Black talc nano particle modified polyamide composite nano-filtration membrane

A technology of nanoparticle modification and composite nanofiltration membrane, which is applied in membrane, membrane technology, semi-permeable membrane separation, etc. It can solve the problems of poor separation performance, low mechanical strength, and easy contamination of the membrane, and achieve low production cost, Excellent mechanical properties and the effect of improving water flux

Active Publication Date: 2021-05-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the prior art that the membrane is easily polluted, the separation performance is poor, and the mechanic

Method used

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  • Black talc nano particle modified polyamide composite nano-filtration membrane
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  • Black talc nano particle modified polyamide composite nano-filtration membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040]Example 1

[0041](1) Turn 10 g of black tide (black slide origin from Guangfeng District, Jiangxi Province, Guangfeng District), with a ball mill 600R / min wet milling for 5 h, washed with centrifugation, to obtain 8.8 g of black and slipper nanoparticles (average particle size 220 nm ). Then, 0.369 g of black and slipper nanoparticles were added to a 20 mL N-methylpyrrolidone solvent, ultrasonic (100 W 40 kHz) 1 h, which was uniformly dispersed, then 3.86 g of polysulfone was stirred and dissolved for 12 h, and stand stable to form 28 ml stable. The uniform cast film solution.

[0042](2) Scrape 2 ml of cast film liquid on the glass plate with a doctor blade, and rapidly placed in the deionized water coagulation bath, and after the transformation is complete, 130cm is obtained.2The black slide nanoparticle / polysulfone support layer transferred the black slide nanoparticle / polysulfone support layer to deionized water to continuing solvent exchange 24H spare.

[0043](3) Immersion...

Example Embodiment

[0045]Example 2

[0046](1) Turn 10G black tide (black slide from the Guangfeng District of Jiangxi Province, Guangfeng District), with a ball mill 600R / min wet milling for 5 h, washed, centrifuged, and obtained 8.8 g of black and slipper nanoparticles (the average particle size is 220nm). Then, 0.215 g of black and slipper nanoparticles were added to a 20 mL N-methylpyrrolidone solvent, ultrasonic (100 W 40 kHz) 1.5 h, which was uniformly dispersed, then 2.58 g of polysulfone was added to dissolve 12h, and stand stratented to form 26ml. Stable uniform cast film solution.

[0047](2) Scratch 2 ml of cast film liquid is applied to the glass plate using a doctor blade, and rapidly placed in a deionized water coagulation bath. After the phase is transformed, 130cm will be 130cm.2The black slide nanoparticle / polysulfone support layer was transferred to deionized water to continue the solvent exchange 24h.

[0048](3) Take the black-slip nanoparticle / polysulfone porous support film for 3 mi...

Example Embodiment

[0050]Example 3

[0051](1) Turn 10G black tide (black slide from the Guangfeng District of Jiangxi Province, Guangfeng District), with a ball mill 600R / min wet milling for 5 h, washed, centrifuged, and obtained 8.8 g of black and slipper nanoparticles (the average particle size is 220nm). Then, 0.826 g of black and slipper nanoparticles were then added to 15 ml N-methylpyrrolidone solvent, ultrasonic (100 W 40 kHz) 1 h, which was uniformly dispersed, then 2.48 g of polysulfone was added to dissolve 12h, and stand stable to form 27 mL stable. The uniform cast film solution.

[0052](2) Scratch 2 ml of cast film liquid is applied to the glass plate using a doctor blade, and rapidly placed in a deionized water coagulation bath. After the phase is transformed, 130cm will be 130cm.2The black slide nanoparticle / polysulfone support layer was transferred to deionized water to continue to perform solvent exchange 24 h.

[0053](3) Take the black-slip nanoparticle / polysulfone porous support fil...

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Abstract

The invention discloses a black talc nano particle modified polyamide nano-filtration membrane and a preparation method thereof. Black talc nano particles are used as a membrane modification material for the first time, the black talc nano particles are added into a membrane casting solution and stirred uniformly, the membrane is scraped after standing and defoaming, so that the membrane is introduced into a supporting membrane, and then the black talc nano particle blending modified polyamide nano-filtration membrane is prepared through an interface polymerization method. The pore diameter structure and porosity of the support membrane are effectively adjusted by adopting a modification method of introducing black talc nano particles into the support membrane, effective regulation and control on the PA active layer structure and the separation performance of the nano-filtration membrane are realized, and the water flux, mechanical strength and anti-pollution performance of the membrane can be greatly improved without influencing the separation performance; and the membrane preparation method is low in cost, simple and controllable, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and particularly relates to a polyamide composite nanofiltration modified by black talc nanoparticles to improve the separation performance, membrane strength and membrane anti-pollution performance of polyamide nanofiltration membranes by adding black talc nanoparticles Membrane Preparation Method. Background technique [0002] Due to rapid population and economic growth, water pollution and water scarcity have become global challenges. Current research is generally devoted to developing advanced materials and technologies that can be used to increase freshwater supplies through desalination or wastewater recycling. Among all existing seawater desalination technologies, pressure-driven membrane technology, such as reverse osmosis (RO) and nanofiltration (NF), is one of the most efficient and promising technologies. Among them, the nanofiltration membrane can realize the inter...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D61/00B01D69/10B01D67/00
CPCB01D69/12B01D61/027B01D69/10B01D69/105B01D67/0079B01D2325/24
Inventor 张国亮范子璇张旭孟琴
Owner ZHEJIANG UNIV OF TECH
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