Composite nanofiltration membrane prepared based on aliphatic sulfonate condensation product

A technology of aliphatic sulfonate and composite nanofiltration membrane, which is applied in membrane technology, semipermeable membrane separation, chemical instruments and methods, etc., to achieve the effect of cost reduction, low cost and good separation performance

Active Publication Date: 2013-07-31
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has never been any report on the use of aliphatic sulfonate condensates as an anionic polyelectrolyte solution

Method used

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  • Composite nanofiltration membrane prepared based on aliphatic sulfonate condensation product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A composite nanofiltration membrane is prepared through the following steps:

[0023] Step 101: Using the polyacrylonitrile ultrafiltration membrane as the base membrane, immerse it in a polyethyleneimine polyelectrolyte solution with a concentration of 10.0 mg / mL, take it out after immersing for 10 minutes, and wash it thoroughly with deionized water;

[0024] Step 102: Transfer the membrane obtained in step 101 to a 20.0 mg / mL sulfonated cyclohexanone formaldehyde condensate solution, immerse for 10 minutes, take it out, and wash with deionized water.

[0025] Repeat the above steps twice to obtain the composite nanofiltration membrane.

Embodiment 2

[0027] A composite nanofiltration membrane is prepared through the following steps:

[0028] Step 101: Using the cellulose acetate ultrafiltration membrane as the base membrane, immerse it in a polyethyleneimine polyelectrolyte solution with a concentration of 1.0 mg / mL, take it out after immersing for 30 minutes, and wash it thoroughly with deionized water;

[0029] Step 102: Transfer the membrane obtained in step 101 to a 1.0 mg / mL sulfonated cyclohexanone formaldehyde condensate solution, immerse it for 30 minutes, take it out, and wash with deionized water.

[0030] Repeat the above steps 8 times to obtain the composite nanofiltration membrane.

Embodiment 3

[0032] A composite nanofiltration membrane is prepared through the following steps:

[0033] Step 101: Take the polyacrylonitrile ultrafiltration membrane as the base membrane, immerse it in a polyethyleneimine polyelectrolyte solution with a concentration of 5.0 mg / mL, take it out after immersing for 20 minutes, and rinse it fully with deionized water;

[0034] Step 102: Transfer the membrane obtained in Step 101 to a 8.0 mg / mL sulfonated cyclohexanone formaldehyde condensate solution, immerse it for 15 minutes, take it out, and rinse with deionized water.

[0035] Repeat the above steps 5 times to obtain the composite nanofiltration membrane.

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Abstract

The invention relates to a composite nanofiltration membrane, especially relates to a composite nanofiltration membrane employing an aliphatic sulfonate condensation product as an anion polyelectrolyte. The composite nanofiltration membrane comprises a basal membrane layer and a composite membrane layer in order, and the composite membrane layer is formed by static self assembly of the cation polyelectrolyte and the anion polyelectrolyte, wherein, the anion polyelectrolyte is an aliphatic sulfonate condensation product solution. The aliphatic sulfonate condensation product is used as an anion polyelectrolyte, and compared with the present anion polyelectrolyte and aliphatic sulfonate condensation product has a lower cost, thereby reducing the cost of the prepared composite nanofiltration membrane, and improving the separating performance for Ni2+, Ca2+ divalent metal ions and xylenol orange, rhodamine B and other dye molecules in heavy metal ion waste water and dye waste water by the prepared composite nanofiltration membrane.

Description

Technical field [0001] The invention relates to a composite nanofiltration membrane, in particular to a composite nanofiltration membrane prepared by using aliphatic sulfonate condensate as anionic polyelectrolyte. Background technique [0002] Nanofiltration membrane is a new type of membrane separation technology between ultrafiltration and reverse osmosis. The preparation of composite nanofiltration membranes is mostly covered by a very thin selective separation layer on the surface of the base membrane with better strength and greater flux. The preparation methods mainly include coating method and phase inversion method (such as the publication number CN102091539A Patent), interfacial polymerization method (such as publication number CN101254419A, CN101559334A, CN101934201A patent), surface grafting method (such as publication number CN102000511A, CN102068912A, CN1586702A patent), etc., commercial nanofiltration membranes are mostly prepared by interfacial polymerization meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/12B01D67/00
Inventor 郭红霞耿常乐单玲珑谷新月秦振平张国俊崔素萍纪树兰
Owner BEIJING UNIV OF TECH
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