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Polyamide reverse osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and polyamide, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of low water flux, limited water flux improvement, and affecting the polyamide layer, etc. The effect of streamlining, increasing water flux, and improving performance stability

Active Publication Date: 2020-11-27
HUNAN OVAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods often affect the structure of the polyamide layer through a single aspect, and the improvement of water flux is limited.
[0004] In summary, there is an urgent need for a polyamide reverse osmosis membrane and its preparation method to solve the problem of low water flux in the prior art

Method used

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  • Polyamide reverse osmosis membrane and preparation method thereof
  • Polyamide reverse osmosis membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A polyamide reverse osmosis membrane, comprising a porous support membrane and a polyamide layer containing carbon quantum dots grown on the surface of the porous support membrane, the polyamide layer containing carbon quantum dots includes the following raw material components in mass percentage: amination Carbon quantum dots (abbreviated as NH 2 -CQDs), oil phase reactive monomers, oil phase solvents, acid acceptors, pH regulators and surfactants.

[0032] The oil phase reaction monomer is trimesoyl chloride (abbreviated as TMC); the oil phase solvent is n-hexane.

[0033] The pH regulator is camphorsulfonic acid and triethylamine; the surfactant is sodium dodecylsulfonate.

[0034] The size of the amidated carbon quantum dot is 1-20nm.

[0035] The thickness of the polyamide layer containing carbon quantum dots is 100-300nm.

[0036] The porous support membrane is a polysulfone porous support membrane.

[0037] A preparation method of the polyamide reverse osmosi...

Embodiment 2

[0047] The difference from Example 1 is that the mass ratio of pure water: amidated carbon quantum dots: camphorsulfonic acid: triethylamine: sodium dodecylsulfonate in step 2 is 92.59:4:2.3:1.1:0.01 , other unchanged.

Embodiment 3

[0049] The difference from Example 1 is that in the step 2, the mass ratio of pure water: amidated carbon quantum dots: camphorsulfonic acid: triethylamine: sodium dodecylsulfonate is 91.59:5:2.3:1.1:0.01 , other unchanged.

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Abstract

The invention provides a polyamide reverse osmosis membrane and a preparation method thereof. The membrane comprises a porous support membrane and a carbon quantum dot-containing polyamide layer growing on the surface of the porous support membrane, and the carbon quantum dot-containing polyamide layer comprises the following raw material components: aminated carbon quantum dots, an oil-phase reaction monomer, an oil-phase solvent, an acid acceptor, a pH regulator and a surfactant; the preparation method comprises the following steps: 1, preparing aminated carbon quantum dots; and 2, preparingthe polyamide reverse osmosis membrane. According to the polyamide reverse osmosis membrane disclosed by the invention, the aminated carbon quantum dots are used as a novel water-phase reaction monomer, and a polyamide layer structure containing the carbon quantum dots is formed on the polysulfone porous support membrane by directly carrying out a cross-linking reaction on amino groups on the aminated carbon quantum dots and trimesoyl chloride, so that the water flux can be improved from multiple aspects.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis membrane preparation, in particular to a polyamide reverse osmosis membrane and a preparation method thereof. Background technique [0002] In recent years, reverse osmosis technology is considered to be one of the most effective water purification technologies, and is widely used in seawater desalination, brackish water desalination, reclaimed water reuse, sewage treatment and pure water preparation and other fields. As the most important type of reverse osmosis membrane, polyamide composite membrane has the advantages of excellent chemical stability, good mechanical strength and wide pH tolerance range. The polyamide composite membrane is mainly composed of non-woven fabric layer, polysulfone-based membrane layer and polyamide layer. As one of the core performance parameters of reverse osmosis membrane, water flux is of great significance in terms of energy saving, emission reduction and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D71/56B01D61/02C02F1/44
CPCB01D67/0079B01D71/56B01D69/02B01D69/10B01D61/025C02F1/441B01D2325/36Y02A20/131
Inventor 廖骞路宏伟彭博胡群辉喻慧汤科
Owner HUNAN OVAY TECH CO LTD
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