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A kind of synthetic method of graphene reverse osmosis composite membrane

A technology of graphene compounding and synthesis method, which is applied in the field of materials, can solve problems such as not being seen, and achieve the effects of low cost, high degree of dispersion, and improved mechanical strength

Active Publication Date: 2018-08-07
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A kind of synthetic method of graphene reverse osmosis composite membrane

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Embodiment 1

[0030] (1) In a flask, add graphene containing chloride (4.0 g), triethylamine (10 mL) and water (200 mL), and react with ultrasound. Aqueous ammonia (20 mL) was added and heated to reflux for 1 hour. Pour it into 300 mL of water, add dilute hydrochloric acid dropwise to adjust the pH to around 7. Filter, wash, and dry at 80°C for 10 hours. 3.7 g of amino-based graphene was obtained. The specific surface area of ​​amine-based graphene is 680 square meters per gram.

[0031] (2) In a flask, add amine-based graphene (1.0 g), add acryloyl chloride (12 g) and acetonitrile (30 mL). After ultrasonic dispersion for 1 hour, triethylamine was added and stirred for 3 hours. Heat to reflux for 3 hours. Filter, discard the filtrate, the solid powder is the intermediate, and wash with acetonitrile. Add acetonitrile (30 mL), acrylamide (4 g), and ammonium persulfate (0.4 g) to the intermediate. Heat at 80°C and stir for 12 hours. Adjust the concentration of the reaction system, and ...

Embodiment 2

[0033] (1) In a flask, add graphene containing chloride (1.00 g), sodium carbonate (0.80 g) and acetonitrile (20 mL), and react with ultrasound. Ethylenediamine (2 mL) was added and heated to reflux for 5 hours. Pour it into 30 mL of water, add dilute hydrochloric acid dropwise to adjust the pH to about 7. Filter, wash, and dry at 80°C for 10 hours. 0.94 g of amino-based graphene was obtained. The specific surface area of ​​amine-based graphene is 700 square meters per gram.

[0034] (2) In a flask, add amine-based graphene (0.8 g), add 3-butenoyl chloride (18 g) and acetonitrile (30 mL). After ultrasonic dispersion for 1 hour, triethylamine was added and stirred for 3 hours. Heat to reflux for 3 hours. Filter, discard the filtrate, the solid powder is the intermediate, add acetonitrile to wash. Acetonitrile (30 mL), ethyl acrylate (24 g) and azobisisobutyronitrile (1.4 g) were added to the intermediate. Heat to reflux for 17 hours. Adjust the concentration of the reac...

Embodiment 3

[0036] (1) In the flask, add graphene containing chloride (1.00 g), triethylamine (1 mL) and acetonitrile (20 mL), and react with ultrasound. Add 1,3-propanediamine (4 mL), and heat to reflux for 10 hours. Pour it into 30 mL of water, add dilute hydrochloric acid dropwise to adjust the pH to about 7. Filter, wash, and dry by heating at 80°C for 12 hours. 0.85 g of amino-based graphene was obtained. The specific surface area of ​​amine-based graphene is 740 square meters per gram.

[0037] (2) In a flask, add amine-based graphene (0.80 g), add cinnamoyl chloride (16 g) and acetonitrile (30 mL). After ultrasonic dispersion for 1 hour, triethylamine was added and stirred for 3 hours. Heat to reflux for 3 hours. Filter, discard the filtrate, the solid powder is the intermediate, add acetonitrile to wash. Acetonitrile (30 mL), 2-methyl methacrylate (20 g) and benzoyl peroxide (0.8 g) were then added to the intermediate. Heat at 100°C and stir for 10 hours. Adjust the concen...

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Abstract

The invention discloses a synthetic method of a graphene reverse osmosis composite membrane, and belongs to the technical field of materials. The method comprises the following steps: firstly preparing amido graphene , then mixing the amido graphene with a solvent, carrying out ultrasonic dispersion, adding unsaturated acyl chloride and triethylamine in sequence, stirring and heating to react; filtering, and washing to obtain an intermediate; adding monomers into a mixture of the intermediate and the solvent, stirring uniformly, then adding an initiator, heating and stirring to form the membrane. According to the reverse osmosis composite membrane prepared by the method, polymers are dispersed among layers, the polymers maintain the dispersion of the layers while the mechanical strength of the membrane is improved, and the reverse osmosis performance of graphene is also retained. The reverse osmosis composite membrane is good in performance, and fundamentally overcomes the defect such as small graphene specific surface area caused by excessive stacking of the layers in the graphene synthesis process. The synthetic graphene reverse osmosis composite membrane can be used for water treatment in the fields of electrons, information, energy resources, materials, biological medicine and the like.

Description

technical field [0001] The invention relates to a method for synthesizing a graphene reverse osmosis composite membrane, belonging to the technical field of materials. Background technique [0002] Reverse osmosis membrane has become one of the key technologies for water treatment because of its good separation performance for small organic molecules and inorganic salt ions, safety, environmental protection, and easy operation. It is mainly used in seawater and brackish water desalination, hard water softening, reclaimed water recovery, industrial wastewater treatment and ultrapure water preparation and other fields. At present, 90% of the reverse osmosis membranes on the market are composite membranes, and the performance of the membranes is optimized through composite methods. [0003] Graphene has a high specific surface area, large pore volume, and a large number of micropores and mesopores. Graphene itself is a membrane material that can be used as a reverse osmosis m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D61/02C02F1/44C02F101/20
CPCB01D61/02B01D69/12B01D69/125C02F1/441C02F2101/20
Inventor 王储备周建伟郭晖褚亮亮
Owner XINXIANG UNIV
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