Preparation method of arginine modified composite nanofiltration membrane

A composite nanofiltration membrane, arginine technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of poor pollution resistance, low flux of composite membrane, poor hydrophilicity of polyamide layer, etc. Achieve the effect of improving membrane fouling, wide application and improving hydrophilicity

Pending Publication Date: 2021-12-07
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional polypiperazine amide composite nanofiltration membrane has an uneven spine structure due to the rapid reaction of piperazin

Method used

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  • Preparation method of arginine modified composite nanofiltration membrane
  • Preparation method of arginine modified composite nanofiltration membrane
  • Preparation method of arginine modified composite nanofiltration membrane

Examples

Experimental program
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Example Embodiment

[0022] Example 1-12

[0023] The ultrafiltration membrane is fully washed with a solution containing 2W% aliphatic amine monomer (mexicine and piperazine) and aqueous solution of 3% triethylamine, then removes the surface residual moisture; The ultrafiltration membrane is immersed in the n-hexane solution containing 0.15 W / V% aphraformyl chloride monomer; then the ultrafiltration membrane is placed in an oven at 60 ° C for 1 min, then taken out to obtain L-arginine Polyamide modified composite nanofiltration membrane, and finally soaked in a 25 ° C in an environment for 48 h to give an L-arginine composite northern filter film. Composite nanofiltration membrane under 0.6 MPa, with 1000 ppm NA 2 SO 4 The aqueous solution is performed, and the water flux and salt tie were shown in Table 1.

[0024] Table 1 Example 1-12 of the formulation and film of the film and the exquisite

[0025]

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Abstract

The invention discloses a preparation method of an arginine-containing modified composite nanofiltration membrane with excellent permeability, which comprises the steps of (1) fully cleaning an ultrafiltration membrane, dipping the ultrafiltration membrane in an aqueous solution containing an aliphatic amine monomer for 1-10 minutes, and then removing residual water on the surface; (2) soaking the ultrafiltration membrane treated in the step (1) in an organic phase solution containing 0.1 w/v%-1w/v% of a trimesoyl chloride monomer, and reacting for 0.5-5 minutes; and (3) putting the ultrafiltration membrane treated in the step (2) into a drying oven at the temperature of 30-70 DEG C for 1-10 minutes, then taking out the ultrafiltration membrane to obtain the polyamide modified composite nanofiltration membrane containing L-arginine, and finally soaking the polyamide modified composite nanofiltration membrane in an environment at the temperature of 20-40 DEG C for 12-48 hours to remove unreacted monomers and other impurities.

Description

technical field [0001] The invention relates to the field of nanofiltration membrane preparation, in particular to a preparation method of an arginine-containing modified composite nanofiltration membrane with excellent permeability. Background technique [0002] Nanofiltration membrane is a new type of separation membrane developed after the typical reverse osmosis composite membrane in the early 1980s. Its pore size range is between reverse osmosis membrane and ultrafiltration membrane, about 1nm, so it is called nanofiltration. membrane. It has two notable features: first, the molecular weight cut-off is between reverse osmosis membrane and ultrafiltration membrane, about 200Da to 1000Da; second, the separation layer on the surface of nanofiltration membrane is composed of polyelectrolyte. From the perspective of membrane structure, most nanofiltration membranes are composite membranes, that is, the chemical composition of the surface separation layer of the membrane is ...

Claims

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Application Information

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IPC IPC(8): B01D61/00B01D67/00B01D69/02B01D71/56
CPCB01D61/027B01D67/0093B01D67/0088B01D67/0006B01D69/02B01D71/56B01D2325/36B01D2325/14B01D2325/08
Inventor 陈英波马榕娄祎聪黄宸张涛
Owner TIANJIN POLYTECHNIC UNIV
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