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Preparation method and preparation device of high-efficiency anti-pollution reverse osmosis membrane

A reverse osmosis membrane, anti-pollution technology, used in semi-permeable membrane separation, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., can solve the problems of short service life, no antibacterial and bactericidal effect

Inactive Publication Date: 2017-05-31
XIAMEN BAILIN WATER PURIFICATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, reverse osmosis membranes such as cellulose acetate membranes, aromatic polyhydrazide membranes or aromatic polyamide membranes are easily oxidized and have a short service life. At the same time, they do not have antibacterial and bactericidal effects.

Method used

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  • Preparation method and preparation device of high-efficiency anti-pollution reverse osmosis membrane
  • Preparation method and preparation device of high-efficiency anti-pollution reverse osmosis membrane
  • Preparation method and preparation device of high-efficiency anti-pollution reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing an efficient anti-pollution reverse osmosis membrane, comprising the following steps:

[0029] Plasma modification treatment

[0030] Pass the reverse osmosis membrane substrate at a speed of 0.5m / min through a plasma device with a plate spacing of 2mm, and introduce carbon dioxide gas with an atmosphere of 40 sccm, and the frequency of the radio frequency power used by the plasma device is 8KHz.

[0031] Membrane Surface Graft Modification

[0032] Pass the plasma-treated reverse osmosis substrate through a solution containing 20% ​​polystyrene sulfamic acid at a speed of 0.5 m / min, and the solvent used is polyvinylpyrrolidone and dimethyl Formamide mixed solution.

[0033] drying treatment

[0034] The reverse osmosis modified by surface grafting is processed at a speed of 0.5 m / min through an oven section with a temperature of 60°C.

[0035] wind up

[0036] Pass the dried reverse osmosis membrane through the air-cooling system and then wi...

Embodiment 2

[0038] A method for preparing an efficient anti-pollution reverse osmosis membrane, comprising the following steps:

[0039] Plasma modification treatment

[0040] Pass the reverse osmosis membrane substrate at a speed of 0.6m / min through a plasma device with a plate spacing of 2mm, and introduce carbon dioxide gas with an atmosphere of 40 sccm, and the frequency of the radio frequency power used by the plasma device is 8KHz.

[0041] Membrane Surface Graft Modification

[0042] Pass the plasma-treated reverse osmosis substrate through a solution containing 20% ​​polystyrene sulfamic acid at a speed of 0.6 m / min, and the solvent used is polyvinylpyrrolidone and dimethyl Formamide mixed solution.

[0043] drying treatment

[0044] The reverse osmosis modified by surface grafting is processed at a speed of 0.6m / min through an oven section with a temperature of 60°C.

[0045] wind up

[0046] Pass the dried reverse osmosis membrane through the air-cooling system and then win...

Embodiment 3

[0048] A method for preparing an efficient anti-pollution reverse osmosis membrane, comprising the following steps:

[0049] Plasma modification treatment

[0050] Pass the reverse osmosis membrane substrate at a speed of 0.8m / min through a plasma device with a plate spacing of 2mm, and introduce carbon dioxide gas with an atmosphere of 50 sccm, and the frequency of the radio frequency power used by the plasma device is 10KHz.

[0051] Membrane Surface Graft Modification

[0052] Pass the plasma-treated reverse osmosis substrate through a solution containing 20% ​​polystyrene sulfamic acid at a speed of 0.8 m / min, and the solvent used is polyvinylpyrrolidone and dimethyl mixed solution of methyl formamide.

[0053] drying treatment

[0054] The reverse osmosis modified by surface grafting is processed at a speed of 0.8m / min through an oven section with a temperature of 50°C.

[0055] wind up

[0056] Pass the dried reverse osmosis membrane through the air-cooling system a...

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Abstract

The invention discloses a preparation method of a high-efficiency anti-pollution reverse osmosis membrane. The preparation method comprises the following steps of treating a base material of the reverse osmosis membrane by plasma; treating by an organic phase containing an additive, wherein the organic phase is polystyrene sulfamic acid or polyvinyl sulfamic acid, the additive is a polyvinyl pyrrolidone and dimethylformamide mixture, and the mixing volume ratio is 1:4; then, drying the base material of the reverse osmosis membrane, so as to obtain the high-efficiency anti-pollution reverse osmosis membrane. The invention also discloses a preparation device of the high-efficiency anti-pollution reverse osmosis membrane. The prepared reverse osmosis membrane has the advantages that the pure water flux and desalting rate are good, the high-efficiency anti-pollution effect is realized, and the service life of the reverse osmosis membrane is prolonged.

Description

technical field [0001] The invention relates to the technical field of water treatment and concentration separation, in particular to a preparation method and a preparation device of a high-efficiency anti-pollution reverse osmosis membrane. Background technique [0002] Reverse osmosis membrane is an artificial semipermeable membrane made of simulated biological semipermeable membrane, generally made of polymer materials, such as cellulose acetate membrane, aromatic polyhydrazide membrane or aromatic polyamide membrane. The diameter of micropores on the surface of the reverse osmosis membrane is generally between 0.1-1nm, and the permeability is related to the chemical structure of the membrane itself. Reverse osmosis membranes can be used in chemical unit operations such as separation, concentration, and purification, and are mainly used in pure water preparation and water treatment industries. [0003] The reverse osmosis membrane uses the pressure difference as the driv...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02C02F1/44
CPCB01D67/0002B01D69/02C02F1/441
Inventor 金碧戴杰辉孙昇凌林冠廷李明仁
Owner XIAMEN BAILIN WATER PURIFICATION TECH CO LTD
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