, stand for 6h, and defoam to obtain a reinforcing material solution;

[0055] ③ will be as figure 2 The three-channel nozzle shown is heated to 80°C, and the deionized water flows out from the deionized water outlet of the three-channel nozzle through independent channels. The film-making solution is extruded at the same time, falls vertically into the gel in deionized water, is drawn after being wound by a winding wheel, and soaked in deionized water to obtain a high-strength separation membrane with reinforcing materials.

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Abstract

The invention relates to a high-strength separating membrane with a reinforcing material and a preparation method of the high-strength separating membrane and belongs to the technical field of separating membrane preparation. The preparation method includes the steps that a polymer, an additive and a solvent are mixed to be uniform according to preset mass percentages to obtain a membrane preparing solution, isocyanate and a gas absorber are mixed to be uniform to obtain the reinforcing material, the membrane preparing solution and the reinforcing material are extruded through a co-extrusion method, and then the reinforcing material is covered with the membrane preparing solution. The high-strength separating membrane and the preparation method have the advantages that the separating membrane is prepared through the co-extrusion method, and a supporting layer material and the membrane preparing solution in the separation layer can be independently prepared and do not affect each other; the adjusting range of the composition of the membrane preparing solution is wide, the reinforcing additive can be added to the membrane preparing solution in the supporting layer on the inner layer, the separation performance of the separating membrane is not affected, and meanwhile the high-strength and high-flux separating membrane is obtained.

Description

technical field [0001] The invention relates to a high-strength separation membrane with a reinforcing material and a preparation method thereof, belonging to the technical field of separation membrane preparation. Background technique [0002] Compared with traditional separation technology, membrane separation technology has the advantages of high separation efficiency, energy saving and environmental protection, and is a high-tech solution to the current energy crisis and environmental pollution. In the application of membrane separation technology, microporous membrane is the earliest industrialization, the most widely used, and also the membrane type with the largest consumption. Due to the advantages of simple, fast, high-efficiency and energy-saving, microporous membrane filtration technology has attracted much attention and adoption, and has been widely used in the fields of food and beverage, medicine, chemical industry, electronics, energy and environmental protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D71/68B01D69/10B01D67/00
CPCB01D67/0006B01D69/10B01D71/024B01D71/06B01D71/34B01D71/68B01D2323/30B01D2325/24
Inventor 陈一溪林涛付明伟
Owner 广西自贸区桂港信息科技有限公司
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