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Preparation method for reinforced graphene surfactant

A graphene surface and active agent technology, which is applied in the field of graphene surfactant preparation, can solve the problems of poor compatibility between graphene oxide and organic solvents, and achieve low cost, short production cycle and good repeatability.

Inactive Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problem of poor compatibility between existing graphene oxide and organic solvents, and at the same time retain the carboxyl group at the edge of graphene oxide to ensure its hydrophilicity, thereby providing an enhanced graphene surface activity The preparation method of the agent

Method used

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  • Preparation method for reinforced graphene surfactant
  • Preparation method for reinforced graphene surfactant
  • Preparation method for reinforced graphene surfactant

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of a kind of enhanced graphene surfactant of the present embodiment is carried out according to the following steps:

[0025] 1. Preparation of graphene oxide: Add 23mL of concentrated sulfuric acid with a mass concentration of 98% to a 250mL large beaker, ice-bath, then add 1g of natural graphite, and stir for 10-40min at a speed of 300-400r / min , add 6 g of KMnO in 6 times on average at a temperature of 0-5 °C 4 , then stirred at a speed of 300-400r / min for 2-2.5h, replaced the ice bath, placed in a constant temperature water bath at 30-40°C, stirred at a speed of 300-400r / min for 30-60min, and the solution became viscous. Finally, the water temperature is stabilized at 40-50°C, and then transferred to an 80°C constant temperature water bath for stirring at 300-400r / min. After ~20min, add 60mL of distilled water to dilute, add 10.81mL of 30% hydrogen peroxide and 60mL of distilled water to form a mixed solution, after u...

specific Embodiment approach 2

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that 1 g of natural graphite is added in Step 1, and the mixture is stirred for 30 minutes at a rotation speed of 400 r / min. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, place in a constant temperature water bath at 30° C. and stir at 300 r / min for 40 min. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method for a reinforced graphene surfactant. The objective of the invention is to overcome the technical problem of poor compatibility between graphene oxide and organic solvents in the prior art while maintain carboxyl groups at the edge of graphene oxide and guarantee hydrophilicity of graphene oxide. The method comprises the following steps: 1, preparation of graphene oxide; 2, preparation of brominated graphene; 3, preparation of sodium ethoxide; and 4, grafting of a -OCH2CH3 group on the surface of graphene: a step of adding the brominated graphene powder prepared in the step 2 into 10 mL of tetrahydrofuran, carrying out ultrasonic treatment, then adding sodium ethoxide prepared in the step 3, continuing ultrasonic treatment, then carrying out reflux, subjecting the obtained solution to centrifugation with ethanol at first and then successively carrying out cleaning and then drying in a vacuum drying box so as to obtain a solid which is the reinforced graphene surfactant. The method has the advantages of simplicity, low cost, good repeatability, a short production period, etc. The preparation method is applied to the field of preparation of graphene surfactants.

Description

technical field [0001] The invention relates to a preparation method of a graphene surfactant. Background technique [0002] Graphene is a material with excellent properties developed in recent years. It consists of carbon atoms with sp 2 Composed of hybrid-connected monoatomic layers, it is the thinnest two-dimensional material found so far. This special structure makes it contain many peculiar physical and chemical properties, such as high specific surface area and excellent thermal conductivity, mechanical properties and electron transfer ability. Graphene oxide is generally obtained by oxidation of graphite with strong acid. There are mainly three methods for preparing graphite oxide: Brodie method, Staudenmaier method and Hummers method. Among them, the preparation process of the Hummers method has relatively good timeliness and safety, and is currently the most commonly used one. The main raw materials of the Hummers method are concentrated sulfuric acid, potassium...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 矫维成丁国民王荣国刘文博杨帆牛越郝立峰徐忠海赫晓东
Owner HARBIN INST OF TECH
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