High-temperature resistance polyamide composite membrane and preparation method thereof

A composite membrane and polyamide technology, which is applied in the field of water treatment, can solve the problems of loss of desalination performance of composite membrane, low operating temperature of polyamide composite membrane, waste of large energy, etc.

Inactive Publication Date: 2013-05-22
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the properties of the prepared materials, the existing polyamide composite membranes are not used at high temperatures
The operating temperature of the polyamide composite membrane is not higher than 45°C. When operating under high temperature conditions, the desalination performance of the composite membrane is basically lost, which limits the application of the composite membrane in high temperature water treatment environments.
The temperature of industrial wastewater is often high. Before ordinary membrane treatment, the temperature of wastewater needs to be lowered. This has brought at least two problems: the first is that a huge amount of money needs to be invested in the establishment of a large-scale wastewater transfer tank for cooling ; Second, cooling industrial wastewater requires a lot of wasted energy

Method used

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  • High-temperature resistance polyamide composite membrane and preparation method thereof
  • High-temperature resistance polyamide composite membrane and preparation method thereof
  • High-temperature resistance polyamide composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: prepare polyamide composite membrane according to the following steps:

[0019] Step 1: Prepare a porous membrane for use: Weigh 8g of polyether sulfone ketone (PPESK), 72g of polysulfone resin (PSF), 370g of N-methylpyrrolidone (NMP), polyethylene glycol 200 (PEG200) 50g, mix and prepare 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 porous membrane, which was stored in pure water at 25°C until use.

[0020] Step 2: Prepare two polymerized monomer solutions for use: Weigh 160g of m-phenylenediamine, 88g of triethylamine, 184g of camphorsulfonic acid, 80...

Embodiment 2

[0022] Embodiment 2: prepare polyamide composite membrane according to the following steps:

[0023] Step 1: Prepare porous membrane for use: Weigh 16g of polyethersulfone ketone (PPESK), 64g of polysulfone resin (PSF), 370g of N-methylpyrrolidone (NMP), polyethylene glycol 200 (PEG200) 50g, mix and prepare 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 porous membrane, which was stored in pure water at 25°C until use.

[0024] Step 2: Preparation of polymerized monomer solution: same as in Example 1.

[0025] Step 3: Preparation of polyamide composite membrane: Same as Exa...

Embodiment 3

[0026] Embodiment 3: prepare polyamide composite membrane according to the following steps:

[0027] Step 1: Prepare porous membrane for use: Weigh 24g of polyethersulfone ketone (PPESK), 56g of polysulfone resin (PSF), 370g of N-methylpyrrolidone (NMP), polyethylene glycol 200 (PEG200) 50g, mix and prepare 500g solution. Stir at 70°C for 6 hours to prepare a uniformly dispersed casting solution. After the casting solution is filtered and degassed, it is evenly coated on the non-woven fabric on a film scraping machine. The wet film thickness is 150 μm. After evaporating at room temperature for 3 seconds, it is immersed in ultrapure water at 18 ° C to form a gel and solidify the film. The membrane was treated in water at 70°C for 5 minutes, and stored in pure water at 25°C until use.

[0028] Step 2: Preparation of polymerized monomer solution: same as in Example 1.

[0029] Step 3: Preparation of polyamide composite membrane: Same as Example 1.

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Abstract

The invention discloses a high-temperature resistance polyamide composite membrane and a preparation method thereof. The high-temperature resistance polyamide composite membrane is composed of a non-woven fabric layer, a porous supporting layer and a polyamide layer, wherein a porous supporting membrane material is prepared by adding one or more of a solubility high-temperature resistance polymer P1 and a commodity polymer P2 for preparation of a porous membrane material to a certain solvent and a pore-foaming agent and at least contains the P1. The polyamide composite membrane prepared by the method has very good high-temperature resistance performance and can be widely applied to water treatment composite membrane treatment devices needing to run at a high temperature in industries such as industrial wastewater treatment, petrochemical wastewater treatment, food, medicines and the like.

Description

technical field [0001] The invention relates to a high-temperature-resistant polyamide composite membrane and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] Water treatment composite membrane materials such as nanofiltration membrane and reverse osmosis membrane have become one of the key technologies for water treatment because of their excellent separation performance for small organic molecules and inorganic salts, safety, environmental friendliness, and easy operation. Nanofiltration membranes and reverse osmosis membranes have been widely used in seawater and brackish water desalination, hard water softening, sewage treatment, ultrapure water preparation and other fields. Due to the limitations of the properties of the prepared materials, the existing polyamide composite membranes are not used at high temperatures. The operating temperature of the polyamide composite membrane is not higher than 45°C, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/12B01D69/10B01D67/00C02F1/44
Inventor 彭博邹昊刘旦姜莹路宏伟
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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