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Preparation method of chlorine-resistant pollution-resistant polyamide reverse osmosis membrane

A technology of reverse osmosis membrane and polyamide membrane, applied in the field of preparation of reverse osmosis membrane, can solve the problems of poor chlorine resistance and pollution resistance, and achieve the effect of enhancing chlorine resistance and excellent separation performance

Inactive Publication Date: 2019-09-06
武汉纳霏膜科技有限公司
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of poor chlorine resistance and pollution resistance in the prior art, and propose a preparation method of a chlorine-resistant and pollution-resistant polyamide reverse osmosis membrane

Method used

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  • Preparation method of chlorine-resistant pollution-resistant polyamide reverse osmosis membrane

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0034] refer to figure 1 , a preparation method of a chlorine-resistant and pollution-resistant polyamide reverse osmosis membrane, comprising the following steps;

[0035] Step 1: benzene ring modified polymer, the specific steps are as follows;

[0036] A, use 4-methyldiphenylamine and 1,3,5-triformyl chloride cyclohexane to carry out interfacial polymerization preparation, obtain the polyamide membrane with reverse osmosis, polyamide membrane is in the sodium chloride feeding liquid concentration of 1500ppm and The rejection rate can reach 97.5% under the operating pressure of 1.5MPa, and the flux is 52 liters per square meter per hour;

[0037] B. Introduce sil...

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Abstract

The invention relates to the technical field of preparation of reverse osmosis membranes, in particular to a preparation method of a chlorine-resistant pollution-resistant polyamide reverse osmosis membrane. According to the preparation method, the chlorine-resistant pollution-resistant polyamide reverse osmosis membrane is prepared in the steps that a polymer is modified through a benzene ring, an organic nano fiber dispersion solution is prepared, an MOFs water dispersion solution is prepared, and the surface of the polyamide reverse osmosis membrane is modified. According to the preparationmethod, silver nitrate electronic groups are introduced to the acyl chloride benzene ring, the chlorine resistance of the polyamide reverse osmosis membrane is greatly improved accordingly, and the permeability of the polyamide reverse osmosis membrane cannot be influenced; the surface of the polyamide reverse osmosis membrane is modified, the organic nano fiber dispersion solution and the MOFs water dispersion solution are used for being introduced to the surface of the polyamide reverse osmosis membrane, and the polyamide reverse osmosis membrane with chlorine resistance, pollution resistance and good separation performance is constructed.

Description

technical field [0001] The invention relates to the technical field of preparation of reverse osmosis membranes, in particular to a preparation method of a chlorine-resistant and pollution-resistant polyamide reverse osmosis membrane. Background technique [0002] The reverse osmosis membrane refers to the reverse osmosis membrane door with different ultra-thin dense skin layer and support layer materials. Its main feature is that the ultra-thin dense layer is thin, the thinnest can reach 3Unrn, and the surface layer of the membrane is a one-dimensional structure; at present, polyamide reverse osmosis composite membrane Because of its high water production efficiency and high ion rejection rate, it has been widely used in seawater desalination, brackish water desalination, pharmaceuticals, biology and other fields; existing methods to improve the chlorine and pollution resistance of polyamide reverse osmosis membranes mainly include : Molecular main chain design and modifica...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D71/76B01D71/64B01D69/12B01D67/00B01D61/02
CPCB01D71/64B01D71/82B01D71/76B01D69/125B01D67/0006B01D61/025B01D2325/30
Inventor 顾彪
Owner 武汉纳霏膜科技有限公司
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