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Hollow braided pipe modification method and hollow fiber film preparation method

A braided tube and hollow technology, which is applied in the field of polymer hollow fiber membrane preparation, can solve the problems of easy falling off, poor mechanical strength, and poor adhesion, and achieve the effects of improving adhesion, uniform distribution, and enhancing interface bonding strength

Active Publication Date: 2018-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the fact that the hollow fiber membranes in the prior art are broken and broken due to poor mechanical strength and other reasons during the application process of the membrane bioreactor, and the adhesion between the membrane separation layer and the support material existing in the current reinforced hollow fiber membranes Poor, easy to fall off and other shortcomings, the invention provides a method for modifying the hollow braided tube and a method for preparing the hollow fiber layer

Method used

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  • Hollow braided pipe modification method and hollow fiber film preparation method
  • Hollow braided pipe modification method and hollow fiber film preparation method
  • Hollow braided pipe modification method and hollow fiber film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0059] 1) Immerse a polyester fiber hollow braided tube with an inner diameter of 1.0mm and an outer diameter of 1.7mm in a 5wt% sodium hydroxide solution, treat it at 50°C for 30min, and then wash it with deionized water at a speed of 3000 rpm Centrifuge for 5 minutes and dry at 80°C.

[0060] 2) configure a Tris buffer solution with pH 8.5, mix it uniformly with dopamine and polyethyleneimine, and prepare a modified solution whose dopamine concentration is 4.0wt% and polyethyleneimine concentration is 10wt%; The tube was dipped into the modification solution for one coating, treated at 60° C. for 30 minutes, washed with deionized water, and dried by centrifugation.

[0061] 3) Soak the braided tube after the above treatment in 2% CaCl 2 Mineralization was carried out in the solution, and treated at room temperature (25°C) for 8 hours to grow nanoparticles (25.6±3.6nm) on the surface of the braided tube; after washing with deionized water, dry at a temperature of 60°C.

[0...

Embodiment 2

[0071] 1) Immerse a nylon fiber braided tube with an inner diameter of 1.0mm and an outer diameter of 1.7mm in 7.5wt% sodium hydroxide solution, treat it at 45°C for 20min, then wash it with deionized water, and centrifuge at a speed of 5000 rpm 10min, dry at 80°C.

[0072] 2) Configure a Tris buffer solution with a pH of 8.5, uniformly mix it with dopamine and diethylenetriamine to prepare a modified solution with a dopamine concentration of 8.0wt% and a diethylenetriamine concentration of 15wt%; Immerse in the modification solution for one coating, treat at 70° C. for 20 minutes, wash with deionized water, and spin dry by centrifugation.

[0073] 3) Soak the braided tube after the above treatment in 3wt% AgNO 3 Mineralization was carried out in the solution, and treated at room temperature (25°C) for 7 hours to grow nanoparticles (16.4±2.6nm) on the surface of the braided tube; after washing with deionized water, dry at a temperature of 70°C.

[0074] 4) Under the conditio...

Embodiment 3

[0083] 1) Immerse a nylon fiber hollow braided tube with an inner diameter of 1.0mm and an outer diameter of 1.7mm in a 10wt% sodium hydroxide solution, treat it at a temperature of 50°C for 15min, then wash it with deionized water, and centrifuge at a speed of 8000 rpm 10min, dry at 80°C.

[0084] 2) configure the Tris buffer solution with pH 8.5, uniformly mix it with tannic acid and diethylenetriamine to obtain a modified solution whose concentration of tannic acid is 5wt% and diethylenetriamine concentration is 10wt%; The finished braided tube was dipped into the modification solution for one coating, treated at 60° C. for 40 minutes, washed with deionized water, and dried by centrifugation.

[0085]3) Soak the braided tube after the above treatment in 5wt% FeCl 2 Mineralize in the solution, and treat at room temperature (25°C) for 6h to grow nanoparticles (13.8±2.2nm) on the surface of the braided tube; after washing with deionized water, dry at 60°C.

[0086] 4) Under ...

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Abstract

The invention provides a hollow braided pipe modification method, which comprises: modifying a hollow braided pipe by using a modification solution containing a polyphenol compound and a cross-linkedpolymer. The present invention further provides a hollow fiber film preparation method, which comprises: A, modifying the hollow braided pipe as a support material by using the modification method; B,carrying out mineralization treatment on the hollow braided pipe treated in the step A with a salt solution; and C, carrying out surface coating on the hollow braided pipe treated in the step B witha film forming liquid. According to the present invention, the preparation process is simple, the used raw materials are cheap, and the method is suitable for industrial production.

Description

[0001] This application claims to be entitled to the Chinese patent application CN201710006850.6 filed on January 5, 2017 titled "Modification Method of Hollow Braided Tube and Preparation Method of Hollow Fiber Membrane", and submitted on January 5, 2017 titled "One The priority of the Chinese patent application CN201710006968.9, the preparation method of a hollow fiber membrane", the entire content of which is incorporated herein by reference. technical field [0002] The invention belongs to the field of polymer hollow fiber membrane preparation, and in particular relates to a method for modifying a hollow braided tube and a method for preparing a hollow fiber membrane. Background technique [0003] With economic development and population increase, the problem of water scarcity is becoming more and more prominent, so the demand for wastewater reuse is getting higher and higher. Membrane separation technology has been rising since the 1960s. Because of its advantages such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D67/00B01D69/02B01D71/34
CPCB01D67/0093B01D69/08C02F3/1268B01D67/0095B01D2325/24B01D2325/48B01D69/10B01D69/105B01D61/00C02F3/2853B01D2323/12B01D2323/50
Inventor 栾金义任鹏飞奚振宇杨永强张新妙
Owner CHINA PETROLEUM & CHEM CORP
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