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Graphene oxide-ceramic hybrid coating layer, and method for preparing the same

A technology of graphene and ceramics, applied in coatings, heat-sensitive coatings, devices for coating liquids on surfaces, etc., can solve problems such as property degradation

Inactive Publication Date: 2015-04-29
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, treatments to remove contained moisture can degrade these properties

Method used

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  • Graphene oxide-ceramic hybrid coating layer, and method for preparing the same
  • Graphene oxide-ceramic hybrid coating layer, and method for preparing the same
  • Graphene oxide-ceramic hybrid coating layer, and method for preparing the same

Examples

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Embodiment approach

[0041] According to another exemplary embodiment, the method for preparing a graphene oxide-ceramic hybrid coating may include: preparing a solution including graphene oxide slurry replaced by a first non-aqueous solvent; mixing the solution with a second non-aqueous solvent A water-based solvent and a ceramic precursor are combined to prepare a mixture; a dispersant and water are added to the mixture to prepare a graphene oxide-ceramic hybrid sol solution; and a substrate is coated with the graphene oxide-ceramic hybrid sol solution.

[0042] The preparation of the solution including the graphene oxide slurry replaced by the first non-aqueous solvent may be the first process of preparing the graphene oxide-ceramic hybrid coating to replace the aqueous environment of the graphene oxide slurry with a non-aqueous environment. Specifically, the process may include performing mechanical dispersion treatment and centrifugation after mixing the graphene oxide aqueous slurry with the ...

preparation example 1

[0054] (Preparation of water-based GO slurry)

[0055] 10 g of natural graphite and 7.5 g of sodium nitrate were placed in the reactor and 621 g of 96% sulfuric acid was slowly added while stirring. After the three materials were well mixed, 45g of manganese peroxide was added. Since manganese peroxide has an explosion risk and generates heat and gas when reacting with strong sulfuric acid, manganese peroxide was added slowly over about 1 hour. After adding manganese peroxide, the resultant was stirred and reacted at room temperature for about 4 to 6 days. Then, 1 L of 5% sulfuric acid solution was added. The reactor was properly cooled and sulfuric acid was added slowly over 1 hour due to the large amount of heat and gas that could be generated. Furthermore, the resultant was left to stand at room temperature for one day while stirring. After one day, slowly add 30g30% hydrogen peroxide and react for 2 hours. To remove a large amount of sulfuric acid and hydrogen peroxid...

preparation example 2

[0058] (Preparation of GO slurry containing IPA)

[0059] 100 g of aqueous GO slurry (eg, 2.5% solids content by thermal analysis) was placed in a 500 ml plastic bottle, 300 ml of IPA was added thereto, and the mixture was ultrasonically dispersed for 5 min. Centrifuge H at 3000 rpm 2 GO solution dispersed in O / IPA, the supernatant was removed, and the IPA addition process and supernatant removal process were repeated 10 times. Thus, an IPA-containing GO slurry was obtained. When the IPA addition-dispersion-centrifugation-supernatant removal process was performed at least three times, H 2 The removal efficiency of O is improved.

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Abstract

A graphene oxide-ceramic hybrid coating layer formed from a graphene oxide-ceramic hybrid sol solution that includes graphene oxide (GO) and a ceramic sol and a method of preparing the coating layer are provided. A content of graphene oxide in the graphene oxide-ceramic hybrid coating layer is about 0.002 to about 3.0 wt % based on the total weight of the graphene oxide-ceramic hybrid coating layer.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2013-0125886 filed on October 22, 2013 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to graphene oxide-ceramic hybrid coatings and methods of making the same. Background technique [0004] Graphene oxide (or graphite oxide, hereafter GO) is a sheet-like carbon material prepared by acid treatment of graphite, and has a large number of hydrophilic functional groups on the surface, such as carboxyl (-COOH), hydroxyl (-OH )Wait. Surface oxidized groups generated by the acid treatment process react with water (H 2 O) Hydrogen bonding occurs naturally, so GO prepared by this process is in the form of hydrated or aqueous slurry state. Typically, without further treatment, the slurry has a solids content of about 2 to 8 wt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22C08J7/04B60Q1/04
CPCC03C17/256C03C2217/23C09D1/00C09D5/26B60Q1/04B05D1/005B05D1/02B05D1/18B05D1/28B05D1/30B05D1/40
Inventor 张光镒宋喆圭金多慧许胜宪
Owner HYUNDAI MOTOR CO LTD
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