Modification method for ultrafiltration membranes, modified ultrafiltration membrane and method adopting ultrafiltration membrane for filtration

An ultrafiltration membrane, modification technology, applied to modified polymer ultrafiltration membrane, a modified polymer ultrafiltration membrane, modification method, filtration field, can solve the problem of hydrophilic polymerization The problem of limited material, affecting the formation of membrane pore structure, etc., achieves the effect of simple reaction steps, high blocking efficiency, and controllable connection amount

Active Publication Date: 2015-02-18
福建医工设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former affects the formation of the membrane pore structure due to the introduction of a large number of mixtures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] This embodiment provides a method for modifying an ultrafiltration membrane. The method comprises the steps of:

[0027] Step S01, performing carboxylation treatment on the polymer ultrafiltration membrane made of polyacrylonitrile; the carboxylation treatment specifically includes: soaking the polymer ultrafiltration membrane in 1.5 mol / L sodium hydroxide solution at 40°C Soak for 50 minutes.

[0028] This step is a substantive step for carboxylation of the polymer ultrafiltration membrane.

[0029] Step S02, taking out the polymer ultrafiltration membrane after soaking treatment, soaking or washing with distilled water, then soaking with 0.1mol / L hydrochloric acid solution for 45 minutes, and then soaking and washing with distilled water for 3 times, each time for 10 minutes.

[0030] The purpose of the treatment with dilute hydrochloric acid solution is to replace the sodium ions attached to the carboxyl groups of the polymer ultrafiltration membrane with hydrogen ...

no. 2 example

[0047] This embodiment provides a method for modifying an ultrafiltration membrane. The method comprises the steps of:

[0048] Step S01, performing carboxylation treatment on the polymer ultrafiltration membrane made of polyacrylonitrile; the carboxylation treatment specifically includes: soaking the polymer ultrafiltration membrane in 1mol / L sodium hydroxide solution, soaking at 35°C Process for 40 minutes.

[0049] This step is a substantive step for carboxylation of the polymer ultrafiltration membrane.

[0050] Step S02, taking out the soaked polymer ultrafiltration membrane, soaking or washing with distilled water, then soaking with 0.05 mol / L hydrochloric acid solution for 30 minutes, and then soaking and washing with distilled water for 3 times, each time for 10 minutes.

[0051] The purpose of the treatment with dilute hydrochloric acid solution is to replace the sodium ions attached to the carboxyl groups of the polymer ultrafiltration membrane with hydrogen ions. ...

no. 3 example

[0068] This embodiment provides a method for modifying an ultrafiltration membrane. The method comprises the steps of:

[0069] Step S01, performing carboxylation treatment on the polymer ultrafiltration membrane made of polyacrylonitrile; the carboxylation treatment specifically includes: soaking the polymer ultrafiltration membrane in 2mol / L sodium hydroxide solution, soaking at 45°C Process for 60 minutes.

[0070] This step is a substantive step for carboxylation of the polymer ultrafiltration membrane.

[0071] Step S02, taking out the soaked polymer ultrafiltration membrane, soaking or washing with distilled water, then soaking with 0.15 mol / L hydrochloric acid solution for 60 minutes, and then soaking and washing with distilled water for 3 times, each time for 10 minutes.

[0072] The purpose of the treatment with dilute hydrochloric acid solution is to replace the sodium ions attached to the carboxyl groups of the polymer ultrafiltration membrane with hydrogen ions. ...

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Abstract

The invention provides a modification method for ultrafiltration membranes. The method includes the following steps: performing a first modification treatment to a macromolecular ultrafiltration membrane, wherein the first modification treatment includes amination treatment or carboxylation treatment; performing a second modification treatment to the macromolecular ultrafiltration membrane subjected to the first modification treatment to obtain a modified ultrafiltration membrane, wherein the second modification treatment is amidation between the macromolecular ultrafiltration membrane subjected to the first modification treatment and oligodeoxynucleotide adopting a hairpin structure, when the first modification treatment is amination, the oligodeoxynucleotide contains the carboxyl, and when the first modification treatment is carboxylation, the oligodeoxynucleotide contains the amido. According to the technical scheme, the reaction procedures are simple, the hairpin oligodeoxynucleotide can be synthesized according to man-made designs, the connection size is controllable, the protein blockage preventing efficiency of the connected macromolecular ultrafiltration membrane is high, the adsorbability to protein can be controlled through regulating and controlling the pH value of the medium to be filtered, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to a modification method of a polymer ultrafiltration membrane, a modified polymer ultrafiltration membrane, and a modified polymer ultrafiltration membrane applied to filtration Methods. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane with consistent pore size and rated pore size range of 0.001-0.02 microns. By applying appropriate pressure on one side of the membrane, solute molecules smaller than the pore size can be screened out to separate particles with a molecular weight greater than 500 Daltons (atomic mass units) and a particle size greater than 10 nanometers. [0003] At present, polymer materials such as polyacrylonitrile are widely used in the preparation of ultrafiltration membranes due to their excellent properties such as good chemical stability and heat resistance. Membranes prepared with these polymer materials can be...

Claims

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Application Information

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IPC IPC(8): B01D71/42B01D67/00C07K1/34
Inventor 何盛斌林哲许小平
Owner 福建医工设计院有限公司
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