Orientation of reduced graphene oxide in composite coatings

Composite coatings containing reduced graphene oxide (rGO) and 3-(aminopropyl)triethoxysilane functionalised rGO (APTES-rGO) were prepared by sol–gel technology and deposited on Al 2024 T-3. Covalent functionalisation of GO by APTES occurred by formation of amide bonds, accompanied by GO reduction....

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Main Authors: Thorshaug, Knut, Didriksen, Terje, Jensen, Ingvild Julie Thue, Almeida Carvalho, Patricia, Yang, Juan, Grandcolas, Mathieu, Ferber, Alain Marc C, Booth, Andy, Ağaç, Özlem, Alagöz, Hüseyin, Erdoğan, Nursev, Kuban, Anil, Belle, Branson Delano
Format: Article
Language:English
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Summary:Composite coatings containing reduced graphene oxide (rGO) and 3-(aminopropyl)triethoxysilane functionalised rGO (APTES-rGO) were prepared by sol–gel technology and deposited on Al 2024 T-3. Covalent functionalisation of GO by APTES occurred by formation of amide bonds, accompanied by GO reduction. The thin sheets were retained. The hydrophilicity of the coating increased when APTES-rGO was added. The opposite was observed when GO was added. A key finding is that the rGO flakes agglomerate and lie in a random orientation in the coating, whereas the APTES-rGO flakes are more evenly distributed in the matrix and appear to lie along the plane of the substrate.
ISSN:2088-2095