Separation membrane, and method for producing same

一种制造方法、分离膜的技术，应用在半透膜分离、化学仪器和方法、膜等方向，能够解决未暗示等问题，达到化学和物理强度优异、高病毒除去性能的效果

Active Publication Date: 2011-08-17
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various parameters and mechanisms for improving virus removal are neither described nor suggested in this document

Method used

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  • Separation membrane, and method for producing same
  • Separation membrane, and method for producing same
  • Separation membrane, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125]38% by weight of vinylidene fluoride homopolymer having a weight average molecular weight of 417,000 and 62% by weight of γ-butyrolactone were dissolved at 160°C. This polymer solution is discharged from the outer tube of double tube type die head, simultaneously γ-butyrolactone 85% by weight aqueous solution is discharged from the inner side tube of double tube type die head, makes them in by containing 85% by weight gamma-butyrolactone It is solidified in a bath composed of an aqueous ester solution at a temperature of 10°C. The resulting film was stretched to 1.5 times in water at 90°C. The obtained membrane was a hollow fiber membrane having a spherical structure, and this membrane was used as a support.

[0126] Next, polyvinylidene fluoride homopolymer (manufactured by Alkema Corporation, Kynar (registered trademark) HSV900) with a melt viscosity of 6400 Pa·s was mixed with 9.6% by weight of polyvinyl difluoride with a melt viscosity of 3200 Pa·s. Vinyl fluoride ...

Embodiment 2

[0128] Polyvinylidene fluoride homopolymer (manufactured by Alkema Corporation, Kynar (registered trademark) HSV900) with a melt viscosity of 6400 Pa·s was dissolved in N-methyl-2-pyrrolidone at 12% by weight to obtain separation Membrane stock solution for functional layer. This membrane-making stock solution was uniformly coated on the surface of the hollow fiber membrane obtained in Example 1, and then solidified in water at 23°C, thereby producing a separator with a three-dimensional network structure formed on a support layer with a spherical structure. A hollow filament separation membrane with a functional layer. Table 1 shows the membrane structure and membrane performance of the obtained separation membrane.

Embodiment 3

[0130] Polyvinylidene fluoride homopolymer (manufactured by Alkema Corporation, Kynar (registered trademark) HSV900) with a melt viscosity of 6400 Pa·s was mixed with maleic anhydride-modified polyvinylidene fluoride in an amount of 9.6% by weight. "Alkema Corporation, Kynar (registered trademark) ADX-111" was dissolved in N-methyl-2-pyrrolidone at 2.4% by weight to obtain a membrane-forming stock solution for separating functional layers. This membrane-making stock solution was uniformly coated on the surface of the hollow fiber membrane obtained in Example 1, and then solidified in water at 23°C to produce a separation function in which a three-dimensional network structure was formed on a support layer with a spherical structure. Layered hollow filament separation membrane. Table 1 shows the membrane structure and membrane performance of the obtained separation membrane.

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PUM

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Abstract

Disclosed is a separation membrane comprising a layer having a separation function, wherein the layer having a separation function comprises a poly(vinylidene fluoride) resin having a melt viscosity of 3300 Pas or more and has a three-dimensional network structure. The separation membrane can be used for the treatment of water and has high virus-removal properties, high pure water permeability, high physical durability and high chemical strength.

Description

technical field [0001] The present invention relates to a separation membrane suitable for use in the field of water treatment, the field of pharmaceutical production, the field of the food industry, the field of membranes for blood purification, and a method for producing the same. In particular, the present invention relates to a separation membrane suitable for removing microscopic substances such as viruses in a liquid and a method for producing the same. Background technique [0002] In recent years, separation membranes have been used in various fields such as water treatment fields and food industry fields. In the field of water treatment such as drinking water production, water purification treatment, and wastewater treatment, separation membranes have replaced the previous sand filtration process or coagulation sedimentation process to remove impurities in water. In order to prevent biofouling of the membrane, bactericides such as sodium hypochlorite are added to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/12
CPCB01D67/0009B01D71/34C02F1/444B01D2323/06B01D69/1213B01D69/1212B01D69/088B01D69/085B01D67/0016B01D69/10B01D71/441B01D71/401B01D71/14B01D2323/12B01D2325/02833B01D2325/02834B01D2325/0283B01D2325/36
Inventor 小森研司石崎利之岩井健太付珣瑶峰岸进一皆木尚
Owner TORAY IND INC
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