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A kind of preparation method of titanium dioxide graphene oxide polyethylene glycol composite ceramic nanofiltration membrane

A technology of titanium dioxide and polyethylene glycol, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of difficult processing, high brittleness and high preparation cost, and achieve increased hydrophilic performance and enhanced anti-pollution. capacity, the effect of increasing the flux

Active Publication Date: 2022-01-04
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently widely used organic ceramic nanofiltration membranes are poor in high temperature resistance, acid and alkali resistance; while inorganic ceramic nanofiltration membranes are expensive to prepare, brittle and difficult to process

Method used

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  • A kind of preparation method of titanium dioxide graphene oxide polyethylene glycol composite ceramic nanofiltration membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Membrane tube treatment

[0023] Ultrasound the cut 100nm alumina ceramic membrane tube with a length of about 50cm for 5h, soak it in 2mol / L sodium hydroxide for 24h, dry it at 100°C for 10h, rinse the ceramic membrane tube with cellulose after cooling, and then wash it with ethanol and Rinse with deionized water for several times, put it into an oven and dry it at a set temperature of 100°C for 12 hours, and then cool with the oven to obtain the treated membrane tube.

[0024] 2. Prepare a 1 mg / L graphene oxide aqueous solution using a modified Hummers method. Then add the graphene oxide aqueous solution dropwise in the n-butyl titanate alcohol solution of 5mol / L at a speed of 1 drop / s, and then add 5mol / L nitric acid or hydrochloric acid for degumming, and the solution pH after degumming is 3-5. In the graphene oxide aqueous solution, the graphene oxide sheet is covered with nano-titanium dioxide particles in situ by a sol-gel method to prepare a titanium dioxide...

Embodiment 2

[0033] 1. Membrane tube treatment

[0034] Ultrasound the cut 100nm alumina ceramic membrane tube with a length of about 50cm for 5h, soak it in 2mol / L sodium hydroxide for 24h, dry it at 100°C for 10h, rinse the ceramic membrane tube with cellulose after cooling, and then wash it with ethanol and Rinse with deionized water for several times, put it into an oven and dry it at a set temperature of 100°C for 12 hours, and then cool with the oven to obtain the treated membrane tube. 2. Use the modified Hummers method to prepare a 4mg / L graphene oxide aqueous solution, and then add the graphene oxide aqueous solution dropwise at a rate of 1 drop / s to a 2mol / L isopropanol titanate solution, and then add 5mol / L of nitric acid or hydrochloric acid for degumming, the pH of the solution after degumming is 3-5, and the graphene oxide sheet is covered with nano-titanium dioxide particles in situ by the sol-gel method in the graphene oxide aqueous solution to prepare titanium dioxide / ...

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Abstract

The invention discloses a preparation method of a titanium dioxide graphene oxide polyethylene glycol composite ceramic nanofiltration membrane. The titanium dioxide / graphene oxide aqueous solution is synthesized in situ by a sol-gel method, and then mixed with polyethylene glycol The aqueous solution forms an organic functional layer through layer-by-layer self-assembly on the surface of the ceramic membrane activated by a strong alkali, thus obtaining the titanium dioxide graphene oxide polyethylene glycol composite ceramic nanofiltration membrane. The invention can increase the hydrophilic performance of the membrane layer by loading titanium dioxide on the graphene oxide, improve the flux of the membrane layer, thereby enhancing the anti-pollution ability of the membrane layer. Under the test condition of room temperature, it has a higher desalination rate for 0.2wt% magnesium sulfate solution and a higher flux of pure water.

Description

technical field [0001] The invention belongs to the technical field of nanofiltration membrane preparation, and in particular relates to a preparation method of titanium dioxide graphene oxide polyethylene glycol composite ceramic nanofiltration membrane. Background technique [0002] Nanofiltration membrane is a new type of pressure-driven membrane, the membrane pore size is between ultrafiltration and reverse osmosis, and can be used for the separation of divalent salts and monovalent salts. The main preparation methods of nanofiltration membranes include interfacial polymerization method, phase transfer method, charged chemical method and coating method. The interfacial polymerization method is currently the most important method for preparing organic nanofiltration membranes. During the interfacial polymerization process, there are strict requirements on monomer concentration, reaction time, reaction temperature and ambient humidity, which increases the difficulty of pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D65/10B01D67/00B01D69/12B01D71/02B01D71/38
CPCB01D61/027B01D69/12B01D69/125B01D71/024B01D67/0079B01D65/10B01D67/0083B01D71/38B01D2321/2075B01D2321/28
Inventor 陈云强洪昱斌蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN