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A kind of high-performance nano-hybrid reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane, high-performance technology, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., can solve problems such as easy shedding, nano-material agglomeration, reduce shedding, reduce hydrolysis, and improve industrialization efficiency Effect

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

AI Technical Summary

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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  • A kind of high-performance nano-hybrid reverse osmosis membrane and preparation method thereof
  • A kind of high-performance nano-hybrid reverse osmosis membrane and preparation method thereof
  • A kind of high-performance nano-hybrid reverse osmosis membrane and preparation method thereof

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Effect test

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 embodiment 2~9 is basically the same as embodiment 1, and difference is only: the aqueous phase modifying agent that adds 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 in particular relates to a high-performance nano-hybrid reverse osmosis membrane and a preparation method thereof. The preparation method includes: (1) uniformly mixing camphorsulfonic acid and triethylamine as a catalyst, then adding m-phenylenediamine, a water phase modifier and a crosslinking agent, adding deionized water, and mixing uniformly to form m-phenylenediamine Aqueous amine solution; (2) dissolving trimesoyl chloride in an organic solvent, then adding nano-precursor, mixing uniformly, and then adjusting the pH of the solution to 4 to 5 to obtain a modified trimesoyl chloride oil phase solution; (3 ) Soak the porous support layer in the m-phenylenediamine aqueous phase solution for 0.5-1min, then soak in the modified trimesoyl chloride oil phase solution for 0.5-1min, and dry to obtain high-performance nano-hybrid reverse osmosis membrane. The invention introduces the nano material 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 thereof 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 Patents(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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