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Preparation method of strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration dry membrane

A polyethersulfone, strong acid-resistant technology, applied in the field of preparation of tubular ultrafiltration dry membrane, can solve the problem of damaging the normal curing and sealing of the adhesive at the end of the membrane module, unfavorable processing, manufacturing and transportation of the module, and affecting the permeability of the membrane. and mechanical strength, etc., to reduce the cost and risk of storage and transportation, prolong the storage time of the membrane, and overcome the effects of easy pollution and blockage.

Active Publication Date: 2013-03-13
JIANGSU KAIMI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the currently commercialized tubular ultrafiltration membranes are made by the non-solvent phase inversion method, so their pores are filled with coagulation liquid and are in a wet state.
If the tubular ultrafiltration membrane is naturally dehydrated and dried, the membrane pores will collapse, which will seriously affect the permeability and mechanical strength of the membrane; if it is stored in a wet state, it is often necessary to add protective solutions such as glycerin and fungicides for long-term storage. Bactericides are very prone to failure, which not only easily leads to biofouling of the membrane, but also the moisture in the wet membrane will destroy the normal curing and sealing of the adhesive at the end of the membrane module, which is not conducive to the processing, manufacturing and transportation of the module

Method used

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  • Preparation method of strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration dry membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Immerse the strong acid and strong alkali resistant polyethersulfone tubular ultrafiltration wet membrane in purified water at a temperature of 35°C for 20 minutes, and then directly immerse it in a temperature of 25°C, composed of 0.2% by mass polyoxyethylene alkylbenzene sulfonate ammonium salt, 30% glycerin, 0.5% formaldehyde and 69.3% purified water in the film dry state treatment solution, soaked continuously for 4 days, then took it out and dried it naturally for 12 hours at the temperature of 25°C and the relative humidity of 88%, that is, it was used for Strong acid and strong base polyethersulfone tubular ultrafiltration dry membrane.

Embodiment 2

[0026] Soak the strong acid and strong alkali resistant polyethersulfone tubular ultrafiltration wet membrane in deionized water at a temperature of 50°C for 30 minutes, and then directly immerse it in a temperature of 30°C with a mass percentage of 0.5% alkylbenzene polyoxyethylene ether, 45% Glycerin, 0.2% isothiazolinone and 54.3% deionized water were used to dry the film, soaked continuously for 5 days, then took it out and dried it naturally for 12 hours in an environment with a temperature of 25 ° C and a relative humidity of 88%. It is suitable for strong acid and alkali resistant polyethersulfone tubular ultrafiltration dry membrane.

Embodiment 3

[0028] Soak the strong acid and strong alkali resistant polyethersulfone tubular ultrafiltration wet membrane in distilled water at a temperature of 65°C for 25 minutes, then directly immerse it in a temperature of 30°C, composed of 0.35% sodium lauryl sulfate, 50% glycerin, 1.0% sodium bisulfite and 48.65% distilled water in the film dry state treatment solution, soaked continuously for 3 days, then took it out and dried it for 2 hours in an environment with a temperature of 80°C and a relative humidity of 20%. Polyethersulfone tubular ultrafiltration dry membrane.

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Abstract

The invention relates to a preparation method of a strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration dry membrane, which comprises the steps of: carrying out heat treatment on the existing strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration wet membrane; then soaking the treated wet membrane into membrane drying treatment fluid; and finally drying the polyether sulfone tubular ultrafiltration wet membrane to obtain the tubular ultrafiltration dry membrane which is stable in membrane properties, resists strong acid and strong base, and is high in mechanical strength and good in water permeability. The tubular ultrafiltration dry membrane is simple and feasible in preparation method and can be continuously produced; and the produced membrane product can be stored in a dry state, and is convenient for pouring of a membrane component and convenient to store and transport.

Description

technical field [0001] The invention relates to a preparation method of a tubular ultrafiltration dry film, in particular to a preparation method for a strong acid and strong alkali resistant polyethersulfone tubular ultrafiltration dry film. Background technique [0002] Polyethersulfone (PES) is a polymer membrane material with excellent comprehensive properties. Its glass transition temperature is as high as 225 ° C. It has excellent heat resistance, acid and alkali resistance, pressure resistance, corrosion resistance and excellent biocompatibility. And mechanical properties, etc., have been widely studied and applied in the preparation of organic tubular ultrafiltration membranes. Chinese patent 201110404082.2 discloses a strong acid and strong alkali resistant organic tubular membrane and its preparation method and the casting solution used. The base material, porogen, additive and solvent are mixed and stirred to obtain the casting solution, and then the vacuum defoam...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08L81/06
Inventor 关晓琳尹燕亓云金明王怀林
Owner JIANGSU KAIMI MEMBRANE TECH
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