High-performance nano hybrid reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane, a high-performance technology, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., can solve the problems of nanomaterial agglomeration and easy shedding, and achieve reduced hydrolysis, reduced shedding, and excellent anti-pollution performance Effect

Active Publication Date: 2020-04-07
恩泰环保科技(常州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the defects of agglomeration of nanomaterials and easy shedding in the later stage in the process of introducing nanomaterials into reverse osmosis membranes in the prior art, the present invention provides a high-performance nano-hybrid reverse osmosis membrane and its preparation method, which avoids direct The agglomeration and precipitation phenomenon caused by adding nanomaterials to the water phase or oil phase solution improves the industrial production efficiency of reverse osmosis membranes, and has high water flux and desalination rate

Method used

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  • High-performance nano hybrid reverse osmosis membrane and preparation method thereof
  • High-performance nano hybrid reverse osmosis membrane and preparation method thereof
  • High-performance nano hybrid reverse osmosis membrane and preparation method thereof

Examples

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Embodiment 1

[0028] A preparation of a high-performance nano-hybrid reverse osmosis membrane, the specific implementation steps are as follows:

[0029] (1) 40g camphorsulfonic acid and 25g triethylamine are mixed uniformly earlier, as catalyst, then add 20g m-phenylenediamine, 15g dimethylformamide (aqueous phase modifier) ​​and 15g chitosan (crosslinking agent) successively agent), then diluted to 1000g, and mixed uniformly to obtain m-phenylenediamine aqueous phase solution;

[0030] (2) Dissolve 2g of trimesic acid chloride in n-hexane (organic solvent), then add 0.1g of tetraethyl orthosilicate (nano-precursor) and mix evenly, and add a small amount of glacial acetic acid to adjust the pH value of the solution to 5 to obtain Modified trimesoyl chloride oil phase solution;

[0031] (3) First, the porous polysulfone support layer is placed in the m-phenylenediamine aqueous phase solution obtained in step (1) and soaked for 0.5 min, and then soaked in the modified trimesoyl chloride oil...

Embodiment 2～9

[0034] The preparation method of the high-performance nano-hybrid reverse osmosis membrane in Examples 2~9 is basically the same as Example 1, and the difference is only: the aqueous phase modifying agent added in the step (1), cross-linking agent and step ( 2) The type and amount of the nano-precursor added are different, as shown in Table 1:

[0035] Table 1

[0036]

[0037]

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Abstract

The invention belongs to the technical field of reverse osmosis membranes, and particularly relates to a high-performance nano hybrid reverse osmosis membrane and a preparation method thereof. The preparation method comprises the following steps: (1) mixing camphorsulfonic acid and triethylamine well to obtain a mixture as a catalyst, adding m-phenylenediamine, an aqueous phase modifier and a cross-linking agent, adding deionized water, and mixing the substances well to form an m-phenylenediamine aqueous phase solution; (2) dissolving trimesoyl chloride in an organic solvent, adding a nano precursor, mixing well, and adjusting the pH value of the solution to 4-5 to obtain a modified trimesoyl chloride oil phase solution; and (3) soaking a porous support layer in the m-phenylenediamine aqueous phase solution first for 0.5-1min, then soaking the porous support layer in the modified trimesoyl chloride oil phase solution for reaction for 0.5-1min, and drying the porous support layer to obtain the high-performance nano hybrid reverse osmosis membrane. The nano material is introduced in situ, so that the nano particles in the desalination layer on the surface of the nano hybrid reverse osmosis membrane are uniformly dispersed, and the water flux and desalination rate of the nano hybrid reverse osmosis membrane are improved.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membranes, and in particular relates to an anti-high-performance nano-hybrid reverse osmosis membrane and a preparation method thereof. Background technique [0002] At present, with the rise of printing and dyeing, chemical industry, electronics, medicine and other industries in the world, the pollution of water resources is increasing year by year, and the number of polluted water bodies is increasing day by day. Coupled with the large-scale arid areas in my country, the salt content of groundwater is too high, and the water quality is bitter. Unable to drink directly, the shortage of fresh water resources has become a global environmental problem. Water purification, desalination of seawater and brackish water will be one of the effective means to solve the current shortage of drinking water resources. Due to the advantages of good separation effect, low energy consumption, small footpr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D67/00B01D69/02B01D71/56
CPCB01D61/025B01D71/56B01D69/02B01D67/0006B01D2325/36Y02A20/131
Inventor 周兴蒙向豪刘涛单连杰
Owner 恩泰环保科技(常州)有限公司
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