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A kind of anti-biological pollution composite reverse osmosis membrane and preparation method thereof

An anti-biological fouling, reverse osmosis membrane technology, applied in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of poor anti-biological fouling, low water flux, and reduced reverse osmosis membrane flushing in the polyamide desalination layer. frequency and other issues, to achieve good antibacterial and hydrophilic properties, widened flow channels, and excellent adsorption properties.

Active Publication Date: 2022-05-03
恩泰环保科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of poor biofouling resistance and low water flux of the polyamide desalination layer that occur during the use of the current composite reverse osmosis membrane, by introducing a highly hydrophilic and highly antibacterial compound into the m-phenylenediamine aqueous phase solution. Modified clay minerals and hydrophilic linking agent can improve the anti-biofouling performance and water flux of the composite reverse osmosis membrane, reduce the washing frequency of the reverse osmosis membrane, and maintain the excellent water flux and water flux of the reverse osmosis membrane during long-term use. Salt rejection rate

Method used

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  • A kind of anti-biological pollution composite reverse osmosis membrane and preparation method thereof
  • A kind of anti-biological pollution composite reverse osmosis membrane and preparation method thereof
  • A kind of anti-biological pollution composite reverse osmosis membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029]The preparation of an anti biological pollution composite reverse osmosis membrane is as follows:

[0030] (1) Weigh 10g of clay mineral montmorillonite and disperse it in deionized water, add 2G of guanidine modifier (guanidine acetic acid) and mix it evenly by ultrasonic, then add ammonia drop by drop until the solution pH = 8 ~ 9, raise the temperature to 35 ℃ under stirring conditions for reaction for 2h, then filter the mixture, wash it with ethanol to medium, freeze-dry and grind it to obtain modified clay minerals for standby;

[0031] (2) First dissolve 20g citric acid and 10g sodium hydroxide in deionized water and mix evenly to prepare acid binding agent, then successively add 20g m-phenylenediamine, 1g dopamine and 1g modified clay minerals into the above acid binding agent, dilute to 1000g with deionized water and disperse by ultrasonic for 30min to form modified aqueous phase solution for standby;

[0032] (3) Weigh 1g of homobenzoyl chloride and dissolve it in ...

Embodiment 2～5

[0037] The preparation method of anti biological pollution composite reverse osmosis membrane in examples 2 ~ 5 is basically the same as that in example 1, except that the addition amount of modified clay mineral and hydrophilic linker added in step (2) is different, as shown in Table 1:

[0038] Table 1

[0039]

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Abstract

The invention belongs to the technical field of reverse osmosis membranes, and in particular relates to an anti-biological pollution composite reverse osmosis membrane and a preparation method thereof. The preparation method includes: (1) adding m-phenylenediamine, hydrophilic linker and modified clay mineral to the acid-binding agent, and ultrasonically dispersing to form a modified aqueous phase solution; (2) dissolving trimesoyl chloride in organic (3) Soak the base film in the modified water phase solution for 0.5-1min, drain the excess water droplets on the surface, and then soak in the modified organic oil phase solution. React in the phase solution for 0.5-1min, and dry to obtain an anti-biological fouling composite reverse osmosis membrane. The anti-biological fouling composite reverse osmosis membrane prepared by the invention has anti-biological fouling performance and high water flux, so that the reverse osmosis membrane can maintain excellent water flux and desalination rate during long-term use.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membrane, in particular to an anti biological pollution composite reverse osmosis membrane and a preparation method thereof. Background technology [0002] With the increasing consumption of global water resources and the intensification of industrialization, the shortage of water resources will become one of the most important problems faced by human society in the 21st century. Therefore, in recent years, water treatment technology has gradually attracted people's attention, and some new water treatment technologies have been developed in continuous research. Reverse osmosis membrane technology has been widely used in brackish water purification, seawater desalination, sewage reuse and other fields because of its compact device, convenient installation, low operation energy consumption, low investment and good water quality. It is considered to be one of the best water treatment technologies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D67/00B01D69/02B01D69/12B01D71/56B01D71/68
CPCB01D71/56B01D69/02B01D69/12B01D67/0002B01D61/025B01D71/68B01D2325/36B01D2325/48Y02A20/131
Inventor 周兴蒙单连杰向豪刘涛
Owner 恩泰环保科技(常州)有限公司
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