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A lightly reduced graphene oxide nanofiltration membrane, preparation method and application thereof

A graphene nanofiltration membrane and nanofiltration membrane technology are applied in the field of mildly reduced graphene oxide nanofiltration membrane and its preparation, which can solve the problems of difficult control of reduction degree, difficult waste liquid treatment, complicated process, etc. High-efficiency water treatment capacity, low equipment requirements, and simple operation

Active Publication Date: 2022-01-21
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a lightly reduced graphene oxide nanofiltration membrane and a preparation method thereof, which are used to solve the existing problems in the prior art: the process of preparing the reduced graphene oxide nanofiltration membrane is relatively complicated, and waste liquid treatment is difficult. There are many additives, high cost, and technical problems that the degree of reduction is not easy to control

Method used

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  • A lightly reduced graphene oxide nanofiltration membrane, preparation method and application thereof
  • A lightly reduced graphene oxide nanofiltration membrane, preparation method and application thereof
  • A lightly reduced graphene oxide nanofiltration membrane, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0056] A method of preparing a mildly reduced oxide oxide noodle filter, including the following steps:

[0057] Preparation of oxidation of graphene dispersion

[0058] The oxidized graphene slurry or the oxide oxide powder is added to deionized water, and the ultrasonic frequency is 30min, and the magnetic force is stirred for 30 min, the stirring speed is 600 r / min, thereby continuous ultrasonic 30 to 40 kHz, magnetic force The stirring was stirred and the stirring speed was 600 r / min, and then the ultrasonic frequency was 30 min, the ultrasonic frequency was 30 to 40 kHz, and the magnetic force was stirred for 30 min, and the stirring velocity was 600 r / min to give a sufficiently dispersed oxide water dispersion.

[0059] Preparation of oxide oxide mean membrane

[0060] The 5 × 5 cm square PVDF diaphragm was soaked in 95% ethanol in aqueous solution of soon 30min, and was rinsed by deionized water, soaking the diaphragm after rinse is in the deionized water, and the who...

Embodiment 2

[0065] A method of preparing a mildly reduced oxide oxide noodle filter, including the following steps:

[0066] Preparation of oxidation of graphene dispersion

[0067] The oxidized graphene slurry or the oxide oxide powder is added to deionized water, and the ultrasonic frequency is 30min, and the magnetic force is stirred for 30 min, the stirring speed is 600 r / min, thereby continuous ultrasonic 30 to 40 kHz, magnetic force The stirring was stirred and the stirring speed was 600 r / min, and then the ultrasonic frequency was 30 min, the ultrasonic frequency was 30 to 40 kHz, and the magnetic force was stirred for 30 min, and the stirring velocity was 600 r / min to give a sufficiently dispersed oxide water dispersion.

[0068] Preparation of oxide oxide mean membrane

[0069] The 5 × 5 cm square PVDF diaphragm was soaked in 95% ethanol in aqueous solution of soon 30min, and was rinsed by deionized water, soaking the diaphragm after rinse is in the deionized water, and the who...

Embodiment 3

[0074] A method of preparing a mildly reduced oxide oxide noodle filter, including the following steps:

[0075] Preparation of oxidation of graphene dispersion

[0076]The oxidized graphene slurry or the oxide oxide powder is added to deionized water, and the ultrasonic frequency is 30min, and the magnetic force is stirred for 30 min, the stirring speed is 600 r / min, thereby continuous ultrasonic 30 to 40 kHz, magnetic force The stirring was stirred and the stirring speed was 600 r / min, and then the ultrasonic frequency was 30 min, the ultrasonic frequency was 30 to 40 kHz, and the magnetic force was stirred for 30 min, and the stirring velocity was 600 r / min to give a sufficiently dispersed oxide water dispersion.

[0077] Preparation of oxide oxide mean membrane

[0078] The 5 × 5 cm square PVDF diaphragm was soaked in 95% ethanol in aqueous solution of soon 30min, and was rinsed by deionized water, soaking the diaphragm after rinse is in the deionized water, and the whol...

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Abstract

The invention discloses a preparation method of a lightly reduced graphene oxide nanofiltration membrane, comprising the following steps: preparing a graphene oxide nanofiltration membrane and passing a graphene oxide dispersion liquid through a base membrane to obtain a graphene oxide nanofiltration membrane; preparing a light Highly reduced graphene oxide nanofiltration membrane The graphene oxide nanofiltration membrane is irradiated with an ultraviolet analyzer for 0.5 to 36 hours to obtain a slightly reduced graphene oxide nanofiltration membrane. The lightly reduced graphene oxide nanofiltration membrane prepared by the present invention does not reduce the graphene oxide dispersion before film formation, and does not need additional additives such as dispersants and catalysts, so as to avoid intercalation between graphene oxide sheets to maintain Graphene oxide inherent interlayer spacing; the method has the advantages of simple operation, low energy consumption, low equipment requirements, and environmental friendliness. At the same time, the present invention adopts the method of ultraviolet radiation reduction with simple operation, low energy consumption, low equipment requirements, and environmental friendliness And without adding chemical additives, it can save production costs for enterprises.

Description

Technical field [0001] The present invention relates to the technical field of nanofiltration separation membranes, and is specifically, refers to a mild reduction of oxide oxide numeral membrane and its preparation method thereof. Background technique [0002] Nonofiltration technology is a new type of membrane separation technology. The nanofiltration membrane has a nanoscale microporous structure having a relative intercepting molecular weight between 200 to 1000, between the ultrafiltration membrane and the reverse osmosis membrane, and the effect of charge effect, it is softened, separated from different price ions. High and low molecular weight organic bracages, low and low relative molecular weight organic matter exiled salts, etc., their unique advantages are shown. In addition, since the energy consumption of the nanofiltration technology is relatively reverse osmosis, the working pressure is smaller than the reverse osmosis membrane, so the application of nanofiltration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D69/10B01D67/00C02F1/44C02F103/08
CPCB01D71/021B01D69/10B01D67/0079C02F1/442C02F2103/08
Inventor 何毅余昊范毅陈春林钟菲马静高艺轩侯瑞彤
Owner SOUTHWEST PETROLEUM UNIV
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