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Polyamide composite membrane and production method thereof

A composite membrane and polyamide technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reducing the retention rate of composite membranes, increasing water flux, etc. The effect of large quantity and short process flow

Active Publication Date: 2014-03-19
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the water flux of polyamide composite membranes, researchers added different additives to the reaction solution to promote the hydrolysis of polyacyl chlorides to form a loose active separation layer. However, in traditional polyamide composite membranes, the introduction of these additives, Will severely reduce the rejection rate of the composite membrane, while the water flux will only slightly increase

Method used

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  • Polyamide composite membrane and production method thereof
  • Polyamide composite membrane and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare high-throughput polyamide composite membranes as follows:

[0025] Preparation of support layer: Weigh 80g of polysulfone resin (PSF), 370g of N-methylpyrrolidone (NMP), and 50g of polyethylene glycol 200 (PEG200), and mix them to prepare a 500g solution. Stir at 70°C for 6 hours to prepare a uniformly dispersed casting solution. After the casting liquid is filtered and degassed, it is evenly coated on the non-woven fabric on a film scraping machine, with a wet film thickness of 150 μm. After evaporating at room temperature for 3 seconds, it is immersed in ultra-pure water at 18°C ​​to gel and solidify to form a film. , the membrane was treated in water at 70°C for 5 minutes to obtain a support layer, which was stored in pure water at 25°C until use.

[0026] Preparation of amine-containing solution: Weigh 239.2g of m-phenylenediamine, 0.8g of aniline, 88g of triethylamine, 184g of camphorsulfonic acid and 8g of sodium dodecylsulfonate, dissolve them in 7480g o...

Embodiment 2

[0031] The steps are the same as in Example 1, except that the amount of phenylenediamine in the amine solution is 236 g, and the amount of aniline is 4 g. See Table 1 for the data.

Embodiment 3

[0033]The steps are the same as in Example 1, except that the amount of phenylenediamine in the amine solution is 232 g, and the amount of aniline is 8 g. See Table 1 for the data.

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Abstract

The invention discloses a polyamide composite membrane and a production method thereof, which comprises a supporting layer and a polyamide layer, wherein the polyamide layer is prepared by reacting a polyamine compound, a monoamine compound and a polybasic acyl chloride compound. Compared with the prior art, the composite membrane provided in the invention obviously has high reject rate and higher water flux, so that the investment is saved, the energy consumption is reduced, the treating efficiency is increased, and wider application of the polyamide composite membrane can be developed.

Description

technical field [0001] The invention relates to the field of membranes for water treatment, in particular to a polyamide composite membrane with high flux. The present invention also relates to a preparation method of the above-mentioned composite membrane. Background technique [0002] Polyamide composite membrane is the most widely used composite membrane variety. Its structure is to form a layer of polyamide separation layer (such as US5160619, CN1724130A, etc.) through interfacial polymerization on a support layer (such as non-woven polysulfone). Polyamide composite membrane has the advantages of high rejection rate, large flux, excellent chemical stability, wide pH range (4-11), and low operating pressure requirements. Water flux is one of the most important performance parameters of polyamide composite membranes. The higher the water flux, the lower the energy consumption for treating the same amount of liquid. Although the energy utilization rate of large-scale wate...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D69/12B01D69/10B01D67/00
Inventor 彭博邹昊刘旦姜莹胡群辉唐莹路宏伟
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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