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Method for preparing polyphenylsulfone porous hollow fiber membrane

A manufacturing method and technology of polyphenylsulfone, which are applied in the manufacture of hollow filaments, chemical instruments and methods, membranes, etc., can solve the problems of complicated manufacturing process, etc., and achieve the effects of high water permeability and excellent filtration performance.

Inactive Publication Date: 2019-10-15
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the method for producing a polyethersulfone porous hollow fiber membrane described in this document, in order to control the phase separation state of the spinning solution, heating is required, which complicates the production process.

Method used

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  • Method for preparing polyphenylsulfone porous hollow fiber membrane
  • Method for preparing polyphenylsulfone porous hollow fiber membrane
  • Method for preparing polyphenylsulfone porous hollow fiber membrane

Examples

Experimental program
Comparison scheme
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Embodiment

[0026] Next, the present invention will be described using examples.

[0027] Example

[0028] The spinning dope (containing 15 parts by weight of polyphenylsulfone (Solvay Specialty Polymers product D3000), 12 parts by weight of hydrophilic polyvinylpyrrolidone (K30), 2 parts by weight of ethylene glycol, 0.5 parts by weight of water and 70.5 parts by weight of N, N-dimethylformamide), using N,N-dimethylformamide with a concentration of 100% by weight as the core liquid, is sprayed from a double-ring nozzle into an aqueous coagulation bath by a dry-wet spinning method, and then It was washed in pressurized water at 121°C for 1 hour, and then dried in an oven at 60°C to obtain a porous polyphenylsulfone resin porous hollow fiber membrane with an outer diameter of 0.38 mm, an inner diameter of 0.26 mm, and a pore diameter of 0.36 μm. A cross-sectional view of the obtained porous hollow fiber membrane, an appearance view of the outer surface, and an appearance view of the inner...

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Abstract

A spinning dope is used which is composed of a water-soluble organic solvent solution of a polyphenylsulfone, a hydrophilic polyvinyl pyrrolidone, and an ethylene glycol; and when a polyphenylsulfoneporous hollow fiber membrane is prepared by wet spinning or dry-wet spinning, N,N-dimethylformamide in a concentration of 70-100 wt%, preferably 85-100 wt%, and more preferably 100 wt% is used as a core liquid. The resulting porous hollow fiber membrane can be prepared stably without applying a burden on environment, and provides a water purification membrane having a high hydrophilicity and an excellent filtration performance.

Description

technical field [0001] The invention relates to a method for producing a polyphenylsulfone (polyphenylsulfone) porous hollow fiber membrane. More specifically, it relates to a method for producing a polyphenylsulfone porous hollow fiber membrane preferably used as a water purification membrane or the like. Background technique [0002] Filtration operations using porous membranes such as microfiltration membranes and ultrafiltration membranes are used in many fields such as pharmaceuticals, water purification, sterilization in the food industry, and / or ultrapure water production in the semiconductor industry. Make it practical. In recent years, the practical use of membranes made of polysulfones has been flourishing for sterilization in the field of water purification. [0003] Examples of polysulfones include polysulfone, polyethersulfone, polyphenylsulfone, and the like, and polysulfone is often used for household water purification (see Patent Document 1). However, sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/08B01D71/44
CPCB01D69/08B01D71/68B01D2323/12B01D2323/2185B01D2323/2187B01D67/00111B01D71/441B01D67/00165B01D2325/02834B01D69/087C02F1/44D01D5/04D01D5/06D01F1/08B01D2323/219B01D2325/36
Inventor 佐藤孝利渡边健祐
Owner NOK CORP
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