Surface modification of graphene for use as a structural Fortifier in water-borne epoxy coatings

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Liu, Ya,1991Fudan University,Chalmers tekniska högskola,Chalmers University of Technology (författare)

Graphene, the typical two-dimensional sp2 hybridized carbon allotrope, is widely used as a filler for improving the mechanical performance of polymers. However, its superhydrophobic surface makes it a big challenge to obtain stable graphene dispersions, especially in water-borne systems. On the contrary, graphene oxide (GO) shows excellent dispersibility in water, but strong oxidants and acids destroy its structure and degrade its mechanical properties. This largely limits its application in water-borne coatings. In this work, graphene from mechanical exfoliation was surface modified by p-aminophenol derived diazonium salt to achieve a homogenous dispersion. Moreover, the hydroxyl groups in p-aminophenol are able to combine with epoxy resins during the curing process to improve mechanical performance of the final coatings. The result shows that functionalized graphene shows a lower coefficient of friction and better abrasion resistance compared to GO.

Xia, Chao (författare)
Zehri, Abdelhafid,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hafid (författare)
Ye, L.SHT Smart High-Tech AB (författare)
Wang, NanSHT Smart High-Tech AB (författare)
Zhmud, Boris (författare)
Lu, HongbinFudan University (författare)
Liu, Johan,1960Chalmers tekniska högskola,Chalmers University of Technology,Shanghai University(Swepub:cth)jliu (författare)
Fudan UniversityChalmers tekniska högskola (creator_code:org_t)

Av författaren/redakt...: Liu, Ya, 1991; Xia, Chao; Zehri, Abdelhafi ...; Ye, L.; Wang, Nan; Zhmud, Boris; visa fler...; Lu, Hongbin; Liu, Johan, 1960; visa färre...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Kemiteknik; och Polymerteknologi

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