Method for preparing amino silane functionalized graphene through electrochemical stripping

An aminosilane and electrochemical technology, applied in the field of electrochemical exfoliation to prepare aminosilane-functionalized graphene, can solve the problems of less defects, complicated preparation process, good dispersibility, etc. The effect of good performance and complete crystal structure

Inactive Publication Date: 2021-12-21
广东腐蚀科学与技术创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing aminosilane-functionalized graphene by electrochemical exfoliation. In view of the shortcomings of the existing preparation of aminosilane-functionalized graphene technology, the preparation process is complicated, time-consuming, and not environmentally friendly. A method for preparation of aminosilane-functionalized graphene by electrochemical exfoliation with few steps, safety, environmental protection and low cost, and the prepared aminosilane-functionalized graphene has few defects and good dispersion

Method used

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  • Method for preparing amino silane functionalized graphene through electrochemical stripping
  • Method for preparing amino silane functionalized graphene through electrochemical stripping
  • Method for preparing amino silane functionalized graphene through electrochemical stripping

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Mix 3-aminopropyltriethoxysilane with deionized water, the volume ratio of 3-aminopropyltriethoxysilane to deionized water is 1:4, and hydrolyze for 5h at room temperature to obtain Aminosilane mixed solution, the aminosilane mixed solution is added to the ammonium sulfate solution (0.1mol / L), the volume ratio of the aminosilane mixed solution and the ammonium sulfate solution is 1:20, and the electrochemical stripping solution is obtained;

[0035] (2) Place the electrolytic cell in an 80°C constant temperature water bath, connect the graphite rod to the anode of the power supply, connect the lead plate to the cathode of the power supply, and immerse the connected graphite rod and lead plate vertically and parallelly into the electrochemical process of step (1). In the stripping solution, under the constant voltage condition of 10V, carry out electrochemical stripping, until no graphite solid is detached from the electrode, the stripping ends, and the graphene precu...

Embodiment 2

[0041] (1) Mix 3-aminopropyltrimethoxysilane with deionized water, the volume ratio of 3-aminopropyltrimethoxysilane to deionized water is 1:4, and hydrolyze for 3 hours at room temperature to obtain aminosilane Mixed solution, adding the aminosilane mixed solution to the ammonium sulfate solution (0.5mol / L), the volume ratio of the aminosilane mixed solution and the ammonium sulfate solution is 1:100, to obtain an electrochemical stripping solution;

[0042] (2) Place the electrolytic cell in a 70°C constant temperature water bath, connect the graphite rod to the anode of the power supply, connect the lead plate to the cathode of the power supply, and immerse the connected graphite rod and lead plate vertically and parallelly into the electrochemical process of step (1). In the peeling solution, under the condition of 5V constant voltage, electrochemical peeling is carried out until no graphite solid is separated from the electrode, and the peeling is completed, and the graphe...

Embodiment 3

[0045] (1) Mix 3-aminopropyl monomethyldiethoxysilane with deionized water, the volume ratio of 3-aminopropyl monomethyldiethoxysilane to deionized water is 1:4, at room temperature Under the conditions of hydrolysis for 8h, the aminosilane mixture was obtained, and the aminosilane mixture was added to the ammonium sulfate solution (0.3mol / L), and the volume ratio of the aminosilane mixture to the ammonium sulfate solution was 1:50, and the electrochemical stripping solution;

[0046] (2) Place the electrolytic cell in a 90°C constant temperature water bath, connect the graphite rod to the anode of the power supply, connect the lead plate to the cathode of the power supply, and immerse the connected graphite rod and lead plate vertically and parallelly into the electrochemical process of step (1). In the stripping solution, under the constant voltage condition of 15V, electrochemical stripping is carried out until no graphite solid is detached from the electrode, and the strip...

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Abstract

The invention discloses a method for preparing amino silane functionalized graphene through electrochemical stripping, and belongs to the technical field of graphene preparation. The preparation method comprises the following steps: mixing amino silane with deionized water, conducting hydrolyzing to obtain an amino silane mixed solution, and adding the mixed solution into an ammonium sulfate salt solution to obtain an electrochemical stripping solution; with a graphite rod as an anode and a lead plate as a cathode, performing electrochemical stripping by using an electrochemical stripping solution to obtain an aminosilane modified graphene precursor solution; and then conducting centrifuging, washing, suction filtration and drying to obtain the amino silane functionalized graphene. On the basis of preparing graphene through electrochemical stripping, the aminosilane functionalized graphene material with few defects and good dispersity is rapidly obtained in a mixed aqueous solution of aminosilane and ammonium sulfate salt through an electrochemical stripping method by selecting a proper electrochemical stripping solution and optimizing a stripping process.

Description

technical field [0001] The invention relates to the technical field of graphene preparation, in particular to a method for preparing aminosilane functionalized graphene by electrochemical exfoliation. Background technique [0002] As a two-dimensional layered carbon nanomaterial, graphene has excellent physical and chemical properties such as light, electricity, force, and heat. Graphene and its derivatives include graphene oxide, redox graphene, and modified graphene. Among them, modified graphene has special functionality and good formability, and has a wide range of applications in many fields such as polymer materials and biomaterials. [0003] Graphene preparation methods include chemical vapor deposition method, epitaxial growth method, arc discharge method, oxidation exfoliation method, solvent liquid phase exfoliation method, mechanical exfoliation method and other preparation methods. The method of macro-preparation of graphene oxide is mainly the Hummers method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194
CPCC01B32/19C01B32/194
Inventor 黎恒君郝建军王双红青勇权刘常升韩恩厚
Owner 广东腐蚀科学与技术创新研究院
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