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A nanostructured high-flux seawater desalination reverse osmosis membrane and its preparation method

A technology of reverse osmosis membrane and nanostructure, which is applied in the field of nanostructure high-flux seawater desalination reverse osmosis membrane and its preparation, can solve the problems of low flux and high energy consumption of the system, and achieve improved flux performance, reduced energy consumption, The effect of significant environmental value

Active Publication Date: 2018-02-13
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a nano-structured high-flux seawater desalination reverse osmosis membrane, which has the function of solving the high energy consumption of the system caused by the low flux of the reverse osmosis membrane in the prior art. characteristics of technical problems

Method used

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  • A nanostructured high-flux seawater desalination reverse osmosis membrane and its preparation method
  • A nanostructured high-flux seawater desalination reverse osmosis membrane and its preparation method
  • A nanostructured high-flux seawater desalination reverse osmosis membrane and its preparation method

Examples

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Embodiment 1

[0025] A method for preparing a nanostructure high-flux seawater desalination reverse osmosis membrane, comprising the following steps:

[0026] (1) Preparation of polymer support layer: 30g polyvinylpyrrolidone and 780gDMF are mixed and dispersed, and a stirring speed of 60r / min is used for stirring, so that polyvinylpyrrolidone is uniformly dispersed in the DMF solution, and then the stirring speed is maintained, and then Wherein add 60g of natural nanocrystals, after stirring for 30min, add polymer to it again, make the concentration of polymer in solution be 19wt%, obtain polymer solution; Polymer solution is carried out vacuum defoaming under-80kpa again Filter after treatment to obtain a bubble-free and impurity-free solution; then apply the bubble-free and impurity-free solution to the non-woven fabric substrate, then place it in deionized water, adjust the temperature to 28°C, and obtain a polymer support after treatment for 170s layer;

[0027] (2) Preparation of the...

Embodiment 2

[0038] On the basis of Example 1, the others are the same as in Example 1, a method for preparing a nanostructured high-flux seawater desalination reverse osmosis membrane, comprising the following steps:

[0039] (1) Preparation of the polymer support layer: 30g polyvinylpyrrolidone and 780gDMF are mixed and dispersed, and the stirring speed is 90r / min, so that the polyvinylpyrrolidone is uniformly dispersed in the DMF solution, then the stirring speed is maintained, and then Add 60g of natural nanocrystals therein, after stirring for 50min, add polymer therein, so that the concentration of the polymer in the solution is 19wt%, to obtain a polymer solution; then the polymer solution is vacuum degassed at -81kpa Filter after treatment to obtain a bubble-free and impurity-free solution; then apply the bubble-free and impurity-free solution to the non-woven fabric substrate, then place it in deionized water, adjust the temperature to 31°C, and obtain a polymer support after treat...

Embodiment 3

[0050] On the basis of Example 1, the others are the same as in Example 1, a method for preparing a nanostructured high-flux seawater desalination reverse osmosis membrane, comprising the following steps:

[0051] (1) Preparation of the polymer support layer: 30g polyvinylpyrrolidone and 720gDMF are mixed and dispersed, and the stirring speed is 75r / min, so that the polyvinylpyrrolidone is uniformly dispersed in the DMF solution, then the stirring speed is maintained, and then Add 30g of natural nanocrystals therein, after stirring for 40min, add polymer therein, so that the concentration of the polymer in the solution is 19wt%, to obtain a polymer solution; then the polymer solution is vacuum degassed at -80kpa Filter after treatment to obtain a bubble-free and impurity-free solution; then apply the bubble-free and impurity-free solution to the non-woven fabric substrate, then place it in deionized water, adjust the temperature to 30°C, and obtain a polymer support after treat...

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Abstract

The invention relates to the technical field of reverse osmosis membranes and particularly relates to a nanostructure high-flux reverse osmosis membrane for seawater desalination and a preparation method therefor. According to the nanostructure high-flux reverse osmosis membrane for seawater desalination and the preparation method therefor, through carrying out steps, i.e., preparing a polymer supporting layer, contacting natural nanocrystals and preparing a desalination layer or preparing the polymer supporting layer, preparing the desalination layer, and the like, adjusting process parameters of a preparation process for the nanostructure high-flux reverse osmosis membrane for seawater desalination, combining the polymer supporting layer and the natural nanocrystals, and subjecting the combination and an active oil-phase monomer to a reaction in the presence of an active hydrophilic stabilizer, a high-flux desalination layer can be formed in an accurate and directive manner, then, the water flux of the reverse osmosis membrane for seawater desalination is increased, the energy consumption in an application process is lowered, and thus, the reverse osmosis membrane has a remarkable environmental protection value; and the usage amount and adding sequence of raw materials are controlled, so that the nanostructure high-flux reverse osmosis membrane for seawater desalination is low in preparation cost and has remarkable economic benefit.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis membranes, in particular to a nanostructure high-flux seawater desalination reverse osmosis membrane and a preparation method thereof. Background technique [0002] Traditional reverse osmosis membranes for seawater desalination use solute and solvent to mix, dissolve and disperse evenly, then add polymer to it, and then place the polymer material in a treatment agent for treatment, thereby forming a desalination layer on the surface layer, but the specific treatment of the desalination layer and how to adjust it better can increase its flux, or after increasing the flux, how to improve the quality of permeate water and reduce the energy consumption of the application process has not been solved; Furthermore, some reverse osmosis membranes in the prior art have high desalination rate, but their flux is low, resulting in high energy consumption; Poor, which makes the reverse osmosis membra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/08B01D69/10B01D67/00C02F1/44C02F103/08
CPCY02A20/131
Inventor 梁松苗蔡志奇吴宗策金焱
Owner VONTRON TECH CO LTD
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