Orientation of reduced graphene oxide in composite coatings

Knut Thorshaug; Terje Didriksen; Ingvild Thue Jensen; Patricia Almeida Carvalho; Juan Yang; Mathieu Grandcolas; Alain Ferber; Andy M. Booth; Özlem Ağaç; Hüseyin Alagöz; Nursev Erdoğan; Anıl Kuban; Branson D. Belle

doi:10.1039/D3NA01057K

Orientation of reduced graphene oxide in composite coatings†

Knut Thorshaug,

*^a Terje Didriksen,

^a Ingvild Thue Jensen,

^a Patricia Almeida Carvalho,

^a Juan Yang,

^a Mathieu Grandcolas,

^a Alain Ferber,^b Andy M. Booth,

^c Özlem Ağaç,

^d Hüseyin Alagöz,

^d Nursev Erdoğan,

^e Anıl Kuban

^e and Branson D. Belle

^a

Author affiliations

* Corresponding authors

^a SINTEF Industri, Forskningsveien 1, NO-0373 Oslo, Norway
E-mail: knut.thorshaug@sintef.no

^b SINTEF Digital, Forskningsveien 1, NO-0373 Oslo, Norway

^c SINTEF Ocean, Brattørkaia 17C, NO-7010 Trondheim, Norway

^d Nanografi Nanotechnology AS, ODTÜ Teknokent No: 13/1-1 06531 Çankaya, Ankara, Turkey

^e Turkish Aerospace, Functional Coatings & Transparencies Technology Centre, Ankara, Turkey

Abstract

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.

Nanoscale Advances

Orientation of reduced graphene oxide in composite coatings†

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Orientation of reduced graphene oxide in composite coatings

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