Preparation method of hollow fiber pipe in overlay film

A fiber tube and fiber braided tube technology, which is applied in the field of separation membrane preparation and modification, to achieve the effects of improving the performance of anti-backwash and anti-compression, increasing the binding force and expanding the application field.

Active Publication Date: 2012-06-27
SUZHOU CNPT SOURCETECH ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the existing hollow fiber composite membrane itself, the present invention proposes a preparation process for a novel membrane-coated hollow fiber tube

Method used

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  • Preparation method of hollow fiber pipe in overlay film
  • Preparation method of hollow fiber pipe in overlay film
  • Preparation method of hollow fiber pipe in overlay film

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preparation example Construction

[0034] The preparation method of film-coated hollow fiber tube of the present invention, its steps are as follows:

[0035] 1) Preparation of casting solution: Stir and dissolve high molecular polymer, organic solvent, additive, and porogen in different proportions at 40-80°C for 12-36h, and stand at 40-60°C for defoaming for 12-24h to obtain The required different homogeneous casting solutions are set aside;

[0036] 2) Removal of oil stains on PET fiber braided tubes: such as figure 1 As shown, the PET fiber braided tube is immersed in the decontamination tank 1 filled with boiled NaOH (5-15wt%) solution for 10-20min to remove the oily dirt on the braided tube; then wash it with deionized water to remove the braided tube. NaOH remaining on the tube;

[0037] 3) Modification of the PET fiber braided tube: immerse the PET fiber braided tube in the modification tank 2 containing the modification solution for 5-15 minutes, so that the grafting agent in the modification solutio...

Embodiment 1

[0044] Using a dipping and rolling process (such as figure 1 Shown, namely n=0) prepare film-coated hollow fiber tube, its specific steps are as follows:

[0045] 1) Add certain components of polymers, organic solvents, additives, and porogens into the stirring tank to prepare a homogeneous casting solution, as shown in the table below;

[0046] 2) Immerse 24 ingots, 1.2 mm in outer diameter, and 40-mesh density PET fiber braided tube in a boiled 15 wt% NaOH solution for 10 minutes, and wash the remaining NaOH solution on the surface with deionized water;

[0047] 3) After decontamination, the fiber braided pipe is immersed in the modification solution for modification. The immersion time is 15 minutes, and then it is rolled at a rolling pressure of 0.6 MPa and a rolling speed of 5 m / min. Round tube heat setting mold;

[0048] 4) Immerse the modified braided tube in the casting solution for 10 minutes, apply a rolling force of 0.5 MPa to the braided tube with a rolling car a...

Embodiment 2

[0053] Using a dipping and rolling process (such as figure 1 Shown, namely n=0) prepare film-coated hollow fiber tube, its specific steps are as follows:

[0054] 1) Add certain components of polymers, organic solvents, additives, and porogens into the stirring tank to prepare a homogeneous casting solution, as shown in the table below;

[0055] 2) Immerse 24 ingots, 1.2 mm in outer diameter, and 40-mesh density PET fiber braided tube in a boiled 10 wt% NaOH solution for 15 minutes, and wash the residual NaOH solution on the surface with deionized water.

[0056] 3) After decontamination, the fiber braided pipe is immersed in the modifying solution for modification. The immersion time is 10 minutes, and then rolled at a rolling pressure of 0.7 MPa and a rolling speed of 2 m / min. After rolling, pass through a 160 ° C Round tube heat setting mold.

[0057] 4) Immerse the modified braided pipe in the casting solution for 8 minutes, apply a rolling force of 0.8 MPa to the braide...

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Abstract

The invention discloses a preparation method of a hollow fiber pipe in an overlay film, which comprises the following steps 1) preparing a high-molecular polymer, an organic solvent, an additive and a pore forming agent to a plurality of homogeneous casting solutions according to different proportions; 2) removing the PET fiber braiding tube surface spot objects; 3) using a modifier for modifying the PET fiber braiding pipe, fixing a circular pipe at high temperature; 4) using a multi-immersing multi-rolling (several primary immersing-technology in series) technology for cladding various homogeneous casting solutions to the internal and external walls of the PET fiber braiding pipe in order, carrying out a process of circular pipe heat fixing after each time of immersing and rolling, placing the obtained the composite braiding pipe in a gel bath for splitting the phase after the multi-immersing multi-rolling process is finished to obtain the hollow fiber pipe. According to the invention, the PET fiber braiding pipe is taken as a main body, the multi-immersing multi-rolling technology is used, the micro casting solution is coated to the internal and external walls of the braiding pipe, the anti-pollution capability of the braiding pipe can be improved, and a polymer coat layer is formed on the braiding tube surface which can ensure the effective porosity amount and interception effect of the hollow fiber tube.

Description

technical field [0001] The invention belongs to the technical field of separation membrane preparation and modification, and in particular relates to a preparation method of a novel membrane-coated hollow fiber tube. Background technique [0002] The membrane has a selective separation function. The process of using the selective separation of the membrane to achieve the separation, purification, and concentration of different components of the feed liquid is called membrane separation. At present, membrane separation technology is widely used in chemistry, medicine, metallurgy, energy, light industry, textiles, etc. , food, aerospace, shipping, sewage treatment and other fields have been widely used. [0003] In the development of membrane technology, the development and preparation of separation membrane materials is an extremely important task. Many scientific researchers have done a lot of research on the preparation, structure, modification and performance of polymer m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D67/00B01D69/04
Inventor 柴续斌王磊余铭皋容志勇周刚苗瑞黄游黄丹曦李贵军黄臣勇王旭东吕永涛孙兵赵解杨
Owner SUZHOU CNPT SOURCETECH ENVIRONMENTAL TECH
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