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Reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane and solution technology, applied in the field of membrane separation, can solve the problems that fullerenes cannot be recombined, and achieve the effect of improving water flux, salt interception rate and good antibacterial performance

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing the reverse osmosis membrane, by functionalizing the metal fullerene and then compounding it with a polyamide functional layer, solving the problem that fullerenes cannot be directly and effectively compounded with the reverse osmosis membrane in the prior art The problem

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  • Reverse osmosis membrane and preparation method thereof

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preparation example Construction

[0026] Embodiment and comparative example are the preparation of reverse osmosis membrane, wherein embodiment 1 adds GdC in the oil phase solution 82 , Embodiment 2 adds hydroxylated GdC in the aqueous phase solution 82 , Comparative Example 1 is adding C in the oil phase solution 60 , Comparative Example 2 is adding C in the aqueous phase solution 60 of aqueous suspension.

[0027] C in Examples 1 and 2 82 Prepared by arc method, the specific steps are: high-purity graphite (purity>99.9%) and Gd 2 o 3 Mix thoroughly at a molar ratio of 1:25, add adhesive phenolic resin to form a film, and sinter in a high-temperature furnace at 1600 ° C. The fired graphite rod is discharged on a DC arc device to synthesize black soot. After solvent extraction with methylformamide (DMF), GdC was separated by HPLC 82 , with a purity of >99.9%.

Embodiment 2

[0028]GdC in Example 2 82 The specific steps of hydroxylation are: GdC with a concentration of 0.05mg / ml 82 The toluene solution and the NaOH aqueous solution with a mass fraction of 50% are mixed with a volume of 10:1, and the volume is 5% of the mixed solution, and tetrabutylammonium hydroxide (TBAH) with a mass fraction of 10% is used as a catalyst, and the reaction is stirred for 2 hours to remove colorless The toluene layer, the water layer was washed 3 times with toluene to remove unreacted GdC 82 , and then the water layer was evaporated to obtain a brown precipitate, which was dissolved in water and separated by Sephadex-25 chromatography column to obtain yellow hydroxylated GdC 82 . MALDI-TOF mass spectrometry showed that the prepared GdC 82 and GdC 82 (OH) 22 To compare the pure substances, infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS) show that the chemical formula of the hydroxylated metallofullerene is GdC 82 (OH) 22 .

[0029] C in...

Embodiment 1

[0031] A. Preparation of aqueous phase solution: m-phenylenediamine was dissolved and dispersed in ultrapure water to prepare an aqueous phase solution with a mass fraction of 2%.

[0032] B. Preparation of oil phase solution: Dissolve and disperse trimesoyl chloride in dodecane to prepare an oil phase solution with a mass fraction of 0.1%.

[0033] C. GdC 82 Dissolved in the oil phase solution, ultrasonically dispersed to make it uniform, the mass fraction is 0.02%.

[0034] D. Interfacial polymerization: Immerse the polysulfone support membrane in the above-mentioned prepared water phase solution, remove the remaining water phase solution after taking it out, and then contact the surface of the support membrane with the oil phase solution on one side to carry out interfacial polymerization reaction, the obtained After the nascent hybrid reverse osmosis membrane is taken out, it is dried in an oven at 70°C for 5 minutes, taken out, and then stored in ultrapure water.

[003...

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Abstract

The present invention relates to a reverse osmosis membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The reverse osmosis membrane comprises metal fullerene dispersed in the reverse osmosis membrane, wherein the metal fullerene is preferably Gd@C82, ie., metal gadolinium embedding C82. The present invention further provides a preparation method of the reverse osmosis membrane, wherein the method comprises: preparing a water phase solution with m-phenylenediamine dissolved inside and an oil phase solution with trimesoyl chloride dissolved inside, dissolving fullerene in the oil phase solution or dissolving hydroxylated fullerene in the water phase solution, and carrying out interfacial polymerization to obtain the reverse osmosis membrane. According to the present invention, the a unique cage-like structure, the nanometer pore structure and the good water molecule mass transfer channel effect of the metal fullerene are utilized to introduce the metal fullerene into the polyamide separation layer, such that the water flux and the salt rejection rate of the reverse osmosis membrane can be effectively improved, and the reverse osmosis membrane has good antibacterial property.

Description

technical field [0001] The invention relates to a reverse osmosis membrane and a preparation method thereof, in particular to a polyamide reverse osmosis composite membrane containing embedded metal fullerenes and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] Reverse osmosis is known as "the water purification technology of the 21st century". It has the advantages of high purification rate and low cost. It is widely used in the fields of brackish water and seawater desalination, ultrapure water preparation and industrial sewage treatment. The core of reverse osmosis technology is the research and development of high-performance reverse osmosis composite membranes. At present, commercial reverse osmosis composite membranes are mostly prepared by interfacial polymerization. Because polyamide contains good hydrophilic amide groups (-CONH-), and has good mechanical stability, thermal stability and hydrolytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/12B01D67/00C02F1/44
Inventor 苗小培黄文氢严昊
Owner CHINA PETROLEUM & CHEM CORP
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