Surface modification of graphene for use as a structural Fortifier in water-borne epoxy coatings
Journal article, 2019

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.

Tribological properties

Functionalized graphene

Water-borne epoxy

Author

Ya Liu

Fudan University

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Chao Xia

Applied Nano Surfaces AB

Abdelhafid Zehri

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

L. Ye

SHT Smart High-Tech

Nan Wang

SHT Smart High-Tech

Boris Zhmud

Applied Nano Surfaces AB

Hongbin Lu

Fudan University

Johan Liu

Shanghai University

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Coatings

20796412 (eISSN)

Vol. 9 11 754

Subject Categories

Polymer Chemistry

Polymer Technologies

DOI

10.3390/coatings9110754

More information

Latest update

2/10/2020