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Preparation method of ammonolysis oxidized graphene-based 3D (Three-dimensional) nanoparticle modified organic separation membrane

A nanoparticle modification, graphene-based technology, applied in the field of membrane separation, can solve the problems of easy agglomeration of inorganic nanoparticles, uneven film formation, and poor particle dispersion effect.

Active Publication Date: 2017-04-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0005] However, inorganic nanoparticles are very easy to agglomerate, and general direct addition will lead to poor particle dispersion and uneven film formation.

Method used

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  • Preparation method of ammonolysis oxidized graphene-based 3D (Three-dimensional) nanoparticle modified organic separation membrane

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preparation example Construction

[0023] A method for preparing an ammoniated graphene oxide-based 3D nanoparticle modified organic separation membrane, comprising the steps of:

[0024] 1) Preparation of graphene oxide-based 3D nanoparticles: prepare a mixed solution of absolute ethanol and pure water with a concentration of 60-95wt%, and add 2-50 mg, 50-500 mesh graphene oxide powder into 1L of the mixed solution according to the mass ratio , adjust the pH value of the mixed solution to about 8.0-9.0 to obtain an alkaline solution, drop 0.5-5 mg of tetraethyl orthosilicate into 1L alkaline solution, ultrasonicate, store at room temperature, centrifuge, and wash repeatedly with absolute ethanol The filter cake was vacuum freeze-dried for 24 hours, and the obtained graphene oxide-based 3D nanoparticles were stored for future use;

[0025] 2) Preparation of ammoniated graphene oxide-based 3D nanoparticles: Disperse graphene oxide-based 3D nanoparticles in ethanol at a mass ratio of 1: (30-100), heat to 70-80°C,...

Embodiment 1

[0034] 1) Preparation of graphene oxide-based 3D nanoparticles: prepare a mixed solution of 60wt% absolute ethanol and pure water, add 2mg, 300 mesh graphene oxide powder to 1L mixed solution, and adjust the pH value of the mixed solution to 8.0, drop 0.5mg tetraethyl orthosilicate into 1L of alkaline solution, ultrasonicate, store at room temperature, centrifuge, and repeatedly wash the filter cake with absolute ethanol, vacuum freeze-dry for 24 hours, and store the obtained graphene oxide-based 3D nanoparticles for later use;

[0035]2) Preparation of ammoniated graphene oxide-based 3D nanoparticles: disperse 1 part of 3D graphene oxide-based nanoparticles in 30 parts of ethanol, and heat to 80°C, then add 1 wt% 3-aminopropane Trimethoxysilane (APS), the solution was refluxed for 2 hours, centrifuged, washed 4 times with a large amount of ethanol, and dried in an oven at 55°C for 12 hours to obtain amino-modified ammoniated graphene oxide-based 3D nanoparticles.

[0036] 3) ...

Embodiment 2

[0038] 1) Preparation of graphene oxide-based 3D nanoparticles: prepare a mixed solution of 70wt% absolute ethanol and pure water, add 10 mg, 500 mesh graphene oxide powder to 1L mixed solution, and adjust the pH value of the mixed solution to 8.5. Add 1mg tetraethyl orthosilicate dropwise to 1L of alkaline solution, sonicate, store at room temperature, centrifuge, and wash the filter cake repeatedly with absolute ethanol, freeze-dry in vacuum for 24 hours, and store the obtained graphene oxide-based 3D nanoparticles for later use;

[0039] 2) Preparation of ammoniated graphene oxide-based 3D nanoparticles: Disperse 1 part of 3D graphene oxide-based nanoparticles in 45 ethanol and heat to 80°C, then add 1 wt% 3-aminopropyl Trimethoxysilane (APS), the solution was refluxed for 2 hours, centrifuged, washed 3 times with a large amount of ethanol, and dried in an oven at 45°C for 12 hours to obtain amino-modified ammoniated graphene oxide-based 3D nanoparticles.

[0040] 3) Prepar...

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Abstract

The invention discloses a preparation method of an ammonolysis oxidized graphene-based 3D (Three-dimensional) nanoparticle modified organic separation membrane. The preparation method of the ammonolysis oxidized graphene-based 3D nanoparticle modified organic separation membrane comprises the steps of preparing oxidized graphene-based 3D nanoparticles; preparing ammonolysis oxidized graphene-based 3D nanoparticles; adopting a polymer ultrafiltration membrane as a basement membrane, and dispersing the oxidized graphene-based 3D nanoparticles into a polyamine aqueous phase solution and a multiple acyl chloride oil phase solution; soaking, solidifying, rinsing and air drying to obtain the oxidized graphene-based 3D nanoparticle modified organic separation membrane. By adding the oxidized graphene-based 3D nanoparticles into a nanofiltration membrane separation layer, so that the hydrophilia, the permeability and the retention characteristic of the separation membrane are well improved. The novel ammonolysis oxidized graphene-based 3D nanoparticle modified organic separation membrane can be widely applied in various fields of environment, biology, medicine, food and the like.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to a method for preparing an ammoniated graphene oxide-based 3D nanoparticle-modified organic separation membrane. Background technique [0002] Membrane separation technology is gradually playing an increasingly important role in all aspects of modern society. Membrane separation technology refers to the use of selectively permeable membranes as the separation medium. When there is a certain driving force on both sides of the membrane, the components on the raw material side Selectively permeate the membrane to achieve the purpose of separation and purification. Membrane separation technology mainly includes microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis, liquid membrane separation, gas membrane separation, electrodialysis, etc. [0003] The reverse osmosis membrane (Reverse Osmosis, referred to as RO) can use the static pressure diffe...

Claims

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Application Information

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IPC IPC(8): B01D67/00
CPCB01D67/0079
Inventor 朱振亚王磊王旭东吕永涛陈立成黄丹曦苗瑞姜家良徐亚伟李青青张慧慧王佳璇
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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