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Pollution-resistant polyamide composite membrane and preparation method thereof

A pollution-resistant, polyamide technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of good pollution resistance, achieve short production cycle, high water flux and salt interception rate, and microbial resistance And the effect of good pollution resistance

Active Publication Date: 2021-04-30
HUNAN OVAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of anti-pollution polyamide composite membrane, and the problem to be solved is: suitable for industrial production; good anti-pollution performance

Method used

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  • Pollution-resistant polyamide composite membrane and preparation method thereof
  • Pollution-resistant polyamide composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A pollution-resistant polyamide composite membrane, comprising a non-woven fabric layer, a polysulfone support layer, a polyamide layer and a pollution-resistant layer arranged in sequence, and the pollution-resistant layer is composed of dimethylhydantoin epoxy resin and unreacted A functional layer formed of a cross-linked polymer obtained through a cross-linking reaction of amine groups. Here dimethylhydantoin epoxy resin can be purchased from Sinopec Baling Petrochemical Co., Ltd.

[0033] The pollution-resistant polyamide composite membrane was prepared according to the following steps:

[0034] Prepare the anti-pollution solution, specifically: take 0.2 g of dimethylhydantoin epoxy resin and add it to 99.8 g of ethanol, stir until completely dissolved to obtain the anti-pollution solution;

[0035] Film making, comprises the following steps:

[0036] To make the substrate, specifically to arrange the non-woven fabric layer and the polysulfone support layer in se...

Embodiment 2

[0043] A kind of pollution-resistant polyamide composite membrane, differs from embodiment 1 in that:

[0044] In the prepared anti-pollution solution, weigh 0.4 g of dimethylhydantoin epoxy resin and add it to 99.6 g of ethanol, and stir until completely dissolved.

Embodiment 3

[0046] A kind of pollution-resistant polyamide composite membrane, differs from embodiment 1 in that:

[0047] In the prepared anti-pollution solution, 0.6 g of dimethylhydantoin epoxy resin was weighed and added to 99.4 g of ethanol, and stirred until completely dissolved.

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Abstract

The invention discloses a pollution-resistant polyamide composite membrane which comprises a base material, a polyamide layer and a pollution-resistant layer which are arranged in sequence, wherein the pollution-resistant layer is a functional layer formed by connecting hydantoin resin to a polyamide membrane through a chemical grafting method. The polyamide composite membrane obtained by the invention is simple in overall structure, and has the advantages of favorable microbial resistance, favorable pollution resistance, higher water flux, higher salt rejection rate and long service life. The invention further discloses a preparation method of the pollution-resistant polyamide composite membrane, which is simple and is short in the production period; the obtained pollution-resistant polyamide composite membrane is good in microorganism resistance and pollution resistance, high in water flux and salt rejection rate and long in service life.

Description

technical field [0001] The invention relates to the technical field of membrane making, in particular to a pollution-resistant polyamide composite membrane and a preparation method thereof. Background technique [0002] Polyamide composite membranes have the advantages of high rejection rate, large flux, good chemical stability, wide pH value, and low operating pressure requirements. Therefore, polyamide composite membranes have attracted more and more attention from researchers. [0003] However, due to the poor hydrophilicity of the aromatic polyamide membrane and the rough surface of the membrane, it is extremely susceptible to organic, inorganic and microbial contamination. Membrane fouling is still a key issue affecting the application of polyamide composite membranes, and seriously hinders the development of composite membranes. promotion. In practical applications, the membrane elements will be polluted to varying degrees (calcium carbonate precipitation, metal oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D67/00B01D65/10
CPCB01D69/12B01D67/0002B01D69/10B01D69/105B01D65/10B01D2323/46Y02A20/131
Inventor 彭博路宏伟胡群辉喻慧廖骞贺妍博彭军
Owner HUNAN OVAY TECH CO LTD
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