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Polymer resin composition for preparing hollow fiber membrane, preparation method of hollow fiber membrane, and hollow fiber membrane

A resin composition, polymer technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as shortening membrane life, and achieve high water permeability, improved strength and chemical resistance.

Inactive Publication Date: 2015-05-27
LOTTE CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, in order to control membrane fouling, membranes are treated physically and chemically, which results in shortened membrane lifetime

Method used

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  • Polymer resin composition for preparing hollow fiber membrane, preparation method of hollow fiber membrane, and hollow fiber membrane
  • Polymer resin composition for preparing hollow fiber membrane, preparation method of hollow fiber membrane, and hollow fiber membrane
  • Polymer resin composition for preparing hollow fiber membrane, preparation method of hollow fiber membrane, and hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Contains 40% by weight of a combined amount of polyvinylidene fluoride resin (PVDF) and cis-endo-bicyclo[2.2.1]heptane 2,3-dicarboxylate disodium, 10% by weight A polymer resin composition of N-methyl-2-pyrrolidone and 50% by weight of γ-butyrolactone was mixed at 170°C for 3 hours to prepare a spinning solution. At this time, the content of disodium cis-endo-bicyclo[2.2.1]heptane 2,3-dicarboxylate in the polymer resin composition was 2,000 ppmw.

[0087] The spinning solution thus prepared together with the internal coagulant is delivered to the nozzle. A mixture of N-methyl-2-pyrrolidone / polyethylene glycol (PEG) in a weight ratio of 1:1 was used as an internal coagulant. The coagulation bath is filled with water, and the height of the water in the coagulation bath and the nozzle are separated by 4 cm. The temperature of the coagulation bath is maintained at 5°C, and water is periodically circulated in it.

[0088] The PVDF hollow fiber separation membrane undergoing ph...

Embodiment 2

[0090] Except that the content of disodium cis-endo-bicyclo[2.2.1]heptane 2,3-dicarboxylate in the polymer resin composition was 3,000 ppmw, the hollow was prepared in the same manner as in Example 1. Fiber membrane.

Embodiment 3

[0094] Contains 40% by weight combined amount of polyvinylidene fluoride (PVDF) resin and peroxide ((2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane)) , 10% by weight of N-methyl-2-pyrrolidone and 50% by weight of γ-butyrolactone polymer resin composition for preparing hollow fiber membranes are mixed at 170° C. for 3 hours Prepare spinning solution. At this time, the content of peroxide in the polymer resin composition is 300 ppmw.

[0095] The prepared spinning solution together with the internal coagulant is delivered to the nozzle. A mixture of N-methyl-2-pyrrolidone / polyethylene glycol (PEG) in a weight ratio of 1:1 was used as an internal coagulant. The coagulation bath is filled with water, and the height of the water in the coagulation bath and the nozzle are separated by 4 cm. The temperature of the coagulation bath is maintained at 5°C, and water is periodically circulated in it.

[0096] The PVDF hollow fiber separation membrane undergoing phase transfer in the coagulat...

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Abstract

The present invention relates to a polymer resin composition for preparing a hollow fiber membrane, including: a vinylidene fluoride-based polymer resin; a good solvent; a poor solvent; and one or more compounds selected from the group consisting of a bicycloalkane having 5 to 15 carbons mono- or poly-substituted with a carboxylic acid metal salt functional group and a peroxide, a preparation method of a hollow fiber membrane using the polymer

Description

Technical field [0001] The present invention relates to a polymer resin composition for preparing hollow fiber membranes, a method for preparing hollow fiber membranes, and hollow fiber membranes, and more particularly to a polymer resin composition having high strength and excellent chemical resistance and achieving high water permeability to make stable In addition, a hollow fiber membrane that enables efficient water treatment, a polymer resin composition capable of providing such a hollow fiber membrane, and a method for preparing the hollow fiber membrane. Background technique [0002] Due to industrial development and population growth, efficient water utilization and treatment technologies have attracted attention. Recently, the application of separation membrane technology has gradually increased in order to ensure the stability of water quality in water treatment, sewage and wastewater treatment, seawater desalination processes, and the like. Among the separation membra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/08B01D67/00
CPCB01D69/08B01D67/0011B01D71/34B01D69/087B01D69/081B01D69/02B01D2325/24B01D2325/30B01D2323/30B01D2323/219B01D2323/2182B01D2323/21821B01D2323/21827
Inventor 李振源朴范镇
Owner LOTTE CHEM CORP
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